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Home My WebLink About2001-01-16 NAC Memo Re Pony Express Auto WashMEMORANDUM NORTHWEST ASSOCIATED CONSULTANTS, INC. TO: Tom Melena FROM: Scott Richards DATE: January 16, 2001 RE: Oak Park Heights — Pony Express Auto Wash FILE NO: 798.02 -- 00.19 5775 Wayzata Boulevard, Suite 555, St. Louis Park, MN 554'16 Telephone: 952595636 Facsimile: € 62.595. 3837 plannersrciThacplanning.corn The Planning Commission, at its January 11, 2001 meeting, voted unanimously to recommend approval of the site plan, Design Guideline review, and conditional use permit to allow the construction of a 10,186 square foot drive- through car wash on Neal Avenue. The subject property, directly south of the Arby's restaurant, is zoned B -2, General Business District. A conditional use permit is necessary because drive-through g car washes are conditionally permitted uses in the B -2 District. Approval of the car wash is also subject to City Council approval of a preliminary and final plat for Lots 1 and 2, Block 1, Jacobs 2nd Addition. The Planning Commission had previously considered the car wash proposal at a public hearing in December. At that time, they asked the applicant to provide additional information related to noise, parking, grading and drainage, landscaping, and design of the building. Bill Costa, the applicant, provided information related to noise, reviewed the revised site plans and presented alternatives for building design. The Planning Commission was favorable to the noise study information (see attached) and the site plan changes. Revised landscape plans were provided and are subject to City Arborist review and approval. Mr. Costa also provided alternatives for the building elevation facing Highway 5. The Planning Commission recommended the third building elevation option with better corner detailing and a lower, more consistent parapet height and design on all sides of the building. The Planning Commission recommended the car wash project with the following conditions: 1. The City Council approves the preliminary and final plat for Lots 1 and 2, Block 1, Jacobs 2nd Addition. 2. The applicant revise the site plan to indicate sixteen (16) off - street parking stalls. 3. The final landscape plan is subject to review and approval by the City Arborist. 4. All exterior lighting shall be hooded to direct light toward the ground and away from adjacent rights -of -way at not greater than a 90 degree angle. 5. The applicant shall provide revised elevations subject to City staff approval that incorporate the detailing found in building elevation Option 3, enhanced corner detailing, and a consistent parapet height and design on all sides of the building. 6. The applicant shall submit grading and drainage plans that incorporates all drainage systems and parking areas with curb and gutter. All grading, drainage and utility plans are subject to review and approval of the City Engineer. pc: Kris Danielson Pony Express Auto Wash Oak Park Heights Auto Wash Sound Study Information 1 /10 /O1 0-1 Q 00 la 4-9 >io 0 ..r1ANGE IN SOUND PRESSURE LEVEL (-+- OR --) (v®) CHANGE IN APPARENT LOUDNESS 3 Barely perceptible 5 Clearly noticeable 10 Dramatic: Twice as loud (OR 1/2) 15 Dramatic: Three times as loud (OR '/3) 20 Dramatic: Four times as loud IOR V.) NOTES Sound is produced by a vibrating object or surface. In order for sound to be transmitted or propagated, it re- quires an elastic medium. The most common medium for transmission is the air. Such sound is called "air -borne sound." However, sound can also be easily transmitted through common building materials and components such as steel, concrete, wood and metal framing, piping, and gypsum wallboard. This type of sound is called "structure -borne sound." A- weighted decibel IdB(A)I is a standard single number rating representing the overall sound energy of a given source. The A- weighting network in a sound level meter filters sound in a manner similar to the human ear by downgrading low frequencies. FREQUENCY OF COMMON SOUNDS TYPE OF SOUND LOW PEDAL STOP ON ORGAN HIGHEST NOTE ON PIANO RANGE OF HUMAN SPEECH AREA OF MOST SPEECH 1NTELLIGIBIL!TY BALLAST HUM FROM FLUORESCENTS AND HARMONICS DESKTOP COMPUTERS WITH DtSK DRIVE OFFICE EQUIPMENT [PRINTERS, TYPEWRITERS, TELEPHONES) TRUCKS, BUSES HUMAN HEARING A- OCTAVE — A FREQUENCY RATIO OF 2:1 SOUND LEVEL (oBA) 140 1 30 120 110 100 90 80 70 60 50 40 30 20 10 0 SUBJECTIVE EVALUATIONS Deafening Threshold of pain Threshold of feeling Very loud Moderately loud Loud Moderate Quiet Very quiet Just audible 16 31.5 Threshold of hearing Birdcalls Carl J. Rosenberg, AIA; Accentech Inc.; Cambridge, Massachusetts "° "='CI BEL SCALE ` I BJECTIVE FACTORS: EFFECT OF ANGE IN SOUND PRESSURE LEVEL iecibel ldB) scale is a logarithmic scale based on 1 UF,. ids the logarithm of a ratio of sound pressures. The decibel levels of two noise sources can not be added directly; instead use this simpli difference between two sound levels, in dB add to the higher level For example: 90 dB + 20 dB = 90 dB 60 dB + 60 dB = 63 dB OCTAVE BAND An octave band covers the range from one frequency (Hz) to twice that frequency, f to 2f. LOW FREQUENCY MJD -- FREQUENCY 63 125 250 RELATIONSHIP OF SOUND LEVEL AND SUBJECTIVE LOUDNESS ENVIRONMENT OUTDOOR Near yet aircraft and artillery fire Elevated train Jet flyover at 1000 ft Power mower, motorcycle at 25 ft, auto horn at 10 ft Propeller plane flyover at 1000 ft, noisy urban street Diesel truck at 40 mph at 50 ft Air conditioning condenser at 15 ft, near freeway auto traffic Large transformer at 100 ft Quiet residential neighborhood Rustling leaves 11 FREQUENCY OR PITCH (HZ) ■ Hard rock band Inside propeller plane Face -to -face conversation, vacuum cleaner, electric typewriter General office OCTAVE B00 1000 Full symphony or band, food blender, noisy factory 2000 4000 INDOOR Inside auto at high speed, garbage disposal, dishwasher Private office, soft radio music in apartment Bedroom, average residence without stereo Quiet theater, whisper HIGH FREQUENCY COMMENTS 0 5) m c 5) 9000 ACOUSTICAL DESIGN p1 16000 31500 Test Site Product Tested: Building Housing Product Tested: Testing Equipment: Testing Performed ay: Tester's Qualifications: Testing Procedures Testing performed o n a clear day with. no wind and temperate averaging 85 degrees , �r�g was p eriod Noise sample readings were taken at 10 foot increments up to go feet during the testing p P away from the dryer. with er. The dryer was left running continuously during the test with all four 10 H.P. motors ape � g operating. All readings s are noted on the reverse side and have been. verified by Mr. Van B ruggen. MII 1net DRYER NOISE EMITTING TEST Roadrunner Car Wash 1530 E Bell Road Phoenix, AZ Hurricane Touch -Free Dryer Manufactured by Superior Car Wash Systems, Inc. Model 35.192, 4 Nozzles, 40 RP. Standard dryer without noise reduction coating 18' Wide X 12 High x 40 Long Masonry Wails, Metal Roof No sound absorbing materials used. Edmont Sound Level Meter Model 6O- -540 Manufactured by Edx ont- Wilson, Coshocton, OH David J. Van Bruggen Mr. Van 3ruggen has been a Gar wash equipment engineer since 1 967 and employed by Superior since 19&1, Note: Ambient noise levels from street tr2 fc, etc_ measured 65 dB. with dryer not running. Testing procedures on the reverse side. 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