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2015-02-23 Development Application Materials
Eric Johnson From: Adams,Jennifer <JenniferAdams @metc.state.mn.us> Sent Monday, February 23,2015 2:36 PM To: 'Mike Isensee' Cc: James Landini; Eric Johnson Subject: Outfall Pipe to St.Croix Attachments: 001-02700A-0 APPROVED Bayport Outfall Replacement.pdf;work description.pdf; Landscaping.pdf;Outfall Conformed_Drawings.pdf;Geotechnical.pdf;SWPPP - St Croix WWTP.pdf Good Morning Mike, I would like to apologize that the information you requested from the Metropolitan Council was not communicated immediately. I was out of the office on FMLA, due to surgery, since the beginning of the month . While I cannot alter the lack of communication that has transpired, I have taken steps to ensure that similar incidents will not occur in the future. As the Principal Contract Administer for the construction phase of this outfall replacement project, I will be taking over responsibility from Tim Amstutz for MCES compliance of MSCWMO rules. I will obtain and provide any information the MSCWMO requires. I genuinely appreciate your gracious offer to collaborate with us on this project. I value your time,and I'm committed to responding to questions, information requests, and/or concerns that you may have in a timely manner. Included for your review is the contractor's work plan (001-02700A-0 APPROVED Bayport Outfall Replacement.pdf), a detail of the access road (work description.pdf),the project landscaping specification, Contract Plan Sheets(Outfall Conformed Drawings.pdf), soil boring reports (Geotechnical.pdf), and the St. Croix Plant SWPPP. To date,the construction is at step 3 of the work sequence noted on page 5 of the contractor's work plan (001-02700A-0 APPROVED Bayport Outfall Replacement.pdf). I would like to schedule a meeting to discuss the project, and will send out a doodle poll shortly to inquire about available meeting times. I value a professional relationship between the Washington Conservation District and Metropolitan Council. Please accept my apology for the delay in communication. Respectfully, Jennifer Adams Jennifer .Adams Principal Contract Administrator Jennifer.Adams @metc.state.mn.us Metropolitan Council Environmental Services METROPOLITAN P.651.602.8327 I C.651.755.3479 I F.651.602.8900 C O U N C I L 2500 Childs Road I St.Paul, MN 1 55106-6726 I metrocouncil.orq 1 CONNECT WITH US WO m killurrn e-news From: Mike Isensee [mailto:Mlsensee @mnwcd.org] Sent: Monday, February 23, 2015 8:42 AM To: Amstutz,Timothy; Slocum, Steve Cc: Adams,Jennifer; Mangowi,James; James Landini; Eric Johnson; Sventek, Judy Subject: RE: Outfall Pipe to St. Croix Hello Tim, The inability of the Metropolitan Council to provide any information on the status of this project over the last two weeks is concerning. As stated earlier, based on the limited information the MSCWMO has received this project requires a review by the MSCWMO prior to the start of construction. Please submit an application for review. Full application materials and review timelines are located here: http://www.mscwmo.org/project-review-program Thank you, Mike Mikael Isensee, CPESC I Administrator Middle St.Croix Watershed Management Organization Watershed Specialist I Washington Conservation District 1455 Hayward Ave. I Oakdale, MN 55128 1E651-330-8220 Ext. 22 I Fax 651-330-7747 NEW CELL PHONE NUMBER: 612-839-6492 I misensee(a�mnwcd.orq www.mscwmo.orgwww.mnwcd.orq From: Amstutz,Timothy [mailto:timothy.amstutz@)metc.state.mn.usi Sent:Thursday, February 12, 2015 11:40 AM To: Mike Isensee; Slocum, Steve Cc:Adams,Jennifer; Mangowi,James; James Landini Subject: RE: Outfall Pipe to St. Croix Steve, Please provide an update to Mike Isensee regarding construction scheduling. Thanks. Tim From: Mike Isensee [mailto:Mlsensee@c)mnwcd.orq] Sent:Thursday, February 12, 2015 11:35 AM To: Amstutz,Timothy 2 Cc: Slocum, Steve; Adams,Jennifer; Mangowi,James; James Landini Subject: RE: Outfall Pipe to St. Croix Hello Tim, I will update the board of managers about this project this evening at the monthly board meeting. Could you please confirm if the project has started so I can summarize where we are at in the process. Thank you, Mike Mikael Isensee,CPESC I Administrator Middle St.Croix Watershed Management Organization Watershed Specialist I Washington Conservation District 1 455 Hayward Ave. I Oakdale, MN 55128 NEW PHONE NUMBERS W651-330-8220 Ext.22 I Fax 651-330-7747 Cell:608-487-4052 ®misensee aamnwcd.org A www.mscwmo.org www.mnwcd.orq From: Mike Isensee Sent: Monday, February 09, 2015 2:35 PM To: 'Amstutz,Timothy' Cc: Slocum, Steve; Adams, Jennifer; Mangowi,James; James Landini Subject: RE: Outfall Pipe to St. Croix Hello Tim, This project did require a review by the MSCWMO. If the opportunity to review the project has passed and grading has started, we will require an onsite meeting to review the erosion and sediment controls in place and discuss practices, time frames and inspection records. Please indicate times that would work to meet on site this week and next. MSCWMO application materials and submittal requirements are located here: http://www.mscwmo.org/proiect-review- program Thank you, Mike Mikael Isensee, CPESC I Administrator Middle St.Croix Watershed Management Organization Watershed Specialist I Washington Conservation District 1 455 Hayward Ave. I Oakdale, MN 55128 NEW PHONE NUMBERS ' 651-330-8220 Ext. 22 I Fax 651-330-7747 Cell:608-487-4052®misenseeamnwcd.org A www.mscwmo.orq www.mnwcd.orq From: Amstutz,Timothy [mailto:timothy.amstutz @metc.state.mn.us] Sent: Monday, February 02, 2015 3:01 PM To: Mike Isensee Cc: Slocum, Steve; Adams,Jennifer; Mangowi,James Subject: RE: Outfall Pipe to St. Croix I believe construction starts early next week. Thanks. Tim 3 From: Mike Isensee [mailto:Mlsensee @mnwcd.org] Sent: Monday, February 02, 2015 2:28 PM To: Amstutz,Timothy Subject: RE: Outfall Pipe to St. Croix Thank you Timothy. What is the anticipated date of construction? Mike Mikael Isensee,CPESC I Administrator Middle St.Croix Watershed Management Organization Watershed Specialist I Washington Conservation District 1 455 Hayward Ave. I Oakdale, MN 55128 NEW PHONE NUMBERS 5651-330-8220 Ext. 221 Fax 651-330-7747 Cell:608-487-4052 ®misenseeamnwcd.orq www.mscwmo.orq www.mnwcd.orq From: Amstutz,Timothy [mailto:timothy.amstutz @metc.state.mn.us] Sent: Monday, February 02, 2015 2:24 PM To: Mike Isensee Subject: Outfall Pipe to St. Croix Attached is the plan set for the effluent pipe to the St.Croix. Please call with questions. Thanks. Timothy Amstutz, P.E. Project Manager Engineering Services P.651.602.12tz(a�metc.51.497. .5 s P.651.602.1221 � C.651.497.0589 390 North Robert Street I St. Paul, MN 55101 metrocouncil.orq METROPOLITAN C o u N C I CONNECT WITH US NNW e-news 4 II f?..[. to tri+4:1 1 c W - (,�'7/)��� /j///C/V./R-111/ /R-Y v Ia r / $ i�,i LI O $d 11GyF 3 1( k .1 w 4t 6 o r 1 ! f0t F g I it i /t < e. 5 f . J A s E w § I ,- — 0 p mi E f,5 L 1 0 o o6 i I Z w � < ' Oo o - n n m a o r1 L----1, g 0 0 ! _ ri. iii IN „61 0 U..I -, J ,;. 1, ,, th \ 11!!!!!!!!!!!!t111111:1[411 ----, 'Z rEkEEELEEEELbE LEEL bL ELbEEE Sri s i 6 rtitiff""ti'lltIF 0::: (::1::: ii3 i ,i' ,. -k: ' -:i' '.;:: ' - f,'i', 0 D , rig Y0+4 Id um. iciL W i CI 0171z.0 Id 1 , s bffllifIM= N MK fl®BL M11Ot1 0MQ1.1i130.0331.813.8.1M1.117.11100 SHOLIV.1100110XIMNOLLYttiY WAN1 AN T.,XIJ.O'IHOlYM84l1dtl�lfYMVtlQ03'Jn O1..1f9Y1' 003YMQiN0y.L3303.......511wL&WIJ•NOII.11.2.34.0/.99NlO000.1* SHOP DRAWING TRANSMITTAL Shank Constructors, Inc. TKDA Met. Council Environmental Serv. 3501 85th Avenue N 444 Cedar Street, Suite 1500 Metro Construction Field Office Brooklyn Park,MN 55443 Saint Paul,MN 55101 2500 Childs Road jasonAshankconstructors.com amv.patterson( tkda.com St. Paul,MN 55106-1626 Jennifer.Adams@metc.state.mn.us ATTN: Jason Shank ATTN: Amy Patterson ATTN: Jennifer Adams PROJECT NO. 807810 PROJECT NAME: St. Croix Valley WWTP Aeration Piping Modifications and Outfall Repairs INITIALS -DATE Shank Const.to TKDA JS 12/15/14 TRANSMITTAL: 001-02700A-0 Shank Const.to MCES TKDA to Shank Const. SPEC.NO.: 02700A TKDA to MCES Const. AMP 12/22/14 SPEC. TITLE: Gravity Sanitary Sewer MCES Const.to Shank Const. SAS 12/23/14 NO. OF DRAWING ACTION COPIES DESCRIPTION OF ITEM NUMBER TAKEN 1 Bayport Outfall Replacement B REMARKS BY CONTRACTOR: THE ABOVE TRANSMITTAL IS RETURNED WITH THE ACTION DESIGNATED ABOVE IN ACCORDANCE WITH THE FOLLOWING LEGEND: A=FURNISH AS SUBMITTED, = C =REVISE&RESUBMIT, D=REJECTED, E=ENGINEER'S REVIEW NOT REQUIRED. REMARKS BY APPROVER: APPROVAL IS CONTINGENT ON THE REVIEW AND APPROVAL TKDA OF THE PIPE AND MAINTENANCE HOLE SHOP DRAWINGS Project#: 13P219 ❑ A-Furnish as Submitted DISTRIBUTION OF SHOP DRAWINGS BY MCES: n R—Fiirnish RC Nntpd 1 CAR Copy 1 Contractor ❑ C—Revise and Resubmit 1 Field Copy 1 Consultant ❑ D-Rejected 1 Operations ❑ t-,vt s Neview not Required 1 Project Manager Review is for general compliance with the design nnrarf of tho Prnjorf This review shall not relieve the Contractor from responsibility for all details for Shop draw design dimensions, etc., ggee�ce rc for the proper fitting and construction of4PPX' c squired by the Contract. By,E. KLINGBEIL Date: 12/19/2014 L Attachment to MCES Shop Drawing Transmittal#001-02700A-0 MCES MWWTP East Area Improvements MCES Project Number 807810, 800614,807820—Metropolitan Council Contract Number 13P219 SUPPLEMENTAL COMMENTS FROM REVIEWER SUBMITTAL NO. 001-02700A-0 SPEC SECTION/ Bayport Outfall Replacement SUBJECT COMMENT Ref#in REVIEW COMMENTS NO. Section 1. The submittal was reviewed only for general conformance to the design concept and general compliance with the contract documents. 2. Additional submittals will be required for specific compliance. 3. The contractor is proposing building an access road in lieu of using a construction barge. Corps of Engineers approval is required prior to constructing an access road. 4. As a reminder to the contractor,Specification Section 800 limits contractor working hours to 6:OOam-1:45pm Monday-Friday and no Saturday or Sunday work is allowed. 5. Any equipment that enters the river bottom below the Ordinary High Water Level(OHWL) of 679.5'must be properly cleaned before leaving the area below the OHWL. 6. 7. 8. 9. 10. 11. 12. 13. Reviewer Action: B- Furnish as Noted Reviewers: Eric Klingbeil Date: 12/19/2014 Page 1 of 1 Shank Constructors Inc. 3501 85th Ave. N., Brooklyn Park, MN 55443 763-424-8300 Fax: 763-424-8303 Submittal Cover Sheet Project Name: St. Croix Valley WWTP Specification Section: 02700A Description: Bayport Outfall Replacement Date Submitted: 12/15/14 Purchase Order No.: 1266-06 Supplier/Subcontractor: Lametti & Sons Reviewed for general conformance with the design concept of the Project and general compliance with the information given in the contract documents. Reviewed By: Jason Shank • LAMETTI & SONS, INC. LETTER OF TRANSMITTAL 16028 Forest Blvd. N P.O. Box 477 Hugo, MN 55038 Submittal: 003 DATE 12/15/14 ) JOB NO. 14300 (651)426-1380 FAX (651) 426-0044 ATTENTION Jason Shank RE TO: Shank Constructors, Inc. Bayport Outfall Replacement 3501 85th Ave. N. Brooklyn Park, MN 55443 SPECIFICATION 02700A—Gravity Sanitary Sewers WE ARE SENDING YOU: is Attached Under separate cover via the following items: © Shop Drawings 0 Prints ❑ Plans Samples [] Specifications ❑ Copy of letter El Change order n COPIES DATE NO. DESCRIPTION 1 Work Plan for Outfall Replacement THESE ARE TRANSMITTED as checked below: © For approval n Approved as submitted El Resubmit Copies for approval For your use n Approved as noted 0 Submit Copies for distribution El As requested n Returned for corrections [] Return Corrected prints El For review and comment ❑ ED FOR BIDS DUE n PRINTS RETURNED AFTER LOAN TO US REMARKS COPY TO Job File SIGNED Mark R. Jay— Project Manager Direct Dial 651-789-3023 Marki@lametti.com St. Croix Valley WWTP Outfall Replacement MCES Project Number 807810 Shank Mechanical Project Number 1266 Lametti&Sons, Inc.Project Number 14300 December 21,2014 Specification Section 02700A Gravity Sanitary Sewers This narrative will address the work plan Lametti &Sons, Inc.will implement to replace the existing outfall line. The outfall will be replaced from Sta. 2+80 to the end @ 5+40.47 with new 36" RCP pipe that will have all joints tied as required by the specification. New MH 2 (60")will be installed at Sta. 2+80,the build on this MH is 5.7 VF. New MH &Pipe will be as approved by this Specification Section. This information was submitted on 10-21-14. It has not been returned to Lametti& Sons, Inc. as of this date. The by-pass of the outfall will be as approved by Specification Section 01569 Temporary Conveyance that was submitted on 10-24-14. It was returned to Lametti on 11-12-14. Prior to the start of the outfall replacement Lametti&Sons, Inc.will secure written approval of the following agencies; Minnesota DNR MPCA Corps of Engineers Oak Park Heights Washington County The written approval will be forwarded at a later date. No work will take place when the river is above elevation 676.00. Pre-Construction photographs have already been completed by Marine Constructors, 1337 Hillswick Place, Mahtomedi, MN 55115,Contact:Connie Buchal,651-773-3530. Marine Constructors is an approved DBE vendor. Work sequence will be as follows: 1. Lametti will hold an onsite Pre-Con Meeting to discuss the work. 2. Utility locates will take place. 3. HTPO, 7510 Market Place Drive, Eden Prairie, MN 55344, Contact:Jim Barish,952-829- 0700 will do the staking&layout of the site. HTPO is an approved DBE vendor. 4. The site will be cleared of trees and brush with in the construction limits. 5. The by-pass pipe will be fused and strung out. 6. Erosion protection (silt fence of bio log)will be installed inside the work zone,the by- pass pipe will be outside the erosion control. 7. MH 3 will be excavated to approximately 684.62 and a temporary can will be installed to allow installation of the by-pass line and inflatable ball. The bypass line will be buried as detailed in approved 01569 submittal. 8. The by-pass will be activated as detailed in 01569. 9. Floating silt fence will be installed around the perimeter of our work in the river. 10.An access road will be constructed over the top of the river portion of existing pipe (approximately Sta.4+65 to Sta.5+40). 11. Existing river bottom materials will be excavated and placed off to the side in the water as the access is constructed. 12.The existing headwall will be removed as part of the access road installation. 13.The new RCP pipe will be installed from the discharge end @ Sta. 5+40 to Sta. 2+80 where new MH 2 will be installed. 14.The duration for the installation of the river pipe(Sta. 5+40 to 4+65)is estimated to be 1 day. 15.As the work progresses from the discharge to the shore the access road will be removed and the river bottom materials reinstalled. 16.Shore line will be armor protected with rip rap. 17.After MH2 is connected the by-pass will be removed,and MH 3 will be reconstructed. 18.Site grading will take place. 19.The site will receive temporary erosion protection. 20.When weather allows permanent seeding will be installed. 21.Trench shoring will be utilized for all pipe installation activities. During Construction activities the roadway if required will be swept by On Call Pavement Sweeping,P.O. Box 128, Elk River, MN 55330,Contact: Laura Miller, 612-709-8578. On Call is an approved DBE vendor. Terra Services, 15001 Hudson Road, P.O. Box 196, Lakeland, MN 55043, Contact: Dan Swenson, 651-789-1173 will provide erosion control services. Boone Container, 1516 Marshall Street. NE, Mpls, MN 55413, Contact:Sharon Persaud,612- 331-4381 will provide roll off dumpster services. Boone is an approved DBE vendor. Salas Trucking, Inc., 629 Crane Creek Lane, Eagan, MN 55121,Contact:Juan Salas,612-276- 3849 will provide trucking services. Salas is an approved DBE vendor. Airfresh Industries,P.O. Box 24,Stillwater, MN 55082, Contact:Kelly Thommes, 651-430-0916 will provide restroom sanitation services. Airfresh is an approved DBE vendor. It is our intent to replace the outfall within the confines of the construction limits. ' y • St.Croix Valley WWTP Outfall Replacement MCES Project Number 807810 Shank Mechanical Project Number 1266 Lametti&Sons,Inc.Project Number 14300 January 5,2015 Specification Section 02700A Gravity Sanitary Sewers Lametti&Sons,Inc.provided a work plan 001-02700A-0 on 12-15-14.It was approved on 12- 23-14.It was returned as'Furnish As Noted'. Molly Shodeen with the MN DNR requested detail of the access road. The attached exhthits detail how the road will be built to access the work In the water. The access road(cofferdam)will be constructed as follows: 1. Remove shore headwall and structure. 2. Install trench boxes In water. 3. Remove river bottom materials and stodtpIle outside of the cofferdam. o,JSA•re• 4. Install day seal to limit infiltration of river water. 5. Install new pipe,moving day seal with the progression of the pipe installation. 6. Install river bottom materials over top of new pipe and disturbed area within cofferdam. 7. Remove trench boxes. 8. Restore shore line and place rip rap armor protection. 9. Dewatering would be filtered through a filter box system as approved. t I� it f 807II0r i,/.7.1 s-l6- ,'/q Shan. 0.Ni . Exh,• 1 / �iYf!4014+! /i/4/ o/ '-7/Ca l-1 S/ve,,t Arra / N.., 36" 7:p. 1 j Skti Clown >'lo�c • 7 well aox 7'...,p eu...J<y wcc-L..w 4,71 u-M.iS rJetsl7.o....J Yrwck aeX s,zt IS APp.•X s*{X/2 6V8SI,C q 0 6-1-00 6-{-(o stg0 s•No P14.0 VICui ,✓ !-r-ir .•xrq E,c 6•'f . Tim MA .t T 5.vre.,i1- 2 ioti I c? wed el��«/,ems L74.0e ell Sr./ C 3i. 7r.icit lox COnert.1e.n e/e(,.S,0 V c.✓ Metropolitan Council Environmental Services St Croix Valley WWTP Aeration Piping Modifications and Outfall Repairs SECTION 02900A LANDSCAPING PART 1 - GENERAL 1.1 SUMMARY A. Section Includes furnishing and installing sod, seeded turf, native seed, and plantings as shown and as specified. Include incidental work in connection therewith. B. Related Sections. See other Division Two specifications for related work. 1.2 REFERENCES A. American National Standards Institute (ANSI) 1. Z60.1-1986 American Standard for Nursery Stock B. American Society for Testing and Materials (ASTM) 1. C33-90 Specification for Concrete Aggregates C. American Wood Preservers Bureau (AWPB) 1. Standard LP-22 Standard for Softwood Lumber, Timber and Plywood Pressure Treated with Water-Borne Preservatives for Ground Contact Use, Rev. March, 1980 D. Minnesota Department of Transportation (MnDOT) Standard Specifications for Highway Construction, 2005 Edition. 1. 3876 Seed. 2. 3877 Topsoil Borrow. 3. 3878 Sod. 4. 3881 Fertilizer. 5. 3882 Mulch Material. 6. 3884 Hydraulic Soil Stabilizer. 7. 3885 Erosion Control Blankets. MCES Project No.807810 Landscaping Contract No.13P219 02900A-1 Metropolitan Council Environmental Services St Croix Valley WWTP Aeration Piping Modifications and Outfall Repairs 1.3 SUBMITTALS A. Certification of plant materials for conformance with inspection requirements of State, County, and Local Authorities, and of seeds for purity and germination rates specified in this Section, shall be submitted in accordance with Section 01300 SUBMITTALS. B. Permits. Submit copies of executed permits required by state, county and local authorities approving transportation, handling and use of plant materials and chemicals. C. Provide source and invoice for seed to be used for this Project. D. Producer's certificate of compliance — Written documentation verifying compliance of mixture of seed furnished. Include percentage of various seed species, year of production, germination rate, seed bag tags, and weed seed content. Submit to the ENGINEER at least 5 days prior to delivery. 1.4 QUALITY ASSURANCE A. CONTRACTOR shall be responsible for all inspection of plant material required by the Public Authorities having jurisdiction, and shall secure required permits. 1.5 DELIVERY, STORAGE AND HANDLING A. Fertilizer shall be delivered to the job in manufacturer's original, unopened containers, with labels intact and legible. B. Seed shall be delivered in suitable sealed containers labeled in accordance with applicable laws and regulations and including name and location of the producer. C. Protect seed from moisture prior to use. 1.6 SCHEDULING A. All disturbed areas shall be stabilized with temporary or permanent soil cover within the time limits specified in Section 01563 DEWATERING, EROSION, AND SEDIMENT CONTROL. 