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f � <br /> w <br /> P 2 3 f988 <br /> RELEAF VALVE I:NVI N'V NTAL HFAL <br /> PE it/SERVICES <br /> VAPOR TRAP <br /> TAN K <br /> VARIABLE SPEED EXCAVATI <br /> BLOWER <br /> & MOT :I-- <br /> OR <br /> RELEAF VALVE <br /> Y-STRAINER 4" PERFORATED <br /> "'�l <br /> EXISTING SCHEDUAL 40 <br /> BUILDING --- P.V.C. PIPE <br /> PIPE RISER <br /> with inlet valve <br /> at surface <br /> TOP VIEW <br /> VENT NEAR ROOF LINE <br /> VERTICAL PIPE <br /> XISTING BLOWER and MOTOR <br /> BUILDING GROUND LEVEL <br /> 4" SOLID <br /> CHEDULE, 40 P.V.C. RISERS <br /> fs <br /> TANK EXCAVATION <br /> 4" PERFORATED <br /> SCHEDULE 40 P.V.C. PIPE t( <br /> SECTION <br /> NOTE : <br /> PLACE 4" VENT LINE: ON GEOTEXTILE FABRIC <br /> LINING EXCAVATION WITH A MINIMUM OF 6" OF <br /> PEA GRAVEL ABOVE AND BELOW PIPE. <br /> VENT LINES WITHIN THE TANK EXCAVATION SHALL BE <br /> PLACED BETWEEN THE TANKS AND THE EDGE OF <br /> THE EXCAVATION. <br /> Dames & Moore <br /> PLATE <br />