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r , r • <br />Flov oontsol structur• (rostrictor r�hypase etructur�l: <br />The overflow st�ndpipe for control. structure �2 should be <br />modified to prevent oil, which teuds to accumulate in these <br />structures, from escaping with overflows. A bafflr_, made of <br />�a larger diameter pipe welded to the overflow standpipe, can <br />be added to the structure. The space between the baffle and <br />the overflow standpipe needs to be large enough to not cause <br />restriction of flows. The baffle should be stiffened by <br />welding a"rib" from the standpipe to the baffle, and should <br />extend a minimun of 2 inches above and 4 inches below the <br />overflow elevation. <br />oil/vator aeparator: <br />�G� 0�' City standards call for the separator to be located upstream <br />'�C�" of the swale. In this case, the best location for the <br />oil/water separator appears to be in the pipe batween <br />cuntrol structure #1 and the swale. <br />A detail of the vault shou].d be included on the plans <br />clearly showing the inlet zind outlet elevations of the <br />V" separator, the elevation of: the bottom of the separator, and <br />the position and height of interior baffle,. <br />v The separator should be equipped with a sampling tee at its <br />outlet. <br />The oil/water separator maintenance notes from section <br />�/ 4.11.1 of the City of Everett Design and Constriiction <br />Stan3ards and 5pecifications need to be it�cluded on the <br />drainage plans. <br />Miscellanaous: <br />The City has recently identified a general probl.em with <br />restaurant dumpsters. This area needs to be covered ana <br />isolated hydrologically through the use of berms. Drainage <br />from the area needs to be routed to the sanitary sewer <br />through an oil/water separator or grease trap. it may be <br />feasible to route drainage through the exterior grease trap <br />already shown on the plans. <br />v Additional comments are written directly on the plans. <br />�f��iS i FTlY+ i S S}� �� 7� � i 55 � P_ �.{' -�-��lk G� r CV ( 11 �i�� l�(M <br />��liS n«� a C�(+ �-i� lyc- �7�no��eC� '-i[ 5�t'S�ri l��Ci �'�u�C � d"�n_f.(' <br />c! ��C ��l n I-t �Jrol�p•-i d � 1^.�LLC�S �'o �.0 S�. ��•'�'� � 1'�" C C� ; n tivf ��srr.� J-f� <br />�, �-.,, � n�, ,�. �, �. <br />