1.7 MAINTENANCE A. Areas seeded with seed mix, shall be moist when seeded and shall be kept moist by sprinkling until a good stand of grass is obtained and until the work is accepted by the COUNCIL. Newly seeded areas shall be mulched. Mulch materials shall be as specified elsewhere in this Section. Apply mulch uniformly at a rate which will provide adequate cover to protect seeds and prevent washing but will not hinder the growth of the grass. B. Sod shall be watered and maintained by the CONTRACTOR for a period of six weeks/until acceptance by the COUNCIL, except that no maintenance will be required between November 15 or freeze-up, whichever is earlier, and April 15. The CONTRACTOR will mow the new sod during the maintenance period, as may be needed until acceptance by COUNCIL. The CONTRACTOR, at a time before the MCES Project No. 807810 Landscaping Contract No.13P219 02900A-2 Metropolitan Council Environmental Services St Croix Valley WWTP Aeration Piping Modifications and Outfall Repairs first mowing and as directed by the COUNCIL, shall remove pegs. 1.8 WARRANTY A. Turf seeding areas shall be subject to a full one year warranty beginning upon acceptance of the total project by the COUNCIL. Defective workmanship or materials as identified by the following procedures shall be repaired as directed, at no additional cost to the COUNCIL. B. Materials evidencing satisfactory growth at the applicable inspection tour will be accepted. The CONTRACTOR shall not be responsible for damage or poor growth due to lack of maintenance after the specified maintenance period. C. Seeded Turf. At the conclusion of the first growing season after planting, an inspection of turf will be made to determine its condition. Bare patches in excess of one square foot, and other defects, as determined by the COUNCIL, will be noted. Overseeding, during the next available planting season, shall be done by the CONTRACTOR at his own expense as may be necessary to obtain a satisfactory stand of grass. D. Sod. Displaced or dead sod, from any cause, which shall appear within the first year after acceptance, shall be considered defective. Defective sodding shall be replaced promptly by good work. 1.9 DEFINITIONS A. Inside the WWTP fence: All project areas west of the access gate located near EX. MH5. (A1-16A) 1-8 B. Outside the WWTP fence: All project areas east of the access pate located near EX. MH5. (A1-168) PART 2 - PRODUCTS 2.1 FERTILIZER A. Fertilizer applied to Sod and to seeding areas shall by Type 3 (slow release) fertilizer as described in Mn/DOT Spec. 3881. Fertilizer shall be analysis 22-5-10 at 350 pounds per acre or equivalent. 2.2 SOD A. Sod shall be densely rooted blue grass, free from noxious weeds and substantially free of other weeds and objectionable grasses. Sod shall be lawn type in accordance with Mn/DOT Spec. 3878. At least 2/3 of the grasses, as determined by the initial planting mix, shall be elite type Kentucky Bluegrasses, as defined in Mn/DOT Spec. 3876.2C. Before cutting, the sod shall be raked free of all debris, and the grass cut to a length of about two inches. The thickness of the sod shall be uniform and such as to contain practically all of the dense root system of the grasses, and not less than 3/4". Sod shall be cut in uniform strips not less than 12" wide and not less than 24" in length, and shall be placed within 48 hours of cutting. Sod strips shall not have dry or dead edges. MCES Project No. 807810 Landscaping Contract No.13P219 02900A-3 Metropolitan Council Environmental Services St Croix Valley WWTP Aeration Piping Modifications and Outfall Repairs 2.3 SEED A. Seed mix shall be Mn/DOT Mixture 310 as defined in Mn/DOT Spec. 3876, applied at 100 pounds per acre. 2.4 WATER A. Water shall be potable (or as otherwise approved) and shall be suitable for plant growth. 2.5 TOPSOIL Topsoil Borrow, shall conform to Mn/DOT Spec. 3877.2A. 2.6 MULCH A. Mulch shall be Type 5 Hydromulch conforming to Mn/DOT Spec 3884. 2.7 EROSION CONTROL BLANKET A. Erosion control blanket shall conform to Mn/DOT Spec. 3885. B. Erosion Blanket shall be all natural netting and stitching. 2.8 TREE PROTECTION FENCING A. Tree protection fencing shall be orange plastic construction fencing secured to steel posts located at changes in direction with a maximum spacing of 8 feet. 2.9 TREE REPLACEMENT SAPLINGS A. Sapling of the following flood plain forest specie_is suitable for the St. Croix River floodplain: Big tooth aspen, cottonwood, hackberry, whamp white oak, black walnut, red and silver maples, and black willow. 2.10 PREDATION REPELLANT CHEMICALS A. Plantskydd Deer Repellant B. Deer Out Repellent C. Nott Growing Season Animal Repellent D. DeerPro Repellent PART 3 - EXECUTION 3.1 PREPARATION FOR SEEDING AND SODDING MCES Project No.807810 Landscaping Contract No.13P219 02900A-4 Metropolitan Council Environmental Services St Croix Valley WWTP Aeration Piping Modifications and Outfall Repairs A. Finished grades shall slope uniformly between elevations shown as applicable. Allow for the thickness of sod, as applicable. The finished work shall be true, smooth and sightly. Spread smooth, but do not compact. B. A minimum of six inches of topsoil shall be placed on all areas to be sodded. In seeded wetland areas, upper two feet of native material must be reused. In areas to be sodded, topsoil borrow shall be provided. All costs to furnish and place topsoil, whether salvaged or borrow, shall be incidental to seeding or sodding and no additional compensation will be made there for. C. The topsoil shall be loosened and thoroughly pulverized by discing, harrowing or hand raking. Sticks, stones, and trash over one inch, shall be removed. The surface shall be finished to the designated slope and contour. Spread the fertilizer and work in during preparation. Apply fertilizer in two passes at approximately right angles to each other, each pass placing approximately half of the fertilizer. Application rate shall provide the plant food quantities specified in Article 2.1 of this Section. 3.2 SODDING A. All disturbed areas inside the WWTP fence shall be sodded. B. Immediately before the sod is laid, the prepared bed shall be sprinkled until all of the loose material is moist. Sodding shall be done only when soil and weather conditions are favorable. The sod strips shall be carefully placed by hand beginning at the toes of the slopes and progressing upwards, the length of the strips as nearly as practical at right angles to the direction of the flow of the surface water. All joints shall be tightly butted and the end joints shall be staggered at least 12 inches. After sod has been placed, the sod shall be pressed into the underlying soil by rolling or tamping. The sod shall be pegged with suitable wood stakes as necessary to keep it in place. 3.3 SEEDING A. All disturbed areas outside the WWTP fence shall be seeded. B. Seeding shall be done between April 1 and June 1 or between July 20 and September 20, except as otherwise may be allowed by the CAR. In any case reseeding shall be done as may be necessary to obtain a satisfactory stand of grass. Sow seed uniformly at 100 pounds per acre, adjusting for the certified purity and germination. C. Seeds are to be sown by hydro-seeding. Seeding shall be performed in two passes at approximately right angles, each pass placing approximately half of the seed. D. Immediately before seeding, the soil shall have been properly prepared for seeding. Immediately after the seed has been sown, the entire area shall be raked lightly and rolled lightly to pack the soil firmly around the seed. E. Mulch newly-seeded areas with Type 5 Hydromulch at a rate of 80 cubic yards per acre. F. Where indicated, and at ditches, provide erosion control fabric over newly seeded areas to prevent erosion. Install in accordance with the manufacturer's instructions, including also types and spacing anchors. MCES Project No. 807810 Landscaping Contract No.13P219 02900A-5 Metropolitan Council Environmental Services St Croix Valley WWTP Aeration Piping Modifications and Outfall Repairs 3.4 TEMPORARY SEEDING A. Temporary seeding shall be provided as necessary to meet erosion control requirements in the specifications and permits. B. Temporary seed mix shall be Mn/DOT Mixture 110 as defined in Mn/DOT Spec. 3876. C. No separate payment will be made for temporary seeding, the cost thereof shall be considered incidental to the prices of the bid for various contract items. 3.5 TREE PROTECTION FENCING A. Place tree protection fencing around trees not identified for removal near the work area prior to beginning the work. Fencing shall be placed at the drip line or as close as possible to the drip line while allowing the necessary work access. 3.6 TREE REPLACEMENT SAPLINGS A. The contractor will plant 500 saplings per acre of disturbed area outside of the WWTP fence. The proposed species will be based upon availability. B. Recommended spacing shall be a 9 foot by 9 foot grid of trees. Grid shall be adjusted so that no tree is planted within 8 feet of the centerline of the new outfall pipe. C. Newly planted tree saplings shall be protected from deer and rabbit predation by a one-time application of a chemical repellent indicated above, applied per manufacturers recommendations. END OF SECTION MCES Project No. 807810 Landscaping Contract No.13P219 02900A-6 0 F Z Q 1 J C) --,, 1 Ili (NI N Z a. 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' / 0 E9 H m O o alai /C i tl, : I+ O M1 SB't0i1 b , _.. _ 1' ..r� Z 5 E �`i _ I r/ I 1 w a , M b i w 1 ,( 1 p .._ } N f v '' w _, 3 1y. 1 xx MTZU.y I p m : iL gLL ' 3 . 0°000. E g ' �fa 1 M5 . g af. 2/. 66 . *z8 I [W z z o o ? a S w w rca 6J W 1 MORKMM SW Mar,11S-P6,1.33115.211tle132111V6,1001..01.01.011 Mead N01.01.,0141.0.60/NOMMVALOGLSOOMION00013MV,001 A AECOM 612.376.2000 tel 800 LaSalle Avenue,Suite 110 612.376.2271 fax Minneapolis,MN 55402 January 24,2014 Mr.Timothy Amstutz Metropolitan Council Environmental Services 390 Robert Street North St. Paul,Minnesota 55101 Subject: Geotechnical Engineering Services for the St.Croix WWTP Outfall Pipe Replacement in Oak Park Heights,Minnesota-AECOM Project No.60312946 Dear Mr.Amstutz, This letter report summarizes the results of the subsurface exploration and laboratory testing program completed by AECOM Technical Services, Inc.(AECOM)for the above mentioned project. The following letter contains the logs of two(2)soil borings completed within the project area and our evaluation of the subsurface conditions encountered. Background We understand that Metropolitan Council Environmental Services(MCES)is proposing to remove and replace approximately 400 feet of 36-inch Reinforced Concrete Pipe(RCP)at the MCES existing St. Croix Valley Waste Water Treatment Plant(WWTP)in Pak Park Heights, Minnesota. The proposed 36-inch RCP will have the same horizontal alignment as the existing pipe, but the vertical alignment will differ.Construction will occur just to the east of MH-3.The proposed pipe will be at the same vertical alignment at both ends; however the pipe may be up to 3 feet deeper than the existing pipe at the existing headwall location. The invert elevation at MH-3 is 679.92 feet and the outfall elevation in the river is approximately 670.0 feet. The existing ground surface coverage over the pipe varies. The storm water exits the WWTP heading north from the diversion structure then makes a 90-degree turn at existing manhole MH-5. The pipe runs through a series of manholes for approximately 540 feet east and then discharges in the St. Croix River. Demolition of the project includes an existing concrete 6-foot by 5-foot box manhole,approximately 400 feet of pipe,and the existing headwall. Procedures Borina Layout Procedures Two(2)soil borings,B-1 and B-2,were completed by a two man STS Enterprises, LLC(STS)drill crew under subcontract to AECOM as part of the geotechnical exploration program.The borings were performed on January 1,2014 with an ATV-mounted drill rig. STS surveyed the boring locations using the top of the manhole casting(elevation 679.27 feet)near the project area as a benchmark.The elevations are referenced to the North American Vertical Datum of 1988(NAVD 88).The borings were advanced using hollow stem augers. The borings were extended to depths ranging from 18.3 to 18.5 feet below ground surface. 60312946 St Croix-final.docx AECOM 2 The boring locations were selected by AECOM and located in the field by STS. STS cleared public utilities through Gopher State One Call. The locations of the borings are presented on the Soil Boring Location Diagram included in the Attachments. Drilling and Semolina Procedures Representative soil samples were obtained by means of split spoon sampling procedures in general conformance with ASTM Standard D-1586. The Standard Penetration Test(SPT)resistance was based on the blows required to advance the sampler over two successive 6-inch intervals after an initial 6 inch set. Soil sampling was generally performed at 2.5 foot intervals to the boring termination depths. Samples obtained in the field were logged,labeled,sealed,and brought to our laboratory for further examination and testing. During the field operations,the drilling crew maintained a written log of the subsurface conditions encountered,including changes in the stratigraphy and observed groundwater level. Groundwater was encountered about three feet below ground surface in borings B-1 and B-2,corresponding to elevations 678.8 to 676.8 feet,respectively. The river elevation was surveyed at an elevation of 674.7 feet at the time of drilling. Laboratory Testing Procedures The laboratory testing program consisted of performing routine visual classification and moisture content testing on representative portions of recovered samples. The relative density of the granular soil deposits was evaluated in-situ through the Standard Penetration Test(SPT). Cohesive soil samples were not encountered. The results of the laboratory tests are shown on the individual soil boring logs included in the attachments. In conjunction with the laboratory testing program,each soil sample was visually classified on the basis of texture and plasticity in general accordance with the AECOM Soil Classification System. The estimated group symbol included in parentheses following the soil descriptions on the boring logs is in general conformance with the Unified Soil Classification System which serves as the basis of the AECOM Soil Classification System. A brief explanation of the classification of soil samples is included in the attachments. Borina Loa Procedures and Qualifications General soil descriptions were noted on the individual boring logs included in the attachments. Please note that the strata contact lines represent approximate boundaries between soil types;the actual transition between soil types in the field may be gradual in both the horizontal and vertical directions. Subsurface conditions and water levels at other locations may differ from the conditions encountered at the boring location. Furthermore,the subsurface conditions may change over time. These variables need proper consideration when utilizing the information presented on the boring logs. K NProjects160312946-MCES St.Croix W00-TECHNICAL\401-Geotechnicallreport and attachments\60312946_St Croixfinal.docx AECOM 3 Results Soil Profile The subsurface profile was similar between the two borings. A thin surficial layer of sand on the order of 6 inches thick was encountered in both borings from a depth of 0 to 0.5 feet. Underlying the sand, moderately organic clayey silt was encountered to depths ranging from 4 to 4.5 feet. Native silty fine sand was encountered underlying the moderately organic clayey silt to the boring termination depth of boring B-1,and to a depth of 15 feet in boring B-2. Fragments of weathered sandstone were encountered in the silty fine sand layer in both borings at depths ranging from 6.7 to 8 feet. The sandstone became more cemented below a depth of 10 feet in boring B-1 and below 15 feet in boring B-2. Refer to the individual boring logs in the attachments for specific information. It should be noted that the stratification lines indicated on the boring log were selected on the basis of laboratory tests, field logs,and visual observations of the recovered samples. The stratification lines that occur on the boring log are in some cases estimated; in-situ,the transition between soil types in both the horizontal and vertical directions may be gradual. Groundwater Conditions Groundwater was encountered in both of the borings at a depth of 3 feet. Since the soils encountered in the subsurface exploration program consist of relatively free draining granular deposits, it is our opinion that these measurements represent a reasonable estimation as to the depth of the local water table. In addition,the water level along the bank of the river was surveyed at the time of drilling at 674.7 feet. Groundwater level fluctuations may occur with time and seasonal change due to variations in precipitation,evaporation,surface runoff, neighboring pumping, local dewatering,and especially the close proximity to the river. Analysis and Recommendations Construction Considerations Based on information provided to AECOM by TKDA,the proposed pipe will follow essentially the same horizontal alignment as the existing pipe, but will vary in vertical alignment. The proposed pipe will be at the same vertical location at the upstream end point,679.9 feet at MH-3, but up to three feet deeper than the existing pipe at the existing headwall location,where the proposed outlet invert is 670.0 feet. Based on the soil encountered in the soil borings,we anticipate that the pipe will be bedded on the medium dense silty find sand. The pipe should not be allowed to be bedded on the moderately organic deposits. We anticipate minimal over excavation will be required. Based on water levels encountered in the soil borings,it is anticipated that the excavation for the proposed outfall pipe will extend up to several feet below the groundwater table. We anticipate significant seepage of water will be encountered in the excavation through the near surface moderately organic soils and the underlying water bearing granular layers. Any water should be removed from the excavation as soon as practical to prevent the softening of the subgrade soils. Well points may need to be installed to temporarily draw down the water table to control the amount of seepage into the excavations if sump pits and pumping are not adequate for dewatering the utility excavations. To install the piping in the river in dry conditions,a coffer dam may need to be installed around the outfall. KAProjects160312946-MCES St.CroiA400-TECHNICAL4401-Geotechnical\report and attachments160312946_St Croix4inal.docx AECOM 4 Over excavation,if necessary, below the pipe inverts should be backfilled with 3/4-inch clear stone used for bedding. It may be necessary to place a geotextile in the overexcavated areas to prevent a migration of fines into the open graded stone. In this case,the geotextile should consist of a non- woven fabric with an Apparent Opening Size(AOS)in the range of 70 to 100. Over excavation will only be required if soft or loose soils are encountered or if water accumulates in the base of the excavation which softens the subgrade soils. Excavations should not proceed until the area has been adequately dewatered. All construction and pipe installation should be performed in accordance with Metropolitan Council Standards. All excavations should be free of standing water prior to the placement of bedding stone. Backfill of the pipe trench should be performed in conformance with the Metropolitan Council Standard Specifications. Excavated granular materials can be reused as backfill above the pipe assuming they are free of organic materials, debris,and environmental impairment. The proposed outfall piping will be constructed below vegetative land along the majority of the alignment. We recommend all backfill is compacted to a minimum of 92% of the modified Proctor maximum dry density. We recommend that an AECOM Geotechnical Engineer or qualified representative be present on a full-time basis during installation of the RCP outfall piping to observe and document conditions and to evaluate whether subgrade conditions are similar to those anticipated by the design team. Excavations are anticipated to extend to depths of 4 to 12 feet below ground surface. All excavations which extend greater than 5 feet in depth should be designed in accordance with OSHA regulations and any other applicable state or local requirements with properly sloped or braced sides to prevent excavation instability. Excavation safety is the responsibility of the contractor. All excavation support systems should be designed by a licensed professional engineer in the state of Minnesota. We recommend that temporary excavation sides be planned with a slope of 1.5H:1 V or flatter,or properly shored. Stockpiles of material or equipment should not be placed near the top of excavation slopes. General Qualifications General Qualifications applicable to subsurface exploration are attached and are an integral part of this report. This report has been prepared in accordance with generally accepted soil and foundation engineering practices to aid in the evaluation of this property and to assist the owner and the architect and/or engineer in the design of this project. No other warranty,expressed or implied is made. The scope of this report is limited to the specific project and location described herein, and our description of the project represents our understanding of the significant aspects relevant to soil and foundation characteristics. We recommend that AECOM be provided the opportunity to review the final project plans and specifications to confirm that the recommendations contained in this report have been interpreted in accordance with our intent. AECOM should be retained to observe and verify that the foundation bearing strata are consistent with the findings of this report. Without this oversight and special testing,we cannot be responsible for misinterpretations of our data,our analyses,and/or our recommendations,or how these items are incorporated in the final design. K:\Projects160312946-MCES St.CrobA400-TECHNICAL4401-Geotechnicallreport and attachments160312946_St Croix-final.docx AECOM 5 We appreciate this opportunity to be of service to you. If there are any questions with regard to the information contained in this report,or if we may be of further assistance,please contact us. Respectfully, AECOM Technical Services, Inc. annon R. en "'!