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Town Engineer notes.05.29.2003 05/30/2003 11:12 5187867299 CT MALE ASSOCIATES PAGE 02/03 C,T. MALE ASSOCIATES, PC. 50 Century Hitl Drive,P.O.Box 727,Latham,New York 121 M0727 518.786.7400 FAX 5183M.7299 ctmale@ctmaie.com May 29,2003 Mr.Craig Brown Zoning Administrator.Code Compliance Officer Town of Queensbury 742 Bay Road RECEIVED Queensbury, New York 12804-5902 HI�,Y 5 0 Ctji,•3 Re: SP 27--2003 Warren Tire - Ldfayette Street TOWN OF QUEENSBURY PLANNING OFFICE Dear Mr. Brown: As requested, we have reviewed the stormwater and lighting components of the submission, package for the above referenced project. The information we reviewed included the Site P1an:Review application package, Plan Sheets 1 - 5 of 5 (dated April 15, 2003), and a Stortnwater Management Report. The documents were prepared jointly by Miller Associates, Nace Engineering PC and VanDusen & Steves Land Surveyors, LLC_ Based on our review of these documents, we offer the following cornment3: Regarding Stormwater 1. The proposed new .invert into the existing catch basin at the northeast corner of the site is lower than the invert of the pipe leaving this structure. The plans should be revised to address this issue. 2. The detention basin located between the new building and Lafayette Street does not provide treatment of the water quality volume per the NYS Stormwater Management Design Manual. A treatment component must be added, to the design to address this issue, 3. The gravity sewer lateral that services the existing building traverses the proposed detention basin l: there adequate clearance between the sewer lateral and the bottom of the basin? Can the basin be reconfigured to have the low point of the basin avoid the sewer lateral? 4. The grading around the detention basin near Lafayette Street does not eliminate the street drainage from going to the detention basin. A berm (with spot elevations) could be installed between this basin and Lafayette Street that would prevent the street runoff from entering the on-site detention basin. The calculations do not include the runoff f-om the street, the grading plan should be consistent with the calculations. 5. A minimum voluni for the temporary sediment traps shown on Drawing SP-3 should be specified on the plan consistent with the NY Guidelines for Urban Erosion and Sediment Contr61, i.e. 1,800 cf per acre of tributary watershed. Architecture&Building Systems Ergineering • Civil Engineering ,Environmental Services - Survey&Land Intormation Services 05/30/2003 11:12 5187867299 CT MALE ASSOCIATES PAGE 03/03 C.T. MALE ASSOCIATES, P.C. May 29,200.3 W. Craig Braum Page 2 6, The oil water separator detail on Drawing SP-5 provides an oil storage volume of 3 cif (2'x3'xo.S') which seems small. .Additionally the opening in the baffle wall is nearly at the same!elevation as the bottom of the outlet tee. A greater separation between the opening and the bottom of the tee and/or a downward tee extension seems warranted to avoid oil transfer through the outlet tee. 7. Some of the features on the proposed conditions drainage map in the stormwater report appear to be mislabeled. For example,pond 1 appears twice. 8. The runoff simulation for the existing conditions assumes 100% impervious cover. It is not possible to confirm this based on the information submitted. It would appear that there should be some pervious area on the existing site. This assumption increases the existing rate of runoff and decreases the amount of detention needed in the post-developed condition. 9. The outlet for the detention basin near Lafayette Street (Pond 2) is modeled as having an invert eevation of 332.0, which is inconsistent with the information shown,on the plansj.e. 328.8'. Regarding Lighting 10_ It is not clear whether the uniformity ratio in the Town code is met for this site. Based on the soffitt.light layout, it appears that the rear parking area will not be illuminated and maj need an additional cut-off fixture. Miscellaneous U. On Drawing SP-1 tl a water service should be extended to the existing water main which is on the east tide of Lafayette Street. The plans should include a detail of the pavement restoratioh associated with the installation the water service, assuming that it will be open 4�ut. The line on the west side of Lafayette Street appears to be mislabeled. If you have any questions related to our comments,feel free to call our office. Sincerely, C.T.MALE ASSOCIATES, P.C. ,�yr. '.James Houston,P.E. nior Civil Engineer c: Applicant k�projeclx100C)1rg7Mn10r�iMxl.nrmn Ilra_IP9yMIe�2o03.05,99.commnic,nx