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48" HEAVY DUTY NON -ROCKING <br />MANHOLE FRAME AND DOUBLE COVER <br />(TYP.) <br />1/2°MIN. (TYP.) <br />CONCRETE COLLAR <br />STD. 48 DIA. PRECAST <br />R.C. RISER SECTION ®; WATER -TIGHT WELD MORTAR <br />TRIM FLUSH WITH 1 I <br />i INSIDE FACE <br />j P. INLET IPM.P. OR C.M.P. <br />C.M.WATER LEVEL I I OUTLET <br />'• 1 <br />r <br />4 <br />INLET BAFFLE <br />18"MIN . ® g" <br />GREASE TRAP MIN. <br />MORTAR SEAL <br />® '• . "MIN. <br />CONCRETE BASE <br />FIRM, UNDISTURBED S01 <br />ELEVATION <br />no Scale I ' <br />GREASE AND OIL 'TRAP <br />BMP -47 <br />