+'�!' a Th• as, P.E. Assi t Project Engin Project Engineer u A. arvin, P.E. Principal Engineer Attachments: Soil Boring Location Diagram Soil Boring Logs AECOM Soil Classification System AECOM Earthwork Guideline General Qualifications K:1Projects160312946-MCES St.Croix1400-TECHNICAIA401-Geotechnicaltreport and attachments160312946 St Croix-final.docx Lad Yvan by KYLESI(201401-20) Last Monet 201401.20 Project Marcpmr t INlae: Designer.— Checked.— Approved— ANSI A 8.5 x It' tLL18OSN1FP001N2PROJECTSIPROJ rS 1 yCES ST CROIKMOO-T vE*R a 93 Er a o pm r` . 0 p— oR' m w O - N 0 ac sa p °� wix xix�arnm B-1 ' ui+mo. 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"`"" ° i $B-2 A � 5 1 C 73 m CLIENT LOG OF BORING NUMBER B-1 /� MCES A;COM PROJECT NAME ARCHITECT-ENGINEER St.Croix Valley WWTP AECOM SITE LOCATION <>UNCONFINED COMPRESSIVE STRENGTH 1 2 3 4 5 • I I , E w PLASTIC WATER UOUID Ig UMri% CONTENT% UMIT% z w DESCRIPTION OF MATERIAL X-----•-----6 gF i r 10 20 30 40 50 Zi w w w $ - c w a a a Q STANDARD X Uzi SURFACE ELEVATION +681.8 g ® PENETRATION BLOWS/(FT) 10 20� 30 40 50 I ]::0.5 Silty fine to coarse sand-black-wet(SM) 1 1 AS —— Organic clayey sift-little sand-trace roots-light brown 1 - — and black-loose-wet(OL) 1 _= 1 —ZS— HS —_ 1 2 SS -= k 4.0 , Silty fine sand-reddish brown-medium dense-wet 5.0 HS (SM) , •,46 t 3 SS , / X7;5 HS •/ 8.0 �. 4 Silty fine sand-trace fine to coarse weathered • '9. sandstone gravel-tan-medium dense-wet(SM) I I 10.x- 10.0 I . HS Silty fine sand-trace fine to coarse sandstone-tan- I extremely dense-wet(SM) I j♦ •.. _r0/0.4' 5 SS 11.` T` � 1 HS I I — — `. `. I ®50/0.5' 6 SS L:. .. rise— I 1 HS 1 1 �/p • ® •6' 7 SS 1 17.5 HS -18.5— 8 SS I 18.5 • 6 End of Boring Boring advanced from 0 to 18.5 feet with hollow stem a auger Q Standard Penetration Tests performed with Automatic I- hammer O e 3 o1 co LL R a 0 The stratification lines represent the approximate boundary lines between soil types: in situ,the transition may be gradual. iNORTHING BORING STARTED AECOM OFFICE Oshkosh,Wisconsin �7 111M4 o EASTING BORING COMPLETED 1MI14 ENTERED BY SHEET NO. 1 OF 1 SWL RIGIFOREMAN APP'D BY AECOM JOB NO. 3.0 ft.WS 750/Dennis Zehnder JMT 60312946 CLIENT LOG OF BORING NUMBER B-2 AC MCES PROJECT NAME ARCHITECT-ENGINEER St.Croix Valley WWTP AECOM SITE LOCATION UNCONFINED COMPRESSIVE STRENGTH 1 T .2 3 4 5 I I I I , w PLASTIC WATER LIQUID LIMIT% CONTENT% LIMIT% LL ° o DESCRIPTION OF MATERIAL — •——— ———— i < z o 10 20 30 40 50 �i W Iii w ' I I o Si a t . STANDARD X _a arc SURFACE ELEVATION +679.8 3 9 10 PENETRATION B OWSKFT► 0.5 Driller's note:Sand(SP) 1 __ -moist Organic clayey silt-trace sand and roots-black-very / _— soft ist(OL) / - — / 2.5 HS ` — I =— / 2 SS =— 4 • / 5i HS • --4.5 Silty fine sand-brown-medium dense-wet(SM) \ j `�4 V 3 SS 6.7 Silty fine sand-trace weathered white sandstone- 1 I 7.5 HS reddish brown-medium dense-wet(SM) .''t I 9 4 SS 9.0 • Silty fine sand-trace gravel and weathered rock chips- I 10.0 HS light brown-very dense to extremely dense-wet(SM) / Note:very friable sandstone 11 5 SS T ` I HS 1 S 6 SS I I : • • 155.0- 15.0 ■ HS Fine-grained white sandstone-saturated-highly weathered 0.5' 7 SS I -I-:::::: 0 17.5 HS / 18.3 a ss 1 18.3 i) 050/0.3' End of Boring Boring advanced from 0 to 18.3 feet with hollow stem o auger 4 Standard Penetration Tests performed with Automatic r hammer 8 e I The stratification lines represent the approximate boundary lines between soil types: in situ,the transition may be gradual. i NORTHING BORING STARTED AECOM OFFICE Oshkosh,Wisconsin 1/1114 BASTING BORING COMPLETED ENTERED ENTER D BY SHEET NO. 1 OF 1 WI- APPD BY AECOM JOB NO. < 3.0 ft AB 750/Dennis Zehnder JMT 80312946 AECOM 1 AECOM Soil Classification System (1) Major Group Typical Names Laboratory CloesifiCation Criteria Divisions Symbols IIi cw or nllellgro-gn .ngidured, sal. $ Cu- greater man 4: Ca-Dm �etwem I h 3 oc v�1 I C�I g i $ GP Koval-��m6durae. . Not meeting all gradation requirements for Ow g E w I fktls or fines n g i a a 3 ° !! Shy gravel, gravel-sand- Aber a C 0M silt mixtures i Nns or M Mee tMaw4 A• Above A Ins with PI between 4 and 7 4 1 I §14�1 i are borderline . .Y cases requiring we II IA 1 - CC clay C gravel-sand- 2 2114 I AA r or ,1 MTMe a i" T of dual symbol. le — Milli--ilralled sand, iris osar red. 9 $g C greater than e: qc- D, Dapetween 1 & 3 Die s 1 ill 1: SW s Poorly graded sand.gravely 's Si . . g t i SP sand. Me or no fins Not meeting all gradation requirements for SW*" /1"1: I ib1 1= 2 g S14r sand. send-alt w•- berg Molts below 'A' • ski mlxbrres g 6 c flee or PI lea than 4 haired zoneg lwi h PI 7 /S r g $ N between 4 and 7 a are borderline A ofdu a r 1 SC Clayey sand, sand-clay 8 i lea or PI limits above 7 of dual mbdures line Inorganic dit and wry fine Plasticity Chart ML mind. rock flour. silly or if R aloyey fine sand or clayey 80 silt with sight PAY For classification of fine-grained soils and fine fraction of YInorg c a1oy of low to coarse-grained soils. Y. CL clay. sandyp dyy. p-revely 50 Atterberg Limits plotting s, cloy. lean day ��Y in hatched areas are CH or OH borderline claalflcatbns 4 v requiring use of dual Q 3" OL 0!pak eh and organic v 40-symbols. Alli.......1.11111W 3r emf' airy of low Pia db° Equation of A-Me: i I PI-0.73 (LL-20) —� •41� @I I nic elk micaceous 30---- - 4 `o MH crr silty s b. N fine sandy [ —r I--�' $ or Mlty sale, elastic silt i I ' MH or OH T. II — I 1 Inorganic clay of high I 8 o CH plasticity. fat clay I CL or OL "111.MIMI T1 411 OH Organic clay of medium to 10---- g high plane organic slit 4• .∎V: J%���� L or)OL c is soil other highly 00 10 20 30 40 50 60 70 a0 90 100 �= Liquid Limit (LL) 1. See AECOM General Notes for component gradation terminology,consistency of cohesive soils and relative density of granular soils. 2. Reference:Unified Soil Classification Systems 3. Borderline classifications,used for soils possessing characteristics of two groups,are designated by combinations of group symbols. For example:GW-GC,well-graded gravel-sand mixture with clay binder. AECOM AECOM Earthwork Guidelines Fill or backfill required on the project should consist of a non-frozen, non-organic granular material, aggregate or natural soil that is free of debris and particles larger than 25 percent of the loose lift thickness. The natural water content of cohesive fill soil at the time of compaction should generally be within-2 to+4 percent of the optimum water content determined by the proctor test. Difficulty in obtaining the desired degree of compaction is expected for soil that is too dry or too wet.The water content should be adjusted by sprinkling if too dry or by scarifying and aerating if too wet. Blending with an additive such as fly ash or drier soil may also help produce an acceptable water content. Fill or backfill which is relatively uniform should be used on the project. Non-uniform materials or mixing two or more materials will reduce the degree of certainty in the test results and will tend to cause variable compressibility of the fill. Fill or backfill should be placed on a firm,checked subgrade in horizontal lifts with a loose thickness not greater than 12 inches for granular material and 9 inches for cohesive soil. It should then be compacted with equipment that is suited to the soil type and compaction requirements. Normally,vibratory roller or plate compactors are better suited for granular soils,while a sheepsfoot or other"kneading"type of compactors are more effective in cohesive soils. Lighter,hand-propelled compactors should generally be utilized to compact backfill within 5 feet of structures unless the structure is designed to resist expected lateral pressures from use of heavier compactors. When using lighter, hand-propelled compactors, a maximum loose lift thickness of 8 inches should be used for granular material and 6 inches for cohesive soil. Unless stated otherwise in the report text,fill or backfill that supports foundations,floor slabs that are loaded in excess of 400 psf,and roadway pavement that is subjected to concentrated automobile or truck traffic should be compacted to a dry density of 95%or more of the maximum dry density determined by modified Proctor tests(ASTM D-1557)on representative samples of the fill material. Fill or backfill that supports lightly loaded floor slabs, sidewalks or pavement that is subjected to dispersed automobile traffic should be compacted to a dry density of 90%or more of the maximum dry density determined by modified Proctor tests on representative samples of the fill material.Compaction tests may be considered satisfactory if the average of five consecutive tests on similarly compacted material exceeds the required compaction and no individual test is more than 2%below the required percentage of compaction. Proper compaction is generally difficult to achieve near the edge of a slope or embankment fill due to lack of confinement. For this reason,we recommend that the compacted fill or backfill zone extend horizontally beyond the edge of foundations a minimum of 1 foot at the subgrade level and then with depth at a minimum slope of 1 horizontal to 1 vertical. Fill material acceptability,subgrade preparation and testing for suitability,fill placement and fill compaction should be monitored continuously or at least regularly by a qualified soils technician whom reports to the geotechnical engineer for the project.Compaction density for structural fill should be tested at a minimum frequency of once per 5000 ft of fill area or once per 200 yd3 of compacted material placed unless stated otherwise in our report. In non-structural fill areas,testing frequencies may be reduced in half. AECOM AECOM General Qualifications Underground Engineering This report has been prepared in general accordance with normally accepted geotechnical engineering practices to aid in the evaluation of this site and to assist our Client in the design of this project. We have prepared this report for the purpose intended by our Client,and reliance on its contents by anyone other than our Client is done at the sole risk of the user. No other warranty, either expressed or implied, is made. The scope is limited to the specific project and location described herein,and our description of the project represents our understanding of the significant aspects relevant to the geotechnical characteristics. In the event that any changes in the design or location of the facilities as outlined in this report are planned,we should be informed so that the changes can be reviewed and the conclusions of this report modified as necessary in writing by the geotechnical engineer. As a check,we recommend that we be authorized to review the project plans and specifications to confirm that the recommendations contained in this report have been interpreted in accordance with our intent. Without this review,we will not be responsible for the misinterpretation of our data,our analysis,and/or our recommendations,nor how these are incorporated into the final design. The analysis and recommendations submitted in this report are based on the data obtained from the soil borings performed at the locations indicated on the location diagram and from the information discussed in this report. This report does not reflect any variations which may occur between the borings. In the performance of subsurface explorations,specific information is obtained at specific locations at specific times. However, it is a well-known fact that variations in soil and rock conditions exist on most sites between boring locations and that seasonal and annual fluctuations in groundwater levels will likely occur. The nature and extent of variations may not become evident until the course of construction. If variations then appear evident,it will be necessary for a re-evaluation of the recommendations contained in this report after performing on-site observations during the construction period and noting the characteristics of the variations. The geotechnical engineer of record is the professional engineer who authored the geotechnical report. It is recommended that all construction operations dealing with earthwork and foundations be observed by the geotechnical engineer of record or the geotechnical engineer's appointed representative to confirm that the design requirements are fulfilled in the actual construction. For some projects,this may be required by the governing building code. The scope of services for this project does not include either specifically or by implication any environmental or biological(e.g., mold,fungi, bacteria,viruses,and the byproducts of such organisms) assessment of the site,or identification of or prevention of pollutants, hazardous materials or conditions. Other studies beyond the scope of this project would be required to evaluate the potential of such contamination or pollution. Metropolitan Council Environmental Services StO rmwater Pollution Prevention Plan St Croix Valley Wastewater Treatment Facility 6163 St Croix Trl N, Oak Park Heights, MN 55082 r ., _ -.a s t r r ' ._ i \ iik - I} Metropolitan Council Environmental Services, 390 Robert St. N.,St. Paul, MN 55101-1805 (651)602-1000, TTY(651)201-0904,www.metrocouncil.org This material can be made available in alternative formats for people with disabilities. r 1 Stormwater Pollution Prevention Plan (SWPPP) MCES-St Croix Valley WWTF Permit ID Number: MNR0535M5 Certification and Management Approval Metropolitan Council Environmental Services(MCES)has prepared this Stormwater Pollution Prevention Plan(SWPPP)in accordance with the requirements of the National Pollutant Discharge Elimination System/State Disposal System(NPDES/SDS)permit No. MNR050000 for the discharge of stormwater from facilities identified in 40 CFR 122.26(bxl4Xi)through(ix)and(xi). Full approval is extended by Management at a level with authority to commit the necessary resources. I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system,or those persons directly responsible for gathering the information,the information submitted is,to the best of my knowledge and belief,true,accurate,and complete. I am aware that there are significant penalties for submitting false information,including the possibility of fine and imprisonment for know' g violations. William G.Moore,Manager Metropolitan Council Environmental Services Division Date: Contents Certification and Management Approval 2 Introduction 6 Purpose of this Plan 6 Plan Accessibility 6 Part 1. Pollution Prevention Team 1.1 Contact Information/Responsible Parties 7 1.2 Stormwater Pollution Prevention Team 7 Part 2. Facility Description 2.1 Facility Information 10 2.2 Facility Discharges&Receiving Water 10 Table 1.Appendix A Waters within 1 mile ofBMLs 2.3 Facility Activities 12 Part 3. Facility Map 3.1 General Location Map 14 3.2 Site Map 14 Figure 1. General Location Map:MCES-St Croix Valley WWTF Figure 2.Site Map:MCES-St Croix Valley WWTF Part 4. Potential Pollutant Sources 4.1 Industrial Activity and Associated Pollutants 19 Table 2.Significant Materials and pollutants associated with industrial activity Part 5. Stormwater Control Measures 5.1 Good Housekeeping 23 5.2 Eliminating and Reducing Exposure 24 Table 3.Industrial Activities,associated Significant Materials and BMPs 5.3 Salt Storage 32 5.4 Erosion Prevention and Sediment Controls 33 5.5 Management of Runoff 33 5.6 Facility Inspection 34 5.7 Maintenance of BMPs and Equipment Preventive Maintenance 34 5.8 Elimination of Unauthorized Non-Stormwater Discharges 34 5.9 Spill Prevention and Response 34 5.10Mercury Minimization Plan 34 5.11Employee Training Program 35 MCES—June 2014 Revision St Croix Valley WWTF SWPPP Page 3 r II Part 6. Inspections III 6.1 Persons Responsible 36 6.2 Schedule for Conducting Inspections 36 6.3 Specific Areas to be Inspected 36 Part 7. BMP Maintenance 7.1 Maintenance of BMPs 38 7.2 Equipment Preventive Maintenance 38 Part 8. Non-Stormwater Discharge Verification 8.1 Date of Evaluation 39 8.2 Description of Evaluation Criteria Used 39 8.3 List of Outfalls/On-Site Drainage Used for Verification 39 8.4 Different Types of Non-Stormwater Discharge(s) 39 8.5 Actions Taken to Eliminate Unauthorized Discharges 39 Part 9. Spill Prevention and Response Procedure 9.1 Spill Containment/Response Equipment Location 40 9.2 MCES Spill Response Procedure 40 9.3 Plant-specific Emergency Procedures 41 9.4 SPCC Planning 41 Part 10. Mercury Minimization Plan 10.1 Ultraviolet Disinfection Lamps 42 10.2Fluorescent Lamps 43 10.3 Untreated or Partially Treated Sewage 43 Part 11. Employee Training Program 44 Part 12. Impaired Waters/TMDL5 12.1Impaired Waters Listing and Status 45 12.2Appendix A Waters 46 Part 13. SWPPP Modifications 47 Table 4.Log of SWPPP Revisions Part 14. Schedules and Procedures for Monitoring 14.1Benchmark Monitoring 48 Table 5a.Sampling Data Summary-BML01 Table 5b.Sampling Data Summary-BML02 Table 5c. Sampling Data Summary-BML03 Table 5d Sampling Data Summary-BML04 Table 5e. Sampling Data Summary-BML05 Table 5f Sampling Data Summary-BML06 Table 5g. Comparison of Averaged Benchmark Values and Sector T Threshold Values 14.2Effluent Limitations Guidelines Monitoring 52 14.3Impaired Waters Monitoring 52 MCES-June 2014 Revision St Croix Valley WWTP SWPPP Page 4 a List of Attachments Attachment A. General Location Map Attachment B. Site Map Attachment C. Verification of Permit Coverage Attachment D. Inspection Checklist and Inspection Documentation Attachment E. Annual Report Form t MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 5 1 5 Introduction Metropolitan Council Environmental Services(MCES),an operating division of the Metropolitan Council,owns and operates seven wastewater treatment facilities(WWTF)throughout the Twin Cities Metropolitan Area. Industrial waste and the vast majority of homes in the Metropolitan Area are connected to one of the MCES treatment plants through an extensive collection system. The primary Standard Industrial Classification(SIC)at MCES facilities is 4952: Sewerage Systems. The MCES-St Croix Valley WWTF(Facility)is required to obtain permit coverage in 40 CFR 122.26(bxl4Xix),as the Facility is a municipal wastewater treatment plant with a design flow greater than 1.0 mgd. This Facility falls