10300 1ST PL W 2016-01-01 MF Import

PROJECT OUV� N RKz1� �&s-�R-'I�o�J BY. SHEET N0. SMONOYI7M COUNfT Tk �� t 1� 1� 2 P�o LOCATION ,� �� ,a� St �-�1'�2'E'CT . P CHK. W.O. N0. nosuc umm asrner H. + DATE I ��4 3 C. . 2196 6/83 , , � � i I � }— I � � � � � �- I �, ,�, i � I � 1 I i �- . . DEVELOPED The designated wetland area of the site together with a - twenty-five foot 6uffer will remain undisturbed and undeveloped _ �q - p,z7 acre, C = 0. 10) . The remaining 1 .52 acre will he _ covered w,th concrete paved driveway or concrete slabs (C = 0.90> , gravel surfacing (C = 0.80) and landscaping fC = 0.20) . qn underground pipe detention system will be constructed ta - detained the increased rate of drainage runof4 . Rn oil stop _ .? � valve will be installed in the upper portion of the detention _ system to provide a preventive oil contai�ment storaae system for , any possible oil leak due to accidental trans4ormer' s rupture. i'„�.,, Although the site is NOT classified as high risk land usage such as gas stations, auto parts stores, convenience stores with 4ue1 M1`� islands, and auto wrecking yards, a grass-lined swale will be _ constructed from the pipe outlet to the designated wetland area _ on the west side of lst Place West to provided added protective measure for filtering the drainage system during low flow discharges. _ Offsite drainage entering the site from the west will be collected hy a perforated underdrain and catch hasins system _ installed along the westerly landscaping area, by-passed the on- ' site detention system and discharged to the wetland area. � Offsite drainage entering the site from the north will be collected by an underground drainage system installed along the northerly landscaping area� by-passed t�e on-site detention system and discharged to the closed drainage system on lassPthee West. About 0.70 acre cf the lands�aped areas will by-p detention system. �� .._�� -,-1— I �� I ' �� '--I- '--�- ;- 1-��-.�-�--�-�-. rt-�i-i T_ �� i T��--i I-1- i- i�� 1 i 1 i i I 4