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FINISHED GRADE,SEE <br /> PLANS IC A <br /> SPECIFICATIONS <br /> T <br /> _ z <br /> PVC PIPE AS REQUIRED <br /> e � e <br /> FLOW <br /> TEE <br /> SEE TABLE 3 FOR RISER <br /> (OVERFLOW)HEIGHT <br /> ABOVE DETENTION PIPE <br /> FLOW m e INVERT ELEVATION 0%SLOPE <br /> A SAND COLLAR <br /> SECURE WITH 8 GA OR GROUT <br /> 18"MIN e ALUMINUM DETENTION PIPE <br /> SUMP BELOW e STRAP.BOLT TO CB LENGTH PER TABLE 3 <br /> OUTLET PIPE WALL WITH STEEL <br /> ANCHOR BOLTS <br /> ORIFICE SIZE PER TABLE 3, TYPE 1L CB FOR 18"OR <br /> SEE NOTE 5 SMALLER DETENTION <br /> PIPES OTHERWISE USE <br /> TYPE 2 CB <br /> ELEVATION <br /> NOTES <br /> FINSHED 1. DETENTION STRUCTURE SHALL BE FABRICATED <br /> GRADE FROM ONE OF THE FOLLOWING: <br /> A. CORRUGATED ALUMINUM PIPE, 12 GAUGE <br /> MINIMUM. <br /> N <br /> z COMPACT IN 8"LIFTS B. HIGH DENSITY POLYETHYLENE PIPE. <br /> - TO 90%MAX DENSITY C. CORRUGATED POLYETHYLENE STORM <br /> SEWER PIPE. <br /> N-� ° DETENTION PIPE DIA D. STEEL RIB REINFORCED POLYETHYLENE PIPE. <br /> (D ° ° PER PLANS <br /> z ° ° 2. ANNUAL INSPECTIONS AND CLEANING <br /> Q N REQUIRED BY OWNER TO ENSURE PROPER <br /> OPERATION OF DETENTION SYSTEM. <br /> oLu 3. W=MAXIMUM WIDTH OF TRENCH FOR <br /> = Q ° PIPE/VAULT PER MANUFACTURER <br /> Ln D C° ° ° ° ° io INSTALLATION INSTRUCTIONS. <br /> U <br /> 4. COMPACT IN 8" LIFTS TO 90%MAX DENSITY. <br /> o ° <br /> 5. ORIFICE SHALL BE INSTALLED ON REMOVABLE <br /> 0 CAP TO ALLOW FOR MAINTENANCE. <br /> W _ <br /> (SEE NOTE#3) 6. PROVIDE FLOATABLE MATERIAL SEPARATOR <br /> WITH GAS TRAP DOWNSTREAM OF FLOW <br /> CONTROL STRUCTURE, PRIOR TO DISCHARGE <br /> SECTION A-A TO THE SEWER. <br /> 0 <br /> 3200 Cedar Street UNDERGROUND <br /> E V E R E T T Everett everettw DETENTION SYSTEM <br /> 425.257.8800 everettwa.gov PUBLIC WORKS FOR SMALL PROJECTS <br /> s � <br />