into Sector T:Treatment Works of the General Industrial Stormwater Permit MNR050000(Permit);the facility specific permit identification number for stormwater discharges from this Facility is MNR0535M5. This Facility is not eligible for the"no exposure certification",as not all significant materials and/or activities at the Facility are under cover. Purpose of this Plan The primary purpose of the Stormwater Pollution Prevention Plan(SWPPP or Plan)is to: • identify pollutants at the industrial facility that could potentially come into contact with stormwater; • minimize the potential for contact;and, • mitigate any contact prior to being discharged from the industrial site. This Plan complies with the requirements of the federal and state stormwater requirements to develop a SWPPP and document revisions. Documentation pertaining to required stormwater inspections,monitoring,and employee training are provided with this Plan. Plan Accessibility This Plan must be kept available at the facility and made available to the MPCA within 72 hours of a request for a review(Minn.R. 7090.3040,subp. 2). In addition,this Plan must be readily accessible to the Stormwater Pollution Prevention Plan Team Members identified in Part 1.2 of this Plan,either in an electronic or paper format. The most recent version of this Plan is maintained electronically on the MCES intranet site at: http://metnet/es/eqd/ec/SitePages/StCroixValleyPlansForms.aspx. MCES—June 2014 Revision St Croix Valley WWTF SWPPP Page 6 Part 1. Pollution Prevention Team 1.1 Contact Information/Responsible Parties Fad//ty Operator Metropolitan Council Environmental Services 6163 St Croix Trl N Oak Park Heights,MN 55082 (651)437-4212;FAX:651-437-5749 Fad//ty Owner Metropolitan Council Environmental Services 390 Robert St N St Paul,MN 55101-1805 (651)602-1000 SWPPP Contact Dennis Lindeke,Assistant Business Unit Manager (651)437-4212 or(651)602-1281;cell(651)755-2328 1.2 Stormwater Pollution Prevention Team Patricia Oates East Business Unit Manager (651)602 4911 (651)437-4212 (651)755-2320 cell Responsibilities: • Signatory authority. • Emergency contact. • Review and approve all stages of plan development and implementation. • Identify appropriate personnel and respective training needs to effectively implement this Plan and the proper implementation of related control measures. • Implement and/or direct the training of appropriate personnel. • Implement and/or direct inspections and monitoring to ensure effectiveness of control measures,and for compliance with this Plan. • Ensure that timely preventive maintenance and good housekeeping procedures are carried out. • Ensure submittal of reports related to the Permit. • Ensure update of this Plan,as needed. • Ensure maintenance of stormwater records,including inspection and maintenance records related to control measures and sampling. MCES—June 2014 Revision St Croix Valley WWTF SWPPP Page 7 Dennis Lindeke Assistant Business Unit Manager (651)439-4123 (651)602-4214 _ (651)755-2328 cell Responsibilities: • Primary emergency contact. • Implement training of employees. • Conduct inspections and monitoring to ensure effectiveness of control measures,and for compliance with this Plan. • Conduct timely preventive maintenance and good housekeeping procedures to ensure compliance with this Plan. • Submit reports related to the Permit to Environmental Compliance staff in a timely manner. • Identify appropriate and timely updates of the SWPPP, including the Site Map,and facilitate update by Environmental Compliance staff. • Maintain stormwater records,including inspection and maintenance records related to control measures and sampling. St Croix Valley Plant Operations Staff (651)439-4123 Responsibilities: • Contain and cleanup spills of significant materials. • Emergency contact. • Attend training as directed by management. • Practice good housekeeping and implement other control measures,as directed by management. • Conduct inspections as directed by management. • Attend tankers and other vehicles during loading/unloading of significant materials to ensure that control measures and SOPs are followed. • Initiate the spill response and MCES Spill Reporting Procedure,as necessary. The most recent version of this procedure is maintained electronically on the MCES intranet site at: http://metnet/es/eqd/ec/SitePages/SpillReporting.aspx. Maintenance(Trades)Staff Jim Schmidt Maintenance Director (651)602-8355 • Perform preventive and/or corrective maintenance on stormwater equipment as directed by management. • Notify plant management and operations staff when spills are observed. • Attend training as directed by management. Environmental Compliance Staff MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 8 Julianne Rantala Principal Environmental Scientist (651)602-1011 • Complete updates to SWPPP,including the Site Map,as identified by the SWPPP contact. • Coordinate and submit reports related to the Permit in a timely manner. • Perform,participate and/or assist with training of employees,as directed by the SWPPP contact. • Conduct periodic audit of Permit compliance. • Provide regulatory information and expertise,as needed, to SWPPP contact or others,as directed. MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 9 Part 2. Facility Description 2.1 Facility Information The MCES-St Croix Valley WWTF is a Class A facility designed to treat an average wet weather flow of 5.8 million gallons per day. The Facility consists of a mechanical bar screen,a vortex grit removal system,two primary clarifiers,three activated sludge aeration basins,four final clarifiers,alum addition for phosphorus removal;and ultraviolet disinfection. Primary and secondary sludges are blended and gravity thickened. All biosolids are currently loaded and hauled out to the Metropolitan Wastewater Treatment Plant. Three activated carbon filters control odors from the bar screen,grit removal units,primary clarifiers, gravity thickener and from the sludge truck loading point. This Facility operates 24 hours/day,7 days/week;the Facility is staffed ten (10)hours per day,Monday through Friday,and eight(8)hours per day on Saturdays,Sundays and Holidays. There are currently 5 employees assigned to this Facility. Operations personnel work 7 days per week; managerial,trades and administration personnel work Monday through Friday. Trades personnel are centrally organized in the Treatment Services Department –not in the operations unit that runs the plant--and are dispatched to a plant using a work order system,as work schedules and resources are directed. 2.2 Facility Discharges&Receiving Water The Facility has a continuous discharge(via an underwater outfall)to the St Croix River;this outfall is regulated by NPDES/SDS Permit No. MN0029998. Stormwater at this Facility is primarily sheet flow that is consolidated in swales for discharge from the plant via five stormwater outfalls. The northeast portion of the facilty drains to a tarred swale,which drains into the main Facility outfall to the St Croix River. The other four outfalls consolidate flow from the plant to riprapped areas that discharge on the southeast side of the plant to a wetland area that adjoins the St Croix River. Stormwater from small portions of the facility not draining to one of the outfalls drains from the Facility in a non-specific sheet flow manner. The drainage patterns and outfalls at this Facility are identified and enumerated on the Site Map(Figure 2 and Attachment B). • This Facility discharges to the St Croix River at river mile 22. MCES—June 2014 Revision St Croix Valley WWTF SWPPP Page 10 • The water use classifications of the receiving water are Class 1 C, 2Bd,3B,4A,4B,5,and 6(ORVW). • Benchmark monitoring locations have been identified at this Facility, and are indicated on the site map as BML01,BML05 (the representative sampling location for the previously identified and listed monitoring locations BML02 and BML03),BML04,and BML06,a newly identified roof drainage point. In accordance with the Permit,second year monitoring was completed at the Facility beginning in October, 2011;BML01 and BML04 exceeded threshold levels for TSS and will repeat fourth year monitoring. • This Facility is subject to the additional provisions in Appendix A of the permit. Table 1 lists waters within 1 mile of the Benchmark Monitoring Locations(BMLs)at the Facility and the applicable requirements identified in Appendix A to the Permit. Part 12 of this Plan provides additional detail on compliance with Appendix A. • This Facility is within 1 mile of the following Clean Water Act section 303d listed impairments(based on 2010 draft listing): o St Croix River(Apple River(WI)to Willow River (WI)XAUID 07030005-504) • Impaired for PCBs(listed in 2006). • No TMDLs for this reach have been approved; completed;proposed or in progress. o Lake St Croix(AUID 82-0001-00) • Impaired for aquatic/recreational use based on excess phosphorus(listed in 2008). • TMDL ID 10465 for this impairment listing is underway. • This Facility is included in the Lake Pepin watershed. • This Facility does not discharge to a MS4. Table 1. A, 'endix A Waters within 1 mile of BMLs Outstanding Value Resource Water St Croix River(Apple R to Willow App.A,Part F (ORVW)listed by Minn.R. R)(AUID 07030005-504) 7050.0180 Restricted discharges as defined by Minn.R. 7050.0180,subp.6,6a or 6b: • Lake Superior None. App.A,Part F.1. • Mississippi River identified None. App.A,Part F.1. reaches • Lake Trout Lakes,as identified None. App.A,Part F.1 and F.3. by Minn.R.7050.0460 to 7050.0470 • Federal-or state-designated St Croix River(Taylors Falls to App.A,Part F.1. scenic or recreational river mouth) segment • Calcareous fens as identified by None. App.A,Part F.1 and F.3. MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 11 Minn.R.7050.0180,subp.6b. Trout streams listed in Minn.R. None. App.A,Part F.1 and F.3. 6264.0050,subp.4. Wetlands listed in Minn.R. 25 wetlands listed in the National App.A,Part F.4. 7050.0186,subp. 1 a.B. Wetlands Inventory,including 1 Class 3, 1 Class 4 and 10 Class 5 wetlands. 2.3 Facility Activities Activities at this Facility can be generally grouped into three broad categories: operations,maintenance,and land disturbing activities. Significant materials or areas related to these activities are list in Part 4.1 of this Plan and on the Site Map(Figure 2 and Attachment B). Operations related activities include: • screenings and grit removal,storage and load-out; • load out/haul out of sludge; • chemical delivery,storage and use;and, • back-up power generation. Maintenance related activities include: • grounds maintenance,including application of chemicals on lawn and for weed/nuisance control; • facilities maintenance,including application of chemicals for road maintenance; • fueling and maintenance of vehicles and plant equipment; • buildings maintenance,including contracted work. Land disturbing activities include any land disturbing activity at the Facility, such as landscaping or construction activity which may result in disturbed or bare soils AND which IS NOT is not separately covered by a construction stormwater permit(MNR100001,effective 8/1/2013). • Small landscaping or construction projects that disturb LESS THAN 1 acre are covered by this Plan. o Any soil disturbing activities in this category,as well as temporary BMPs and/or BMP maintenance activities for the activity,are noted on the Inspection Checklist form for the relevant inspection period. A copy of the Site Map,which indicates the disturbed area/project area,is included with the relevant Inspection Checklist. • Land disturbing projects that disturb 1 acre or MORE are not covered by this plan,but would instead be respectively covered by the project specific SWPPP developed in compliance with the general construction stormwater permit(MNR100001,effective 8/1/2013). o Any soil disturbing activities in this category are noted on the Inspection Checklist form for the relevant inspection period along with Construction Stormwater Permit number for the specific project. A copy of the Site Map,which indicates the MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 12 , f disturbed area/project area, is included with the relevant Inspection Checklist. t MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 13 Part 3. Facility Map 3.1 General Location Map The MCES-St Croix Valley WWTF(Facility)is roughly 11.3 acres in size and is generally located at the NW 1/4 of the SE'/.of Section 34,Township 30 North,Range 20 West,Oak Park Heights,Washington County, Minnesota. The street address of the Facility is 6163 St Croix Trl N,Oak Park Heights,MN 55082. The Universal Trans Mercator(UTM) coordinates,in meters,for the effluent line at the Facility are:x=516476.73, y=4987310.91. A general location map for the Facility is shown in Figure 1. A copy of the general location map for this Facility is included as Attachment A to this Plan. 3.2 Site Map The Site Map is used in several ways during Plan implementation: • Rapid identification of chemical storage/handling areas; • Rapid identification of drainage pathways within the plant to aid in spill containment; • Identification of areas requiring routine maintenance; • Identification of stormwater outfalls which may require monitoring; and, • Identification of areas to be examined during routine and comprehensive inspections. A site map for the Facility is shown in Figure 2,and presents the following information for the Facility: • Surface water drainage areas(i.e.subwatershed areas). • Directional arrows indicating paths of surface water flow. • Location of stormwater conveyances. • Location of stormwater outfalls–points where stormwater discharges from the Facility. • receiving stormwater from the Facility. • Location of potential pollutant sources,including: o Storage locations of significant materials; o Fueling and vehicle maintenance areas;and, o Locations of biosolids loadout/transport at the Facility. • Location of receiving water in the immediate vicinity of Facility. • Location and extent of structural BMPs at the Facility–infiltration basins,swales,green roof,etc. • Identification of non-contributing areas–those areas of the plant which drain back into WWTF unit processes for treatment and do not contribute to surface stormwater drainage. • Identification of impervious areas–areas of hard surface(i.e.pavement, rooftops,etc)that contribute nearly 100%of precipitation as stormwater runoff. MCES—June 2014 Revision St Croix Valley WWTF SWPPP Page 14 A copy of the site map for this Facility is included as Attachment B to this Plan. t MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 15 Figure 1. General Location Map: MCES-St Croix Valley WWTF Ma Seven County Metropolitan Area IV I �I�'i u�RiTi. mu MCES-St Croix Valley WWiP T30N,R2OW,Section 34,Oak Park Heights,Washington County,Minnesota allillaNiftaite,10,114 ilirgillINTIR1414. ' . - ririt EL Scale:1:10,000;Map source: MCES Statr,8110,l9 i 1 ' p ` jj,�i .,''-a.3 c. \li ` F: a "9 iii . r *°.1 `4 A q ,.��,w+C _iou 46. nI a Y' S b `;�.'tt. �'ayl(I 1Jq ' N .//� l 1',. �1 1 } -i/ Qw 1,� '° x2 tit `. -1 FOTH$TM -,.!". .-" fit'` 's, � 'ty li .. .,....,-. :"V.,4,1,,sp 1 - % t „.....o-,,..1 ..,..41/4, *4 IA" r b` '"b =lie', °, i , ,a s 'tip ^ , "A`H 7' �, ,'''...,,T., *R M1 - '' ,- (b Yk ,��,� yr[ � '-4.,,' a .. n r3X t. '� ` °+: Wt ',�;"i+,,.,4.r... .err>'a'" F.. l"dlt r[r !=a` "et a-? 'lrha'e [� °''��er 4 - - Ur:.). 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""c' fETROPOLITHfi WHITE 6aa.Y.LIRMIM �W - ENGINEERING a CONSTRUCTION _ (OflTROL common M 575 PIA-sum DEPARTMENT M'W ar m.rs rror. + MCES-St Croix Valley WWTP Permit ID Number: MNR0535M5 List of Si •nificant Materials Stem 17777rr 4:---'74:71SWWISifiGA0f4, At,:.1't ittv sm-oi Raw or partially treated wastewater SM-02 Screenings SM-03 Grit SM-04 Activated carbon SM-05 Scum SM-06 Sludge SM-07 Aluminum sulfate(alum) SM-08 Diesel fuel SM-09 Generator exhaust SM-10 Grass clippings SM-11 Pesticides SM-12 Fertilizers SM-13 Herbicides SM-14 Insecticides SM-15 Fungicides SM-16 Rodenticides SM-17 Windshield washer fluid SM-18 Unleaded fuel SM-19 Oils,greases&lubricants SM-20 Oil filters/rags SM-21 Partswasher SM-22 Boiler treatment additives SM-23 Salt SM-24 Vehicle wash water from sludge trucks SM-25 Water softener salt SM-26 Small amounts of unrelated materials SM-27 Used lamps(including UV disinfection lamps) SM-100 Exposed soil SM-200 Material stockpiles SM-O Significant materials brought on-site/in use by MCES contractor or trades staff 4/2012 4. Potential Pollutant Sources 4.1 Industrial Activity and Associated Pollutants The MCES-St Croix Valley WWTF is a wastewater treatment facility designed to treat an average wet weather flow of 5.8 million gallons per day. This Facility operates 24 hours/day,7 days/week;the Facility is staffed ten(10) hours per day,Monday through Friday,and eight(8)hours per day on Saturdays,Sundays and Holidays. There are currently five(5)employees assigned to this Facility. The primary SIC for this Facility is 4952: Sewerage Systems. This Facility falls into Sector T:Treatment Works of the General Industrial Stormwater Permit MNR050000. Activities at this Facility can be generally grouped into three broad categories: operations,maintenance,and land disturbing activities. Included on Table 2 below,are the significant materials and pollutants associated with industrial activities at the Facility. Table 2. Si nificant Materials and ' •Ilutants associated with industrial activi . WWTF Operations Activities Operation and maintenance of Raw or Partially SM-01 • Bacteria/viruses WWTF and tributary collection Treated • BOD system,including any spills or Wastewater • Solids(suspended and releases. dissolved) • Nutrients(ammonia, phosphorus,etc). Preliminary treatment of raw • Screenings SM-02 • Sediment wastewater. • Floating Paper,plastic, and other nuisance materials(plastic, rubber,latex,etc) Grit SM-03 • Inert solids • Sediment Operation of odor control • Activated Carbon SM-04 • Solids equipment. Routine and non-routine removal, Scum SM-05 • BOD load-out and transport of floatables • Solids from primary and secondary • Nutrients clarifiers, including during maintenance and other clean-out activities. MCES—June 2014 Revision St Croix Valley WWTF SWPPP Page 19 �^y er ii • POMO, 11t000404- � ial° . Routine and non-routine removal, Sludge SM-06 • BOD load-out and transport of sludge • Solids from primary and secondary • Nutrients clarifiers,including during • Heavy metals maintenance and other clean-out activities. Sludge conditioning for Aluminum SM-07 • pH phosphorus removal and to Sulfate(Alum) • Acute Toxicity facilitate transfer off-site, including chemical delivery, storage and use. Back-up power generation. Diesel Fuel SM-08 • Diesel Range Organics Generator SM-09 • NOx Exhausts • SOx • CO • VOCs • Particulate Matter Disinfection of wastewater prior to Used Lamps SM-27 • Mercury discharge, including ultraviolet lamp delivery,storage and use. WWTF Maintenance Activities Grounds maintenance, including Grass Clippings SM-10 • Solids application of chemicals on lawn • Nutrients and for weed/nuisance control,and Pesticides' SM-11 See MSDS for specific small amounts of gasoline for product information. grounds equipment and propane Fertilizers SM-12 • Nutrients(N,P,K) for gas grills. Herbicides SM-13 • Glyphosphate (Roundup) • methylchlorophenoxypr opionic acid(MCPP) (weed and feed). Insecticides l'2 SM-14 • Chlorine • See MSDS for specific product information. Fungicides' SM-15 See MSDS for specific Rodenticides1 SM-16 product information. Propane SM-17 • Propane range organics Water treatment,including water Water Softener SM-25 • Chlorides softening and maintenance of hot Salt water heater. Boiler Treatment SM-22 • pH Additives' • Chlorides • Acute Toxicity • Heavy Metals Facilities maintenance, including Sand [SM-Of MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 20 noustiiidActivity, sSlgn gt _ P 1t 'ants dat d . Sjgnll cant application of chemicals for road Salt SM-23 • Chlorides maintenance. [SM-O]3 Used Lamps SM-27 • Mercury Fueling and maintenance of Diesel Fuel SM-08 • Diesel Range Organics vehicles and plant equipment. Unleaded fuel SM-18 • Gasoline Range Organics Oils,Greases& SM-19 • Oil and Grease Lubricants Oil Filters/Rags SM-20 • Gasoline Range Organics Partswasher SM-21 • Petroleum Distillates (hi-temp) Windshield SM-17 • Acute Toxicity Washer Fluid Vehicle Wash SM-24 • Nutrients Water • Heavy Metals • Solids Accumulation of solid waste for Solid Waste SM-25 • Sediment recycling and disposal. • Solids • Debris Unrelated materials and products Small Amounts SM-26 • Volatile Organics used for general maintenance and of Unrelated • Petroleum Distillates housekeeping, including paints, Materials • Heavy Metals enamels,thinners and degreasers, tar patch, cement patch, floor polish and sealer, spill response equipment and restroom supplies, such as hand soaps,lotions and deodorants. Buildings maintenance, including Paint/Paint [SM-O]2'3 • Organics contracted work. Related Waste, • Heavy Metals Lubricants,Oils, Greases, Sand, Others Land Disturbing Activities Land disturbing activities, Exposed soil SM-1004 • Sediment including landscaping or construction activity that total Material SM-2004 LESS THAN/EQUAL 1 ACRE. stockpiles Land disturbing activities, ` + d „ � s •,Eµ,, ,�Q� �t� including landscaping or �#� IOO i x: construction activity that total 1 ACRE OR MORE 'Pesticides,insecticides,fungicides and rodenticides are not routinely used,transported or stored on-site. These products may be utilized at the Facility on an as-needed basis;consult the MSDS for the specific product for specific pollutant information ns . 2Contractor(s)may utilize and transport significant material on site,but significant material is not stored at Facility. MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 21 3MCES regional maintenance,trades staff may utilize and transport small amounts of significant material on site,but significant material is not stored at Facility. °Any soil disturbing activities in either category(>1 acre or Sl acre)are noted on the Inspection Checklist form for the relevant inspection period along with Construction Stormwater Permit number for the specific project(for projects requiring a permit),or a listing of the temporary BMPs and/or BMP maintenance activities for the activity(for projects<1 acre). A copy of the Site Map,which indicates the disturbed area/project area,is included with the relevant Inspection Checklist. 5Emissions from boilers used for heat generation are not included as a potential pollutant source to stormwater when the combustion gas for the emission source is natural gas,propane or biogas,as only gases such as NOx and CO are emitted,while particulate matter and sulfates are not emitted to any appreciable level from these sources. MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 22 5. Stormwater Control Measures The Permit identifies several stormwater control measures that must be achieved through implementation of Best Management Practices(BMPs) at the Facility. • Good Housekeeping • Eliminating and Reducing Exposure • Salt Storage • Erosion Prevention and Sediment Control • Management of Runoff • Facility Inspection • Maintenance of BMPs and Equipment Preventive Maintenance • Elimination of Unauthorized Non-Stormwater Discharges • Spill Prevention and Response Requirements • Mercury Minimization Plan • Employee Training Program The following sections describe the specific activities and BMPs implemented at this Facility to control stormwater. Any additional control measures specified for facilities in Sector T have been included within the relevant section,if applicable. 5.1 Good Housekeeping Good housekeeping at MCES is integral to efficient operation of the Facility. As a matter of practice,MCES keeps all Facilities orderly,well maintained and free of debris to the extent practicable,particularly in areas that may expose stormwater to pollutants,such as in areas of solid waste management,storage areas,fueling areas and maintenance areas. The Facility has implemented and maintains good housekeeping procedures to ensure that exposure to significant materials and activities is minimized. This includes: • Daily inspection of Facility during operator rounds. • Sweeping,vacuuming or other clean-up at regular intervals. • Regularly scheduled removal of grit and screenings from respective indoor storage areas. • Regularly scheduled trash,debris and recyclables removal. • Interior storage of unused items,whenever feasible. • Proper storage of chemicals,including storing containers,drums, totes and bags away from traffic routes,stacking containers according to manufacturers' instructions,and storage of chemicals on spill pads or pallets(to prevent corrosion). • Accessibility of spill kits,established procedure and employee training to enable the prompt cleanup of spilled materials using appropriate methods. MCES—June 2014 Revision St Croix Valley WWTF SWPPP Page 23 5.2 Eliminating and Reducing Exposure MCES utilizes several strategies in operations that reduce,and in some cases eliminate the exposure of stormwater to significant materials. These strategies are described in the following sections. System Monitoring and Maintenance An extensive system of metering,monitors and alarm equipment are in place at the regional plants and throughout the collection system to ensure uninterrupted system operation. This facilitates the minimization of spills and exposure potential from daily operations. In addition to the system-wide monitoring,plant operators perform daily inspections of their respective plant during rounds,with special attention paid to the chemical unloading areas,sludge truck loading area,fueling area,perimeter dike and waste oil storage area. This practice allows the rapid identification and corrective action of items needing attention. Indoor storage All significant materials at this Facility are maintained indoors or under cover to prevent exposure to stormwater,with the exception of the following situations when exposure could occur: • During release of wastewater at the plant or at one of the plant treatment units(could potentially include vehicle tracking). • During the loading,unloading and/or hauling of chemicals and other significant materials(grit, screenings,biosolids,etc). • Exterior maintenance activities(lawn mowing,snow removal, etc)or temporary outdoor staging of maintenance materials and/or debris. Minimization of exposure during these situations is addressed through the implementation of Best Management Practices(BMPs)at the Facility. Refer to Table 3 for a listing of BMPs associated with each significant material. Best Management Practices and Standard Operating Procedures For activities involving a significant material or area,Best Management Practices(BMPs)have been implemented at the Facility to minimize spills and the potential for exposure. In some cases,these BMPs are formalized in a written Standard Operating Procedure(SOP),which is a formalized process which describes—for a specific process or action— what the performance expectations are,how to accomplish the task or process(sequence of actions and results),and what the results of the process or action will be. Standard Operating Procedures(SOPS)have been developed and implemented for many processes or actions involving significant materials,resulting in: • Establishment of performance expectations; • Consistency in operations; MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 24 • Minimization of waste and prevention of spills; and, • Formalization of good housekeeping and maintenance program. The act of formally evaluating and documenting work process and flow procedures leads to improved housekeeping and maintenance practices, as well as a consistently reliable outcome from a process or activity. This results in minimized exposure of materials and an enhancement in the delivery of consistent process results. For universal and oily wastes,MCES consolidates wastes at two central locations to facilitate the proper management and disposal of the wastes. A written Work Instruction is in place to describe the MCES procedures to be used for the accumulation and consolidation process,including a description of who is responsible for ensuring compliance during various stages of management,how labeling,storage and consolidation of these wastes is to be managed at each stage,and the internal tracking forms that must be completed. The most recent version of this procedure is maintained electronically on the Metropolitan Council intranet site at: http://metnet/es/eqd/ec/Shared%20Documents/503.01.03.aspx. Table 3 describes the BMPs that have been implemented at this Facility to minimize the potential for spills and stormwater exposure to significant materials. In addition to the non-structural BMPs indicated on Table 3,structural BMPs for this Facility are depicted on the Site Map (Figure 2,Attachment B). Spills Response Procedure A Spill Response Procedure is in place to minimize the potential for spills and to respond in the event of a spill: • Identification of spill containment/response equipment locations; • Formalized MCES Spill Response Procedure;and • Plant-specific emergency procedures. Refer to Part 9 of this Plan for details on the MCES Spill Prevention and Response Procedure. Employee Training Employee Training is conducted to inform and educate operators on stormwater issues,as well as on other issues impacting significant materials. This training includes: • New operator core training; • Operator refresher training;and, • Plant specific training. Refer to Part 11 of this Plan for details on the MCES Employee Training Program. MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 25 Table 3. Industrial activities associated Si.nificant Materials and BMPs. ; '77 WWTF Operations Activities Operation and Raw or Partially SM-01 • Daily inspection of Facility and maintenance of WWTF Treated target areas during Facility and tributary collection Wastewater rounds. system,including any • Proper operation and spills or releases. maintenance of WWTF. • Training of operators. • Centralized monitoring of collection system and regional plants • Centralized,coordinated response in the event of a spill. Preliminary treatment of Screenings SM-02 • Storage and load-out conducted raw wastewater. Grit SM-03 indoors or under cover. • Clean-up equipment available for mechanical pickup of spills. • Scheduled,routine pickup by collection contractor. Operation of odor control Activated Carbon SM-04 • Stored indoors or under cover. equipment. • Inventory is controlled so as to minimize amount of products stored on-site. • Limited use and access to materials,as directed by the SWPPP contact. • Plainly labeled containers. • Spill containment equipment available. • Employee training. Routine and non-routine Scum SM-05 • Routine load-outs are scheduled removal,load-out and and performed using MCES vac- transport of floatables truck/equipment. from primary and • When hose is uncoupled from secondary clarifiers, the truck,material remaining in including during the hose is contained in a 5- maintenance and other gallon bucket. clean-out activities. • When hose is removed from the scum pit,the hose is thoroughly drained over the adjacent clarifier to drain back into the treatment process. • Spill containment equipment available to block storm drains or other downgradient areas. • Employee training. MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 26 Industrial l ►x , r , Ar.lr anagemr tl t x , Routine and non-routine Sludge SM-06 • Routine load-outs are scheduled. removal, load-out and • Routine load-outs are from a transport of biosolids from single location under cover,and primary and secondary where all connections are hard- clarifiers, including during plumbed. maintenance and other • Cam lock fittings between trucks clean-out activities. and loading point. • Spill containment equipment available to block storm drains or other downgradient areas. • Employee training. Sludge conditioning for Aluminum SM-07 • Overfill protection and phosphorus removal and to Sulfate(Alum) secondary containment on tanks; facilitate transfer off-site, overfill alarms tested annually. including chemical • SOP for delivery/unloading of delivery, storage and use. chemicals;attendant present during process. • Controlled access to tanks and fill ports. • Inventory is controlled so as to minimize amount of product stored on-site. • Spill containment equipment available. • Employee training. Disinfection of wastewater Used Lamps SM-27 • Stored indoors in operational prior to discharge, housing unit(UV trays or banks including ultraviolet lamp of lamps)when not in service delivery, storage and use. and when transported and lowered/maneuvered into the disinfection channel,to minimize breakage of lamps while in service. • Screening device installed upstream of the lamps to screen any debris that may impinge on the lamps and cause breakage. • Used lamps are subject to Work Instruction for universal and oily wastes. • Employee training. Back-up power generation. Diesel Fuel SM-08 • Overfill protection and secondary containment on tanks; overfill alarms tested annually. • SOP for delivery/unloading of fuel. • Controlled access to tanks and MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 27 Inds � its/ a �:"10, fill ports. • Spill containment equipment available. • Employee training. Generator SM-09 • Minimize emissions by: Exhaust o usage is limited to emergency,peak shaving usage(per contract with Excel Energy)and exercise periods. o maintenance and operation is performed in accordance with manufacturer recommendations. WWTF Maintenance Activities Grounds maintenance, Grass Clippings SM-10 • Regular mowing intervals. including application of • Collection and/or sweeping of chemicals on lawn and for clippings from impermeable weed/nuisance control, surfaces,as directed by the and small amounts of SWPPP contact. gasoline for grounds • Employee training. equipment and kerosene Pesticides' SM-11 • Stored indoors or under cover. for space heaters. Fertilizers SM-12 • Inventory is controlled so as to Herbicides SM-13 minimize amount of products Insecticides1°2 SM-14 stored on-site;small amounts Fungicides' SM-15 purchased. Rodenticides' SM-16 • Limited use and access to Propane SM-17 materials,as directed by the Unleaded Fuel SM-18 SWPPP contact. • Plainly labeled containers. • Spill containment equipment available. • Employee training. Water treatment,including Water Softener SM-25 • Stored indoors or under cover. water softening and Salt • Inventory is controlled so as to maintenance of hot water Boiler Treatment SM-22 minimize amount of products heater. Additives stored on-site; small amounts purchased. • Limited use and access to materials,as directed by the SWPPP contact. • Plainly labeled containers. • Spill containment equipment available. • Employee training. Facilities maintenance, Sand [SM-O]3 • Stockpiles not maintained on- including application of Salt SM-23 MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 28 III aol al activity -fiPe map ag fi b` r, chemicals for road [SM-0] site. maintenance. Used Lamps SM-27 • Inventory is controlled so as to minimize amount of products stored on-site; small amounts purchased. • Limited use and access to materials,as directed by the SWPPP contact. • Plainly labeled containers. • Spill containment equipment available. • Employee training. • Roads/sidewalks are swept periodically as identified by SWPPP contact. • Spilled solids(grit, screenings, biosolids,garbage,etc)cleaned up mechanically. • Used lamps are subject to Work Instruction for universal and oily wastes. • Employee training. • Plainly labeled containers for products and wastes as to content and status(waste/product). Fueling and maintenance Diesel Fuel SM-08 • Attendant present during fill. of vehicles and plant • Fueling station is on blacktop equipment. area for rapid recovery of spills. • Inventory is controlled so as to minimize amount of product stored on-site. • Vehicles on maintenance schedule and maintained routinely to prevent excess drippage. • Limited use and access. • Spill containment equipment available. • Employee training. Unleaded Fuel SM-18 • Overfill protection and secondary containment on tanks; overfill alarms tested annually. • SOP for delivery/unloading of fuel;attendant present during process. • Controlled access to tanks and MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 29 / K rtJ fill ports. • Attendant present during fill. • Fueling station is on blacktop area. • Inventory is controlled so as to minimize amount of product stored on-site. • Limited use and access. • Spill containment equipment available. • Employee training. Oils,Greases& SM-19 • Products and wastes stored Lubricants indoors or under cover; Oil Filters/Rags SM-20 maintenance performed indoors Partswasher SM-21 or under cover. • Inventory is controlled so as to minimize amount of products and wastes stored on-site;small amounts purchased. • Plainly labeled containers for products and wastes as to content and status(waste/product). • Segregation of products and wastes. • Used oil storage is central and relatively large(250 gal tank)to minimize handling and to control access. • Recycling or disposal arranged periodically to minimize amount on hand. Windshield SM-17 • Maintenance performed indoors Washer Fluid or under cover. • Inventory is controlled so as to minimize amount of products and wastes stored on-site. • Plainly labeled containers for products and wastes as to content and status(waste/product). • Limited use and access. • Spill containment equipment available. • Employee training. Vehicle Wash SM-24 • Trucks used for hauling sludge Water are washed in designated areas that drain to treatment unit. MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 30 Activity 4,^$ ° "lt2 Map Management ,, ificant . o Accumulation of solid Solid Waste SM-25 • Segregation of products and waste for recycling and wastes. disposal. • Plainly labeled containers for products and wastes as to content and status(waste/product). • Recycling or disposal arranged periodically to minimize amount on hand. • Employee training. Unrelated materials and Small Amounts SM-26 • Products and wastes stored products used for general of Unrelated indoors or under cover; maintenance and Materials maintenance performed indoors housekeeping,including or under cover. paints,enamels,thinners • Inventory is controlled so as to and degreasers,tar patch, minimize amount of products cement patch,floor polish and wastes stored on-site;small and sealer, spill response amounts purchased. equipment and restroom • Plainly labeled containers for supplies, such as hand products and wastes as to content soaps, lotions and and status(waste/product). deodorants. • Segregation of products and wastes. • Inventory is controlled so as to minimize amount of product stored on-site. • Limited use and access. • Spill containment equipment available. • Employee training. Buildings maintenance, Paint/paint [SM-O]3'4 • Plainly labeled containers including contracted work. Related Waste, • Significant material may be Lubricants,Oils, transported on-site for use,but Greases, Sand, are generally not stored at Others Facility. • For those materials that are maintained on site, inventory is controlled so as to minimize amount stored on-site;small amounts purchased. • For those materials that are maintained on site, limited use and access to materials. • Plainly labeled containers. • Spill containment equipment available. • Employee training. MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 31 or ,.. � ��" . .>w a, ,- c w ,< Land Disturbing Activities Land disturbing activities, Exposed Soil SM-1005 • If a project is subject to inclusion including landscaping or in the plan,the project and BMPs construction activity that Material SM-2005 specific to the project will be total LESS THAN OR Stockpiles indicated on the Inspection Form EQUAL 1 ACRE. for the relevant time period. • Construction and/or maintenance contracts reference MCES specifications for erosion control (01563 Erosion and Sedimentation Control). The specifications describe MCES expectations for performance and appropriate erosion control and restoration measures. These specifications generally parallel the construction stormwater requirements. • Identification of a construction staging area allows for a partitioning of stockpiles at the site,which are amenable to comprehensive erosion control strategies. • Inspection of construction areas is included in the daily operator rounds,allowing the rapid identification and corrective action of items needing attention. • Coordination of operations staff with on-site construction staff offers quick resolution of identified issues. 1Pesticides,insecticides,fungicides and rodenticides are not routinely used,transported or stored on-site. These products may be utilized at the Facility on an as-needed basis;consult the MSDS for the specific product for specific pollutant information. 2Contractor(s)may utilize and transport significant material on site,but significant material's_imt stored at Facility. 3MCES regional maintenance,trades staff may utilize and transport small amounts of significant material on site,but significant material is not stored at Facility. `Any soil disturbing activities in either category(>1 acre or<l acre)are noted on the Inspection Checklist form for the relevant inspection period along with Construction Stormwater Permit number for the specific project(for projects requiring a permit), or a listing of the temporary BMPs and/or BMP maintenance activities for the activity(for projects<l acre). A copy of the Site Map,which indicates the disturbed area/project area,is included with the relevant Inspection Checklist. 5There are no Significant Materials present at this Facility above the threshold,and that are subject to the Spill Prevention, Control and Countermeasures(SPCC)regulations or the Minnesota Spill Bill. 5.3 Salt Storage Snow removal,and salting and sanding of roads at the Facility is completed by an outside contractor. The contractor transports salt and/or sand on-site for these purposes as needed;there are no stockpiles of sand or salt on-site. MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 32 Small amounts of salt are stored on-site at Site Map location SM-23 for the purpose of deicing entrances to Facility buildings. This salt is stored in containers and under cover when not in use. 5.4 Erosion Prevention and Sediment Control Erosion prevention and sediment control at the Facility is accomplished by use and maintenance of BMPs;structural and non-structural BMPs for this Facility are indicated on Table 3 and depicted on the Site Map (Figure 2,Attachment B). Vegetative cover is utilized to reduce the flow velocity of stormwater into the collection system and filter sediment from stormwater,where possible,particularly in areas surrounding stormwater inlets,or in areas receiving sheet flow from a portion of the Facility. In areas at the Facility that are prone to poor vegetation and therefore subject to more erosion--such as around treatment units,conveyances for sheet flow from the Facility,and areas prone to vehicle and/or pedestrian traffic,accommodations to prevent erosion and encourage infiltration are made. These accommodations may include–depending on the specifics of the problem,weed control,use of native vegetation, addition of rip-rap,rerouting of flow into a more sustainable area,and where necessary,the addition of parking lots and/or sidewalks to consolidate and collect flow. Parking is limited to designated roads and general parking areas to prevent disruption of cover materials. For sediment control on impervious surfaces,the Facility performs routine sweeping of street and other impermeable surfaces at a frequency identified by the Facility SWPPP contact. 5.5 Management of Runoff The following strategies are primarily used at this Facility to manage runoff so as to minimize pollutants in stormwater discharges from this Facility: • Maintenance of ground cover,where possible,and rip-rap at other areas,to reduce velocity of stormwater,removal of solids, and to encourage infiltration on-site. • Proper design and maintenance of the Facility to facilitate drainage and infiltration. • Installation of biologs upstream of stormwater discharge locations to trap sediment and slow velocity of water into rip- rapped areas. Cover and rip-rapped areas,as well as stormwater conveyances at the Facility are indicated on the Site Map(Figure 2,Attachment B). MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 33 5.6 Facility Inspection The Permit requires monthly inspection of areas at the Facility where industrial materials are exposed to stormwater,with at least one inspection occurring during a runoff event. Beginning with Permit coverage,stormwater inspections are conducted monthly at all MCES facilities,with at least one inspection per year done during a runoff event. In addition,plant operators perform daily inspections of their respective plant during rounds,with special attention to the chemical unloading areas,sludge truck loading area,fueling area and waste oil storage area. This practice allows the rapid identification and corrective action of items needing attention. Details on monthly inspection at this Facility can be found in Part 6 of this Plan;documentation of inspections and findings can be found in Attachment D to this Plan. 5.7 Maintenance of BMPs and Equipment Preventive Maintenance The Permit requires MCES to ensure BMPs used for treating stormwater are functional and in working order. Details on BMP Maintenance at this Facility can be found in Part 7 of this Plan;documentation of maintenance to BMPs is maintained with Inspection Forms in Attachment D to this Plan. Documentation of preventive maintenance of equipment is maintained in the MCES work order system;specific records and information is available upon request. 5.8 Elimination of Unauthorized Non-Stormwater Discharges The Permit requires MCES to determine and document that all discharges from the Facility have permit coverage. Other than the five stormwater outfalls(BML01 through BML05),there is one other discharge from this Facility,which has NPDES/SDS permit authorization. There are no other discharges from this Facility. Refer to Part 8 of this Plan for details on this determination. 5.9 Spill Prevention and Response The Permit requires the development and implementation of a Spill Prevention and Response Procedure. The Spill Prevention and Response Procedure for this Facility is described in detail in Part 9 of this Plan. 5.10 Mercury Minimization Plan The Permit requires a determination of any sources of mercury at the Facility that are exposed to stormwater. MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 34 At this Facility,there are three possible sources of mercury that could expose stormwater to mercury in the event of a spill or other contact with stormwater: • UV disinfection lamps(SM-27); • Used lamps(SM-27);and, • Untreated or partially treated sewage(SM-01). Part 10 of this Plan describes the procedures and BMPs are in place at the Facility for each mercury containing item to minimize exposure to precipitation and stormwater runoff. 5.11 Employee Training Program The Permit requires the development and implementation of an Employee Training Program to inform and educate operators and other staff on stormwater and other issues impacting significant materials, including BMP operation and maintenance,monitoring,good housekeeping and material storage and management. The Employee Training Program for this Facility is described in detail in Part 11 of this Plan. MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 35 6. Inspections The purpose of Facility inspection is to: • Determine that the Plan accurately reflects site conditions; • Verify that BMPs are in place and functional; • Determine if any new significant materials or activities have been added since last inspection was completed; • During runoff event,conduct visual examination to observe for discoloration or other contaminants in runoff. 6.1 Persons Responsible Generally speaking,the SWPPP contact identified in Part 1.2 of this Plan is responsible for completing and documenting stormwater inspections. In some cases,the SWPPP contact will direct another individual to complete the inspection. If designated,the alternate inspector will be properly trained to evaluate the Facility in the context of this Plan. 6.2 Schedule for Conducting Inspections The Permit requires monthly inspection of areas at the Facility where industrial materials are exposed to stormwater,with at least one inspection occurring during a runoff event. Beginning with Permit coverage, stormwater inspections are conducted monthly at all MCES facilities,with at least one inspection per year done during a runoff event. In addition,plant operators perform daily inspections of their respective plant during rounds,with special attention paid to the chemical unloading areas,sludge truck loading area,fueling area,and waste oil storage area. This practice allows the rapid identification and corrective action of items needing attention. 6.3 Specific Areas to be Inspected Significant materials,controls in place(BMPs)and outfalls are specifically listed and enumerated on the Site Map(Figure 2,Attachment B),and is used as the basis for specific areas to be inspected during a stormwater inspection. Findings of the inspection,and any corrective actions identified and completed,are documented and maintained in Attachment D of this Plan. As with the daily operator rounds,special attention is paid to the chemical unloading areas,sludge truck loading area,fueling area, perimeter dike and the waste oil storage area. Daily rounds enhance stormwater management,allowing for the rapid identification and corrective action of items needing attention. MCES—June 2014 Revision St Croix Valley WWTF SWPPP Page 36 The form included as Attachment D to this Plan is used to record and document inspection findings;documentation of inspections and findings are also included in Attachment D to this Plan. t MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 37 7. BMP Maintenance 7.1 Maintenance of BMPs Best Management Practices at this Facility are both structural and non- structural,as indicated on Table 3. Maintenance activities for structural BMPs at this Facility,as identified on the Site Map(Figure 2, Attachment B),are handled differently,depending on the specific BMP and the severity of the problem. At this plant,biologs have been installed upgradient of the riprapped areas to provide additional sediment control in stormwater leaving the Facility. The capacity and stability of the biologs are checked with each inspection. Plant staff provides regular cutting of grass during the growing season to ensure maintenance of vegetative cover. Potential causes of erosion(animal tunneling,poor grass cover,etc)are corrected when identified. Periodic street sweeping is arranged by the SWPPP contact as needed. Documentation of maintenance to BMPs is maintained with Inspection Forms in Attachment D to this Plan. 7.2 Equipment Preventive Maintenance In accordance with the NPDES/SDS permit for discharge of WWTF effluent via outfall SD001,the plant properly operates and maintains the Facility to achieve compliance with effluent limitations. Proper operation and maintenance includes effective performance,adequate funding,adequate operator staffing and training,and adequate laboratory and process controls. Vehicles and other plant equipment are regularly scheduled for preventive maintenance using a work order system;leaks are repaired as soon as they are identified. As noted in other sections,plant and vehicle maintenance is completed indoors whenever possible. Also as noted in other sections,vehicle washing is conducted only in designated areas which drain back to the treatment plant. Daily inspections of key areas facilitate rapid identification and resolution of instances when this is not occurring. Proper operation and maintenance of the on-site generator reduces actual emissions,reducing exposure to significant materials. Documentation of preventive maintenance of equipment is maintained in the MCES work order system;specific records and information is available upon request. MCES—June 2014 Revision St Croix Valley WWTF SWPPP Page 38 8. Non-Stormwater Discharge Certification There are two types of authorized discharges from this Facility,both of which have authorization. There are no other discharges from this Facility. • Effluent from the treatment process is authorized via NPDES/SDS permit no.MN0029998. • Stormwater discharged in accordance with the NPDES/SDS Permit no.MNR050000(General Industrial Stormwater Permit). 8.1 Date of Evaluation Verification that no unauthorized discharges from the Facility are occurring was most recently completed in September,2009. This Facility was originally constructed for primary treatment in 1959,with secondary treatment added in 1970. A renovation and expansion to its current capacity was completed in 1993;the plant is equipped with odor control facilities. The plant was constructed and modified with no non- stormwater sources. 8.2 Description of Evaluation Criteria Used Original and modification design specifications were used to determine that there were no designed conveyances or other means of discharge for non-stormwater discharges from the Facility. The conclusion that there are no unauthorized non-stormwater discharges from the Facility is verified monthly during stormwater inspections and observation of drainage from the Facility. 8.3 List of Outfalls/On-Site Drainage Used for Verification All plant operations as well as general drainage flow and discharge patterns from the Facility were observed to verify the design findings. Specifically,outfall SD001:Main Facility Discharge and the stormwater outfalls indicated on the Site Map(Figure 2 and Appendix B)are the only discharges. 8.4 Different types of non-stormwater discharge(s) There is one non-stormwater discharge from the Facility at outfall SD001:Main Facility Discharge. This discharge is authorized by NPDES/SDS Permit No.MN0029998. There are no sources or discharges of cooling water,dewatering or other non-stormwater discharges from the Facility. Sludge hauling vehicles are kept clean by washing in designated areas,with the wash water draining to the WWTF for treatment prior to discharge via outfall SD001. 8.5 Actions Taken to Eliminate Unauthorized Discharges Action(s)taken,such as a list of control measures used to eliminate unauthorized discharge(s), if any were identified:not applicable. MCES—June 2014 Revision St Croix Valley WWTF SWPPP Page 39 9. Spill Prevention and Response Procedure MCES prepares for potential releases in order to minimize impact on stormwater in three ways: • Identification of spill containment/response equipment locations; • Formalized MCES Spill Response Procedure;and • Plant-specific emergency procedures. 9.1 Spill Containment/Response Equipment Location To minimize the release of a significant material in the event of a spill, spill containment/response equipment is located at strategic areas throughout the Facility. In cases where an SOP has been developed for a procedure involving a significant material,there are several strategies for minimizing the impact of a spill of a significant material: 1. Listing appropriate spill containment/response equipment in the list of materials needed for the procedure. 2. Verification of location of spill containment/response equipment prior to initiating a fill or load-out procedure. 3. Ensure that spill containment/response equipment is in place prior to initiating a fill or load-out procedure. 9.2 MCES Spill Response Procedure In the event of a spill,regardless of whether there is a release to the environment,the division-wide MCES Spills Response Procedure is implemented. The most recent version of this procedure is maintained electronically on the MCES intranet site at: http://metnet/es/eqd/ec/SitePages/SpillReporting.aspx. This procedure documents the mechanism that should be used in the event of a spill to ensure a consistent and timely identification and response to spills at a plant or on the collection system,as well as to ensure that notifications and other regulatory actions are completed in compliance with respective rule and/or permit requirements. The foundation of the Spills Response Procedure is the operation of the Regional Dispatch Center,a monitoring center that is staffed 24 hours/day,365 days/year. The Regional Dispatch Center receives all spill calls,coordinates and facilitates the appropriate spill response and immediate corrective action,and completes all the necessary notifications and contacts with both internal and external parties. Although spills made by contractors while on Council property are the responsibility of the respective contractor,MCES staff are instructed to offer assistance in stopping or containing the spill. MCES—June 2014 Revision St Croix Valley WWTF SWPPP Page 40 li 9.3 Plant-Specific Emergency Response Procedure In addition to the generalized procedure for spill response,Emergency Plant Procedures are developed and implemented on a plant level. Detailed procedures for spill clean-up are included in the St Croix Valley Plant Emergency Procedures Manual. Emergency Plant Procedures are reviewed and updated,if needed,on an annual basis. Plant specific training is conducted based on refreshed procedures. 9.4 SPCC Planning Any Facility subject to regulation must prepare and implement a Spill Prevention Control and Countermeasures Control(SPCC)to help prevent any discharge of oil into navigable waters or adjoining shorelines. SPCC regulation is preventive in nature,as opposed to after-the-fact reactive measures commonly described in Oil Spill Contingency Plans. This Facility is not required to develop and implement a Spill Prevention Control and Countermeasures Control(SPCC)plan. MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 41 10. Mercury Minimization Plan The Permit requires a determination of any sources of mercury at the Facility that are exposed to stormwater. At this Facility,there are three possible sources of mercury that could expose stormwater to mercury in the event of a spill or other contact with stormwater: • UV disinfection lamps(SM-27); • Fluorescent lamps(SM-27);and, • Untreated or partially treated sewage(SM-01). The following sections describe the procedures and BMPs are in place at the Facility for each mercury containing item to minimize exposure to precipitation and stormwater runoff. 10.1 Ultraviolet Disinfection Lamps Three MCES facilities are currently equipped with ultraviolet disinfection systems,which contain mercury vapor lamps:Eagles Point, Empire and St Croix Valley WWTFs. To prevent exposure to stormwater,lamps are protected from breakage at various points:during storage while not in service,during service,and when lamps are spent or waste. First,lamps are stored indoors in their operational housing unit (UV trays or banks of lamps)when not in service and during transport. Storing and transporting the lamps in the housing unit protects them from breakage during storage or when lowered/maneuvered into the disinfection channel. While there is some possibility of breakage of lamps during this process and/or when adding/removing individual lamps to/from the larger bank unit,the potential volume of released material is minimized by stabilizing the lamps in a single unit. The stability of the housing unit offers protection to minimize breakage of lamps while in service. In addition,mechanisms have been installed upstream of the lamps to screen any debris that may impinge on the lamps and cause breakage. Finally,spent lamps are properly managed to prevent breakage,and in accordance with applicable rules. For all MCES facilities,all spent or waste lamps are shipped to a centralized location for consolidation,storage and shipment for recycling. Applicable rules and procedure for managing lamps is conveyed to employees using the MCES Work Instruction entitled"Universal and Oily Wastes–Proper Handling and Management". The most recent version of this work instruction is maintained electronically on the Council intranet site at: http://metnet/es/eqd/ec/Shared%20Documents/503.01.03.aspx. MCES—June 2014 Revision St Croix Valley WWTF SWPPP Page 42 10.2 Fluorescent Lamps Spent lamps are properly managed to prevent breakage,and in accordance with applicable rules. For all MCES facilities, lamps are shipped to a centralized location for consolidation,storage and shipment for recycling. Applicable rules and procedure for managing lamps is conveyed to employees using the MCES Work Instruction entitled "Universal and Oily Wastes–Proper Handling and Management",which is described in the following section. The most recent version of this work instruction is maintained electronically on the Council intranet site at:http://metnet/es/eqd/ec/Shared%20Documents/503.01.03.aspx. 10.3 Untreated or Partially Treated Sewage Mercury is present in wastewater entering wastewater treatment facilities. Based on two extensive studies completed by MCES in collaboration with the Minnesota Dental Association(MDA)related to discharges of mercury-containing dental amalgam waste to the Metropolitan Disposal System(MDS),it is known that up to 44%of mercury reaching Council wastewater treatment plants were directly the result of discharges from dentists. One of the principal strategies for managing potential mercury pollution of stormwater therefore,is pollution prevention. Beginning in 2003,MCES and the MDA established the Dental Clinic Amalgam Recovery Program. By the end of 2009,virtually all of the metro area general practice clinics have installed a separator to recover mercury from wastewater before it is discharged,which has resulted in a 46%reduction of mercury in the influent at its largest plant,the Metropolitan Wastewater Treatment Plant. Other plants show similar reductions in mercury influent. In addition to pollution prevention activities,MCES relies on the spill prevention and response measures described above to minimize exposure of mercury containing materials to stormwater. MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 43 11. Employee Training Program Employee Training is conducted to inform and educate operators and other staff on stormwater and other issues impacting significant materials,including BMP operation and maintenance,monitoring,good housekeeping and material storage and management. MCES training includes: o New operator core training; o Operator refresher training;and, o Plant specific training. Core training is a 54-module training program that is part of an extensive 6 month training period for new operators;operators must certify within 90 days after assignment to a plant. Several modules in the core training focus on environmental compliance in general,as well as on stormwater and spill response specifically. There are other modules that reinforce stormwater concepts in terms of proper maintenance,good housekeeping and inventory management philosophies. Spill response is also included in the Hazard Communication module. The modules are repeated on a three year cycle for existing operators,so that periodic refreshers and updates of information are presented beyond the initial training period. Employees that transport biosolids off-site are trained in the use of hauling vehicles and hold a commercial driving certificate(CDL). In addition to this department-level core training,each plant conducts annual training based on the Emergency Plant Procedure that is prepared specifically for their respective location;this procedure is updated annually. This opportunity is used to specifically identify what BMPs (and SOPs and Work Instructions,as relevant)are implemented at the specific plant,and how to response to emergencies,such as spills,at that location. Beginning in 2013,a stormwater module was added to the training program for all operators. As specified by the additional technology- based effluent controls for Sector T,training includes petroleum product management;process chemical management;spill prevention and controls; fueling procedures;general good housekeeping practices;and proper procedures for using fertilizer,herbicides and pesticides. Dates of training and training rosters are maintained separately and are available upon request. MCES—June 2014 Revision St Croix Valley WWTF SWPPP Page 44 12. Impaired Waters/TMDLs The main Facility outfall is a continuous discharge(via an underwater outfall)to the St Croix River at river mile 22. Stormwater at this Facility is primarily sheet flow that is consolidated in swales for discharge from the plant via five stormwater outfalls. The northeast portion of the facilty drains to a tarred swale,which drains into the main Facility outfall to the St Croix River. The other four outfalls consolidate flow from the plant to riprapped areas that discharge on the southeast side of the plant to a wetland area that adjoins the St Croix River. Stormwater from small portions of the facility not draining to one of the outfalls drains from the Facility in a non-specific sheet flow manner. 12.1 Impaired Waters Listing and Status Waters which are impaired for a particular listed usage must be addressed by the MPCA with a Total Maximum Daily Load(TMDL) study,plan and implementation. Discharges to an impaired water must not cause or contribute to the impairment. If stormwater is specifically listed in the TMDL implementation plan,the Plan must accommodate loading allocations and/or other provisions to reduce causality. As required by the Permit,this Plan identifies any impaired water within 1 mile of the Facility. Based on the 2010 draft impairment listing,the following waters are listed as a Clean Water Act section 303d listed impairments: • St Croix River(Apple River(WI)to Willow River (WI)XAUID 07030005-504) o Impaired for PCBs(listed in 2006). o No TMDLs for this reach have been approved; completed;proposed or in progress. o It is not anticipated that stormwater from this Facility will cause or contribute to either the PCB impairment; benchmark testing results below the threshold value will provide concurrence. • Lake St Croix(AUID 82-0001-00) o Impaired for aquatic/recreational use based on excess phosphorus(listed in 2008). o A TMDL for this impairment is underway. The TMDL will be jointly developed by the Wisconsin Department of Natural Resources(WDNR)and the Minnesota Pollution Control Agency(MPCA)with support from the St.Croix River Water Resources Planning Team;an interagency planning team consisting of federal,state and local members formed to work together to protect MCES—June 2014 Revision St Croix Valley WWTF SWPPP Page 45 and enhance the water resources in the St.Croix River Basin. 12.2 Appendix A Waters As indicated by Table 1 of this Plan,this Facility is subject to the additional provisions in Appendix A as described by the following sections. Outstanding Value Resource Water(ORVW) There is one water within 1 mile of this Facility that is listed as an ORVW by Minn.R.7050.0180:St Croix River from the Apple River in Wisconsin to Willow River(AUID 07030005-504). This facility is therefore subject to the provisions of Appendix A,Part F. In accordance with Part F of the Permit,BMPs provided by this Plan ensure a reduction of pollutant concentration in stormwater,both by having procedures and plans in place for optimal operation of the Facility to avoid contamination of stormwater,as well as by routine inspection of the Facility;these BMPs are listed in Table 3 of this Plan. Some BMPs additionally provide for reduction of flow velocity and volume,by providing infiltration opportunities. Stormwater control measures are described in Part 5 of this Plan;many of these control measures are effective long-term control strategies. Data collected from this Facility is described in Part 14 of this Plan;the lower benchmark threshold value for TSS applies(65 mg/L)to this Facility. Federal-or state-designated scenic or recreational river segment There is one segment within 1 mile of this Facility that is listed as a designated scenic river segment: St Croix River from Taylors Falls to its mouth. This facility is therefore subject to the provisions of Appendix A, Part F.1. The preceding section provides a description of how this Plan complies with the requirements of Appendix A,Part F.1 of the Permit. Wetlands There are 25 wetlands listed in the National Wetlands Inventory(NWI) within 1 mile of this Facility,including 1 Class 3, 1 Class 4 and 10 Class 5 wetlands. Wetlands in the NWI meet the definition of a wetland as described by Minn.R. 7050.0186,subp. la.B. In accordance with Part F.4 of the permit,BMPs provided by this Plan comply with wetland standards and mitigation rules,as described by Minn.R. 7050.0186. MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 46 ' A 13. SWPPP Modifications The Permit requires annual review of the Plan. Modifications must be made to the Plan to ensure that it accurately reflects activities affecting stormwater,including when any of the following are true: • there is construction or a change in design,operation or maintenance at the Facility that affects stormwater management or compliance with the Permit • a benchmark monitoring location has been added or changed at the Facility; • deficiencies in the Plan are identified during a routine inspection, compliance evaluation or visual inspection; • additional stormwater control measures and/or BMPs are necessary to meet water quality standards or applicable benchmark monitoring thresholds;or, • there is an unauthorized discharge,including a release,from the Facility. The following table describes the date and nature of each revision made to this Plan. Table 4. Loy of SWPPP Revisions . ..., .,.,. „. -,asa,.._n to_ 8/11/2009 J.Rantala,x-1011 All Original SWPPP 9/1/2010 J.Rantala,x-1011 Throughout Revisions to comply with April 2010 permit reissuance. 4/16/2012 J.Rantala,x-1011 Parts 2.2, 12,and 14, Revisions to describe and Site Map consolidation of sampling locations at BML05(BML02 and BML03)and additional sampling location(BML06), addition of structural BMPs to address suspended solids in discharge. 10/22/12 J.Rantala,x-1011 Tables in part 14.1 Data entered to reflect site monitoring results and averages. 9/30/2013 J.Rantala,x-1011 Site Map Map updated to reflect addition of emergency generator outside prelimimary treatment building. 05/27/2014 J.Rantala,x-1011 Throughout,and Part Revisions to reflect change in 1.2. location of electronic documents, and change in staffing. MCES—June 2014 Revision St Croix Valley WWTF SWPPP Page 47 14. Schedules and Procedures for Monitoring This Facility falls into Sector T:Treatment Works of the General Industrial Stormwater Permit MNR050000(Permit);the facility specific permit identification number for stormwater discharges from this Facility is MNR0535M5. The Permit requires the following types of monitoring: • Benchmark monitoring; • Effluent limitations guidelines monitoring;and, • Impaired waters monitoring. These are described in more detail below. 14.1 Benchmark Monitoring Stormwater at this Facility is primarily sheet flow that is consolidated in swales for discharge from the plant via five stormwater outfalls. The northeast portion of the facility drains to a tarred swale,which drains into the main Facility outfall to the St Croix River. The other four outfalls consolidate flow from the plant to riprapped areas that discharge on the southeast side of the plant to a wetland area that adjoins the St Croix River. Stormwater from small portions of the facility not draining to one of the outfalls drains from the Facility in a non-specific sheet flow manner. The drainage patterns and outfalls are identified and enumerated on the Site Map(Figure 2 and Attachment B);benchmark monitoring locations are indicated on the site map as BML01 through BML06. For Sector T facilities,benchmark monitoring threshold values are specified for 5-day Carbonaceous Biochemical Oxygen Demand (CBOD5)and Total Suspended Solids(TSS). Sampling and analysis of stormwater has been conducted at this Facility for four quarters,in accordance with the provisions of the Permit. Upgrades and changes to Facility BMPs were made to address the elevated levels of TSS in stormwater samples at all of the BMLs. An additional BML,consisting of rooftop drainage from the blower/chemical building,was identified in April 2012 and was added to the Facility's permit coverage at that time. In addition,the sampling location for BML02 and BML03 were consolidated for sampling following treatment via a common BMP– which is more representative of stormwater leaving the site. This new BML is now termed BML06:Combined BML02 and BML03. The average TSS values for BML01 and BML04 were above the threshold values. These monitoring stations will therefore be required to sample in the fourth permitting year,beginning in October,2013. It is anticipated that the changes to BMPs that have already been initiated will MCES—June 2014 Revision St Croix Valley WWTF SWPPP Page 48 result in fourth year averages below the threshold values;no further changes to BMPs at this Facility are planned at this time. Timing ofsamp/e collection Samples were collected within 30 minutes of measurable runoff event at each benchmark monitoring location to the extent feasible. • If a sample wasn't collected within first 30 minutes,an explanation was provided on the Stormwater Monitoring Report (SWMR)for the respective monitoring interval. • If a sample was not collected during the monitoring interval because there was no measurable discharge from the BML for that period,the SWMR reflects"No Flow". However,if a sample wasn't collected during a specific monitoring interval, Facility staff attempted to obtain a substitute sample during a runoff event in the next monitoring interval,but not within 72 hours of another sample. Collection method Samples at this Facility were collected manually by grab sample at the benchmark monitoring locations. Stormwater monitoring sampling kits –which contain the appropriate sampling containers an d preservatives and/or instructions,were provided by the MCES laboratory and delivered to the laboratory within relevant holding times for analysis and reporting on the SWMR. Sampling Data Summary Data collected from sampling events are recorded in Tables 5.a,5.b,5c, 5d,5e(new)and 5f(new combined)for the benchmark monitoring locations. A comparison of the averaged values to the appropriate benchmark monitoring values is included in Table 5g. Additional monitoring in the fourth year for BML01 and BML04 is required to comply with the Permit. Table 5a. Sam lin Data Summary BML01: NE As halt Swale to Outfall I Period 1: ❑No flow 10/12/11 CBOD5 7.6 Oct-Dec,2011 10/20/11 TSS 49 12/14/11 CBOD5 38 12/14/11 TSS <25 Period 2: 03/12/12 CBOD5 8.2 Jan-Mar,2012 ❑No flow 03/12/12 TSS 328 Period 3: 04/16/12 CBOD5 6 Apr-Jun,2012 ❑No flow 04/16/12 TSS 21 05/03/12 CBOD5 13 05/03/12 TSS 67 05/24/12 CBOD5 8.5 05/24/12 TSS 24 MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 49 ( vy2 'S a g -f mF }er. 3 4 06/14/12 CBOD5 8.7 06/14/12 TSS 56 Period 4: CBOD5 Jul-Sep,2012 ®No flow TSS Substitute/extra CBOD5 Sample 10/13/12 TSS 20 04/24/14 CBOD5 2.30 04/24/14 TSS 22 04/28/14 CBOD5 1 04/28/14 TSS 20 Average CBOD5 7.43 TSS 75.38 Table 5b. Sam lin Data Summa – BML02: East Ri•ra• Outfall 1 3 mm"''` ''x .^fig '"� ,. A ' ' .:''` , i ` 's;?,,,,-,,,,,c,,,,' y° ,_. fit _;; , x � >g �_ ?. a� ,.r Period 1: 10/12/11 CBOD5 7.4 Oct-Dec,2011 ❑No flow 10/20/11 TSS 92 12/14/11 CBOD5 <25 12/14/11 TSS 42 Period 2: 03/12/12 TSS 03/12/12 CBOD5 4 Jan-Mar,2012 ❑No flow 0 225 Average CBOD5 3.8 TSS 119.67 Permit covers-e administrative! amended on 04/19/2012 to eliminate this ou all. Table Sc. Sam lin Data Summa –BML03: East Ri ra Outfall 2 , vs. s -. -„ " .- , :.'`�¢2,_ �,<.i •`}; a. ,_"'- '4''''''., e`u`.4 -z,a._ ?^ a- w° ...ws 9_ a Period 1: 10/12/11 CBOD5 13 Oct-Dec,2011 ❑No flow 10/20/11 TSS 129 12/14/11 CBOD5 <25 12/14/11 TSS 87 Period 2: 03/12/12 TSS 03/12/12 CBOD5 7 Jan-Mar,2012 D No flow 0 256 Average CBOD5 6.67 TSS 157.33 Permit coverage administratively amended on 04/19/2012 to eliminate this outfall. t MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 50 I , Table 5d. Sam n Data Summa ML04 East Ri•ra. Outfall 3 Period 1: 10/12/11 CBOD5 >23 Oct-Dec,2011 ❑No flow 10/12/11 TSS 99 12/14/11 CBOD5 <25 12/14/11 TSS 26 Period 2: 03/12/12 CBOD5 6.2 Jan-Mar,2012 ❑No flow 03/12/12 TSS 340 Period 3: 04/16/12 CBOD5 2.3 Apr-Jun,2012 ❑No flow 04/16/12 TSS 14 05/03/12 CBOD5 9.6 05/03/12 TSS 60 05/24/12 CBOD5 6.5 05/24/12 TSS 9 06/14/12 CBOD5 4.7 06/14/12 TSS 42 Period 4: CBOD5 Jul-Sep,2012 No flow TSS Substitute/extra CBOD5 Sample 10/13/12 TSS 26 04/24/14 CBOD5 2.20 04/24/14 TSS 13 04/28/14 CBOD5 <1.0 04/28/14 TSS 15 Average CBOD5 7.47 TSS 77 Table 5e. Sampling Data Summary BML05 Combined BML02 and BML03 .. :��,.� . ��r ' rte. s' � �` ` �-�'� Permit coverage administratively amended on 04/19/2012 to add this outfall. Period 3: 04/16/12 CBOD5 1.5 Oct-Dec,2012 ❑No flow 04/16/12 TSS 4 05/03/12 CBOD5 12 05/03/12 TSS 100 06/14/12 CBOD5 5.8 06/14/12 TSS 36 Period 4: CBOD5 Jan-Mar,2013 0 No flow TSS Substitute/extra CBOD5 Sample 10/13/12 TSS 9 Average CBOD5 6.43 TSS 37.25 Table 5f. Sampling Data Summary–BML06: Blower Bldg Roof Outfall It MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 51 { i x ..a ,., v;} r , ,„ o n_,4 a„zit_ e� �3ro vrII 1;,1 2a4nnawR x. ..r a .... v as n,W . x .y-" Permit coverage administratively amended on 04/19/2012 to add this outfall. Period 3: 04/16/12 CBOD5 1.4 Oct-Dec,2012 ❑No flow 04/16/12 TSS -1 05/03/12 CBOD5 4.1 05/03/12 TSS 46 05/24/12 CBOD5 4.1 05/24/12 TSS 3 06/14/12 CBOD5 6.2 06/14/12 TSS 12 Period 4: CBOD5 Jan-Mar,2013 0 No flow TSS Substitute/extra CBOD5 Sample 10/19/12 TSS 15 10/31/12 CBOD5 3.95 10/31/12 TSS 15.30 Average CBOD5 3.95 TSS 15.3 Table 5..Com•arison of Avera.ed Benchmark Values and Sector T Threshold Values o.,,,:t;:,,: .r t j sr 3a 3 .may a"c tt. k ,3 ea-.S,..l...,., «. '::„-,1., BML01:NE Asphalt Swale to Outfall CBOD5 7.43 25 TSS 75.38 65 BML02:East Riprap Swale 1 _ CBOD5 Inactive station 25 TSS 65 BML03:East Riprap Swale 2 CBOD5 Inactive station 25 TSS 65 BML04:East Riprap Swale 3 CBOD5 7.47 25 TSS 77 65 BML05:Blower Bldg Roo Outfall CBOD5 6.43 25 TSS 37.25 65 BML06: Combined BML02 and BML03 CBOD5 3.95 25 TSS 15.3 65 14.2 Effluent Limitations Guidelines Monitoring Sector T facilities are not subject to effluent monitoring provisions in the Permit. 14.3 Impaired Waters Monitoring t MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 52 This Facility discharges stormwater to a receiving water that is impaired for PCBs(listed in 2006)and is within 1 mile of Lake St Croix,which is impaired for aquatic/recreational use based on excess phosphorus(listed in 2008). There are no TMDLs for the St Croix River that have been approved,completed,proposed or in progress;a TMDL(10465)for Lake St Croix is underway. At this time,there is no additional monitoring required by a TMDL for this Facility. MCES—June 2014 Revision St Croix Valley WWTP SWPPP Page 53 [Attachment A: General Site Map Seven County Metropolitan Area Vii.. �.!11 � ��rrl i^ 6S ey g tft ley � Ellatliji No ,j_ , wpm,1111111511 ° •u1 MCES-St Croix Valley WWTP T3ON,R20W,Section 34,Oak Park:1 Heigh ,Wo , Scale:10,000;Map tsashingtsource:MCES n County Sta ,8 09 Minnesota ff /10/ 116 ii ., ..fr,.,. .,,,,,:,.,....,,,.,,...vc.i.,..s :V A: ' , � \'''' 1076-/ N.-t.t' e I ' 1.4' - 3 ;11.-,':"..'; r."',-14,AVtriAt .''`iii,' tt, ", ,.-, •••`'.,A ,,‘, �f 'i t 7 J 4 - 11TN STN s` 'x",+p t ` A re rn-.",or.' f r.' + -. t ` ''• �j_. �';/ 'r" ,# a 'fi 4s r1 4V \ N` .T 1 M ) **°''.---'• r ' b x � � 1'te '" .'�' ' : *� e. T ,--.. rn..$ �' k""x %rt!'- ` ,1 \ :R, , +�f z Attachment B: Site Map . • tae--S-SFC wtx 1ICt.(.lu j W WTO 1,4N/zoos-my . - AzN; >,. SWPP T ,• 21 ^i1,33-..... .. y /1 ...Ma ORM MVP .. , r•cu.vur MIL nows� ..t, *' y�metre.u.s m _ `• '461 —.� -� • � Qr ice.::`__ �,�u. ,� � �'"- A'► �t� ;� r1 1, 41 gehrx 1 11 litufre..--) mo.,,_/ • ��.Y .ra ��� ( i I1/tw RIM C11 '•°R'ra sw11°0e xu se.nsM ,y , 1,107111161.1.WM PRe je, WOE 1M� _ ,._a 2. j ., S . rn snwrw °sue m r1 > cw]w.e �'�'"'yl swie,esr�.,reon�• ---ru.>� 9,1 i t ii.n._,00-,e K. M, "' 1�I 4 u©w ► / 1, ® ' 4 05 (t` veac w,s • )ifi�t b 1 c av 9] .I \I! jr �� � , ]10.N�, � �f��I ..tar „,,,, 'r” _1� ,11, , \ � j r. At tu jr, N _...44 Iii: se , c jh, q Ica_vr ',.:0 glikkai...f. k.... linli'"-lkiltikl vali...........7rmak:4_ reBe .Y I(•16N r . ...api_03....,\., \ i a M s �.e:�c{� j . . i s ii 0 n �. 0 SKIM u �.' � . �� ® \ �� ipIIIIILIIr . I ` VII qF: r o ❑ v s .' �o� ^` ; ° \,'' (( iq^ , .� , , . ]o.g r_ ir • t S'iiit1 \ A w ;� ]m o �ao %.r w -b I i D ' I . tat 7,2` a ]oe o Ws ; f�evv= , t ua c . fL-6 9 I it's � r .]o RE i, 4 i't_. \ 1 ...1 % er • 1114699 4rtv5i, , .....:. -"""A b�VS \ r \` lift ' se[Its TKAM'1 1➢4 i 1 I `� � \. AIL 9 r. r ` \ /1 Mil,1■71.7 00 li v ` ...1,.... , 6., lir ‘n]sE- IA ��� \\ -na • Tv- Hasa —'.' '�(� -•y'�.... �J It ire\ 0 V `\ A-- - F$4CiSsisit}F. w.vrra snrm MOWS PALMER Aµ w'- .s excmEERMQa`CONSTRUCnoe f11ETROPOLITRf1 WRITE sa...•L.o•.«MA ,• = - ---'« , .am: DEPARTMENT COf1TROL COMM .- 5.?LW-WM MCES-St Croix Valley WWTP Permit ID Number: MNRO535M5 List of Significant Materials `' 11 u k, '4.C:" .>... SM-01 Raw or partially treated wastewater SM-02 Screenings SM-03 Grit SM-04 Activated carbon SM-05 Scum SM-06 Sludge SM-07 Aluminum sulfate(alum) SM-08 Diesel fuel SM-09 Generator exhaust SM-10 _ Grass clippings SM-11 Pesticides SM-12 Fertilizers SM-13 Herbicides SM-14 Insecticides SM-15 Fungicides SM-16 Rodenticides SM-17 Windshield washer fluid SM-i8 Unleaded fuel SM-19 Oils,greases&lubricants SM-20 Oil filters/rags SM-21 Partswasher SM-22 Boiler treatment additives SM-23 Salt SM-24 Vehicle wash water from sludge trucks SM-25 Water softener salt SM-26 Small amounts of unrelated materials SM-27 Used lamps(including UV disinfection lamps) SM-100 Exposed soil SM-200 Material stockpiles SM-O Significant materials brought on-site/in use by MCES contractor or trades staff 4/2012 Attachment C. Verification of Permit Coverage Minnesota Pollution ` Control Agency COVERAGE CARD Industrial Stormwater Multi-Sector General Permit MNR050000 The facility listed below is authorized by the Minnesota Industrial Stormwater Multi-Sector General Permit. This Permittee shall follow all of the requirements under the MPCA Industrial Stormwater Multi-Sector General Permit MNR050000 for the named industrial facility. The facility listed below has completed and shall follow their Stormwater Pollution Prevention Plan (SWPPP)as required by MNR050000. Industrial Activities authorized under this permit SIC Industrial Activi Industrial Subsector Industrial Sector reatment Works with design flow of 1 mgd T1 Treatment Works T Treatment Works •r more or are required to have an pproved pretreatment program under 40 FR .t 403 If you have questions regarding the stormwater program for industrial activity, please access the MPCA's stormwater web site at http://www.pca.state.mn.us/water/stormwater/stormwater-i.html, or call the Program Administrative Lead at 651-757-2089. Permit ID Number: MNR0535M5 Beginning Date: 9/23/2010 Owner: Metropolitan Council Operator: Metropolitan Council Environmental Expiration Date: 4/5/2015 Services Facility: MCES -St Croix Valley WWTP ISW 6163 St Croix Trl Oak Park Heights, MN 55082 Post this Coverage Card in a visible location Minnesota Pollution Control Agency Thursday,September 23,2010 William Moore Metropolitan Council 390 Robert St N St.Paul,MN 55101 RE: NPDES/SDS Industrial Stormwater General Permit Application Permit ID Number:MNR0535M5 Facility Name:MCES-St Croix Valley WWTP ISW Facility Address:6163 St Croix Trl,Oak Park Heights,MN,55082 Dear William Moore, The Minnesota Pollution Control Agency(MPCA)has received and approved your application for permit authorization for industrial stormwater discharges pursuant to 40 CFR 122.26(b)(14)and Minn.R.ch.7001,7050,and 7090. Industrial Activities authorized under this permit SIC Industrial Activity Industrial Subsector Industrial Sector N/A Treatment Works with design flow of 1 mgd or more or are T1 Treatment Works T Treatment Works required to have an approved pretreatment program under 40 CFR pt 403 Read and follow all applicable permit requirements. For a copy of the permit in its entirety,or if you need additional information about the Industrial Stormwater Multi-Sector General Permit including Frequently Asked Questions,a SWPPP template and checklist,the BMP Guidebook,and Sampling Guidance Manual go to:http://www.pca.state.mn.us/water/stormwater/stormwater-i.html If you have questions contact the Industrial Stormwater Hotline at 651-757-2119 or 800-657-3804(non-metro only),or the Industrial Stormwater Administrative Lead at 651-757-2089. For Internal Use Only Transaction#: 58631614 Permit#: MNRO535M5 Minnesota Pollution Control Agency 520 Lafayette Road North Saint Paul,MN 55155 Narrative Activity and/or SIC Code yy i�iy yy,,�� y �a �, a s•:. ,;ss€' -:�a f °� c .�`��'t7..� .. . � '*� kn='T x. .kti u.�'�:1K�:a. _ .a,..r. ti:�: 1,.,... . ., x•;z:"���,x,."s, Treatment Works with design flow of 1 T1 Treatment Works T Treatment Works mgd or more or are required to have an approved pretreatment program under 40 CFR pt 403 Facility Information Facility Location MCES-St Croix Valley WWTP-SW 45.06139755 d Metropolitan Council �.. -92.84364319 rrt 6163 St Croix Trl r ni 1 Digitized-DOQ {Oak Park Heights,MN 55082 , Wit.,.. 8/8/2000 4 11.30 ;y.Ff--jf..J. 2,Washington Description of Industrial Facility Operations Operation and maintenance of wastewater treatment facility. Owner Permittee Operator Contact 117:74::::glia Metropolitan Council z c Metropolitan Council Environmental Services William Moore,General Manager,ES Patricia Oates,Business Unit Manager,EBU william.moore @metc.state.mn.us ' patricia.oates @metc.state.mn.us 651.602.1162 651.602.4911 390 Robert St N Wat,IWZgat 390 Robert St N Empire St.Paul,MN 55101 Vim, St Paul,MN 55101 Facility Contact y ` Metropolitan Council Environmental Services € -_v =ti;Mary Gail Scott,Manager,EC marygail.scott@metc.state.mn.us 651.602.1073 t Z r. 390 Robert St N 77,' St Paul,MN 55101 9/23/2010 Page:1 of:2 For Internal Use Only Transaction#: 58631614 Permit#: MNR0535M5 Minnesota Pollution Control Agency 520 Lafayette Road North Saint Paul,MN 55155 Waterbodies &.�f St Croix River(Apple R(WI)to Willow R(WI)) River Y Y Y Monitoring Locations BML04:East Riprap Outfall 3 45.038440 -92.791170 Digitized-Permit Application Map 9/22/2010 BML03:East Riprap Outfall 2 45.0384 -92.791170 Digitized-Permit Application Map 9/22/2010 BML02:East Riprap Outfall 1 45.0384 -92.791210 Digitized-Permit Application Map 9/22/2010 BML01:NE Asphalt Swale to Outfall 45.038410 -92.791090 Digitized-Permit Application Map 9/22/2010 Monitor Subsector , s BML04:East Riprap Outfall 3 Ti:Treatment Works BML03:East Riprap Outfall 2 Ti:Treatment Works BML02:East Riprap Outfall 1 Ti:Treatment Works BML01:NE Asphalt Swale to Outfall Ti:Treatment Works Does this facility have a monitoring location from which a discharge flows to and is within one mile of an Outstanding Resource Value Water,303d listed Impaired Water,Trout Stream,Trout Lake,or Wetland?Y Permittee certifies under penaly of law that this document and all attachments were prepared under their direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Permittee certifies that based on their inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information,the information submitted is,to the best of their knowledge and belief,true,accurate,and complete. Permittee has certified they aware that there are significant penalties for submitting false information,including the possibility of civil and criminal penalties. 9/23/2010 Page:2 of:2 Attachment D. Inspection Form for MCES-St Croix Valley WWTF It Metropolitan Council Environmental Services Industrial Stormwater Inspection Form MCES- St Croix Valley WWTF, MNR0535M5 Instructions: Gather Site Map,List of Significant Materials and Table 3 from the SWPPP for this Facility. Complete an Inspection Form each month;at least one per year must be during a runoff event. Maintain Inspection Form and supporting documentation with the SWPPP(Attachment D)for at least three years from the date of the inspection. Be sure to indicate any corrective actions needed and date completed on this form. Send copy of completed Inspection Form to EC staff only if changes to the SWPPP,Site Map or Significant Materials list are indicated by inspection. Part 1. Inspection Details Date and time of inspection: Name of inspector: Site conditions during inspection: If runoff conditions exist,indicate total accumulation from ❑Dry or frozen conditions event,in inches,or indicate"melt event"': ❑Runoff conditions with samplingt,5 ❑Runoff conditions without sampling' ❑Wet,not runoff conditions If runoff event without sampling,indicate reason for no sample: Weather conditions: I Indicate total accumulation for the precipitation event,to the nearest tenth of an inch. For less than 0.1",indicate"Trace". Use data from the nearest MCES rain gage station(http://es.metc.state.mn.us/cims/climate/precip chart.asp). Part 2.Significant Activities and Materials ^A. keeiesofeeen eetheities**funky the t (dam). Have any spills at the Facility resulted in a release to the 0 Yes U]No environment or resulted in other potential exposure to stormwater? If yes,indicate spill material and date(s)of spill event(s): Any salt or sand applied to roads? ❑Yes ❑No Any street sweeping? ❑Yes ❑No If es,indicate date: Any permanent changes(construction/project)made at facility? 0 Yes2 ❑No Plan revision may be needed. Review list of Significant Materials and Site Map,marking up as needed to reflect site conditions. Send changes with completed Inspection Form to EC staff to revise the Site Map and/or SWPPP. If site conditions indicate changes to the Site Map or SWPPP are needed,the Plan must be updated prior to submittal of the Annual Report for the reporting period. B.Review Significant Materials List for this Facility;the list should be complete and accurate Is the list a complete and accurate representation of Significant ❑Yes ❑No2 Materials present at the Facility at the time of the inspection? C.Review the location of each Significant Mateiial at the Facility as indicated.on the Site Map. Are the map designated locations accurate and complete? ❑Yes ❑No2 Are any contractors or trades staff conducting work on-site at - ❑Yes2 ❑No time of inspection that may potentially affect stormwater? Any construction with disturbed soil at time of inspection? ❑Yes3 ❑No If yes,total disturbed area is: ❑>1 acre,activity covered by permit no. ❑<1 acre Are there any stockpiles of Significant Materials on-site at the ❑Yes2 ❑No time of the inspection that are not currently on inventory? 3 If the project disturbs more than 1 acre,make a copy of the Site Map and mark up to indicate disturbed area and indicate the permit number covering the activties. For projects<1 acre in size,make a copy of the Site Map and mark up to indicate disturbed area,as well as all temporary BMPs and/or BMP maintenance activities at the time of inspection. Staple the marked up Site Map to the Inspection Checklist and maintain with Checklist. Part 3. Best Management Practices(BMPs) A.Review areas at the Facility that are indicated as a Structural BMP on the Site Map. Are all BMPs in place and functioning properly? ❑Yes ❑No4 If no,indicate corrective action taken and date completed: Are rip rap areas reasonably free of vegetation? ❑Yes El No4 If no,indicate corrective action taken and date completed: Are vegetated areas in good condition? ❑Yes El No4 If no,indicate corrective action taken and date completed: Are structural BMPs and areas nearby free of evidence of ❑Yes ❑No4 erosion? If no,indicate corrective action taken and date completed: Are impermeable surfaces reasonably free of salt,sand,detritus ❑Yes El No4 and/or other debris? If no,indicate corrective action taken and date completed: 4Conective action needed;appropriate corrective action must be initiated within 30 days of discovery,and functionality of BMPs restored to full operation as soon as field conditions allow. Are all Significant Materials stored indoors or under cover? • Yes n No2 Are containers with Significant Materials plainly labeled? ❑Yes ❑No4 If no,indicate corrective action taken and date completed: Is inventory of Significant Materials maintained on-site ❑Yes El No4 managed appropriately for current and anticipated needs at the Facility(excess inventory minimized)? If no,indicate corrective action taken and date completed: Is housekeeping of Significant Materials(point-of-use issues) ❑Yes El No4 acceptable at time of inspection? If no,indicate corrective action taken and date completed: Are Spill Response Materials adequately stocked? ❑Yes El No4 If no,indicate corrective action taken and date completed: Are training,SOPs and fuel/chemical delivery provisions up-to- El Yes ❑No4 date and being implemented at Facility at the time of the inspection? If no,indicate corrective action taken and date completed: Part 4. Outfalls and Sampling A.Review the location of stormwater outfalls at the Facility as indicated on the Site Map. Are the map designated locations accurate and complete? ❑Yes El No2 Are outfalls stable and functional(no evidence of erosion or El Yes ❑No4 intrusion)? If no,indicate corrective action taken and date completed: Water flowing from outfall? ❑Yes ❑No If yes,was the runoff free of discoloration,sheen,foam and ❑Yes ❑No4 ❑N/A floating items? If no,indicate corrective action taken and date completed: If yes,was sample taken during inspection? ❑Yes' ❑No6 If a sample is taken,it should be taken within the first 30 minutes of a runoff event,if possible. If not possible to collect the sample within the first 30 minutes,an explanation of why this was not possible should be maintained with test results. Staple any test results and explanation,if applicable,to the relevant Inspection Form. 6If water was flowing from outfall but a sample was not taken,indicate reason in Part 1 of form;e.g."quarterly sample already taken"or "sampling not required". c Attachment E. Annual Report Form II 1 Cant of Agency Pollution Industrial Stormwater 9 y 520 Lafayette Road North Annual Report Form St.Paul,MN 55155-4194 NPDES/SDS Industrial Stormwater Multi-Sector General Permit Due March 31, 2014 Doc Type:Permitting Annual Report If this is the first time you have ever completed an Annual Report,it should cover the dates starting when the facility received permit authorization to December 31st of the reporting year. The purpose of the Annual Report is to: • Summarize compliance with National Pollutant Discharge Elimination System/State Disposal System(NPDES/SDS)Industrial Stormwater Permit during the reporting year. • Assure that the Stormwater Pollution Prevention Plan(SWPPP)adequately represents facility conditions. • Assure that Best Management Practices(BMPs)are working properly to manage industrial stormwater discharges. Do not use this form to make changes to your Industrial Stormwater Permit coverage. Please use the Administrative Change Form (wq-strm3-60)found on the Minnesota Pollution Control Agency(MPCA)webpage at: httD://www.Dca.state.mn.us/xclgxl4d7. Instructions:The Annual Report must be submitted electronically to the MPCA by either the owner or the operator of the facility. All questions with an asterisk(*)are required fields,and must be completed before the form will be transmitted electronically. PDF version:Save the form to your computer and send to the MPCA by using the'Submit'button at the end of the form. MS Word version:Save the form to your computer and send to MPCA as an e-mail attachment to isworoaram.Dca(a.state.mn.us. If you do not receive an e-mail confirmation receipt within two business days, please contact the Industrial Stormwater Program.at iswDrogram.Dca @state.mn.us. Questions: Contact MPCA staff by calling the Stormwater hotline at:651-757-2119 or 800-657-3804(non-metro only). 2013 Reporting Year *Beginning date: ,2013 to December 31,2013. If you received permit coverage in 2013,the beginning date is the date your facility received permit authorization.Look for this date on your facility's permit coverage card. If you received permit coverage prior to January 1,2013,enter January 1 in this box. Facility Information *Facility name: *Facility address(physical location): *City: *State: MN *Zip code: *Permit No./Facility ID No. (ex.MNR053XXX,the number on your coverage card): *Facility contact name: SWPPP Information *1 a. Provide a summary of inspection dates,results,BMP maintenance,and oil and grease inspection results,if applicable.See Part VII of the permit to determine if oil and grease inspection requirements are applicable.(Permit References:IV.B.7.a.1,IV.B.7.a.2) Note:If you did not do an inspection,place the word"none"in the field.The form will not submit without the fields filled in. Results of Inspection oil/grease Inspection date inspections (mm/dd/yyyy) Inspection results BMP maintenance (if applicable) 1 2 3 www.pca.state.mn.us • 651-296-6300 • 800-657-3864 • TTY 651-282-5332 or 800-657-3864 • Available in alternative formats wq-strm3-55 • 12/31/13 Page 1 of 4 4 5 6 7 8 9 10 11 12 *1 b. Was a minimum of one inspection per calendar year conducted during a runoff event?(Permit Reference:III.F.1) ❑Yes ❑No Date of inspection(s): 1c. The following sectors have additional sector-specific inspection requirements:A,C, D, E, F,G, H, I,J,L, M,N,0, P,Q,R,S,T, U,V,AA,AB. See Part 5.d. of Part VII of each"sector chapter"for your sector-specific inspection requirements. Provide a summary of the inspection results if your facility falls within these sectors.(Permit Reference:VII.5.d) Sector letter Sector-specific inspection results Frequency of inspections Example: Example:During my monthly inspections, I inspected all Example:lam required to conduct two of my monthly Sector M areas where hazardous materials and general automotive inspections during precipitation event, which I did,in fluids are stored, and there were no signs of spilled materials September and November.Both times,no pollutants on the ground. were observed during either inspection. www.pca.state.mn.us • 651-296-6300 • 800-657-3864 • TTY 651-282-5332 or 800-657-3864 • Available in alternative formats wq-strm3-55 • 12/31/13 Page 2 of 4 *2a. Does the SWPPP accurately reflect facility conditions? ❑Yes ❑No If no, modify your SWPPP.(Permit Reference: IV.B.7.a.3) *2b. Were any newly exposed significant materials identified at the facility during the reporting year? ❑Yes ❑No If yes, modify your SWPPP.(Permit Reference: IV.B.7.a.4) 2c. Summarize below any SWPPP modifications made since receiving permit coverage at the facility.(Permit Reference: IV.B.7) *2d. Yearly staff training: Provide the date(s)of the required 2013 Industrial Stormwater annual staff training: (Permit Reference: III.K) *3. Has a review been conducted to determine if the facility is discharging to any newly listed impaired waters that are within one mile of the facility during the reporting year? ❑Yes ❑No Impaired Waters Search Tool:http://www.oca.state.mn.us/mvri1126 Note:Only review impaired waters that are impaired for the facility's required monitoring parameters(Part VII of the permit)or pollutant surrogates,check language listed on Page 26 of the permit. Are there any newly listed impaired waters within one mile of the facility? ❑Yes ❑No If yes,list those waters below and modify your SWPPP.(Permit Reference: IV.B.7.a.5) Note: If"year 2"benchmark value averages are exceeded and the facility discharges to an impaired water,the facility SWPPP must be updated no later than 30 days past the discovery of the exceedance.The facility must implement necessary non- structural BMPs no later than 60 days after discovery of the exceedance and structural BMPs no later than 180 days after discovery of the exceedance. *4. Has the facility been subject to any U.S. Environmental Protection Agency-approved Total Maximum Daily Loads(TMDLs) during the reporting year? ❑Yes ❑No Important Note: If yes,please review Part 1.B.j regarding eligibility for this permit.For information on TMDLs,visit: http://www.oca.state.mn.us/Oaoxa04.(Permit Reference: IV.B.7.a.6) 5. Provide a list of spills and leaks(as defined in Minn.Stat.§115.061)that occurred at the facility during the reporting year. (Permit Reference: IV.B.7.a.8) www.pca.state.mn.us • 651-296-6300 • 800-657-3864 • TTY 651-282-5332 or 800-657-3864 • Available in alternative formats wq-strm3-55 • 12/31/13 Page 3 of 4 6. If applicable, provide a summary of all mobile industrial activities conducted by the facility during the reporting year. (Permit Reference:IV.B.7.a.9) Description of activity(include Locations where the mobile activity occurred Length of time SIC code and/or Narrative Activity) (include latitude/longitude coordinates) at each location gill III Owner or Operator Certification (*Required fields) I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system,or those persons directly responsible for gathering the information,the information submitted is,to the best of my knowledge and belief,true,accurate,and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment.By typing my name in the following box I certify the above statements to be true and correct,to the best of my knowledge,and that this information can be used for the purpose of processing my application. ❑*I agree *Owner/Operator name: *Date: (This document has been electronically signed.) (mm/dd/yyyy) www.pca.state.mn.us • 651-296-6300 • 800-657-3864 • TTY 651-282-5332 or 800-657-3864 • Available in alternative formats wq-strm3-55 • 12/31/13 Page 4 of 4