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TEE <br />FLOW <br />18" MIN <br />SUMP BELOW <br />OUTLET PIPE <br />N <br />.y <br />FINISHED GRADE, SEE <br />PLANS & <br />SPECIFICATIONS <br />PVC PIPE AS REQUIRED <br />SEE TABLE 3 FOR RISER <br />— (OVERFLOW) HEIGHT <br />— ABOVE DETENTION PIPE <br />— INVERT ELEVATION <br />SECURE WITH 8 GA <br />ALUMINUM <br />STRAP. BOLT TO CB <br />WALL WITH STEEL <br />ANCHOR BOLTS <br />ORIFICE SIZE PER TABLE 3, <br />SEE NOTE S <br />FINSHED <br />GRADE <br />A <br />- z <br />0%SLOPE <br />A SAND COLLAR <br />OR GROUT <br />DETENTION PIPE <br />LENGTH PER TABLE 3 <br />ELEVATION <br />COMPACT IN 8" LIFTS <br />TO 90% MAX DENSITY <br />DETENTION PIPE DIA <br />— ^ PER PLANS <br />I '( <br />W <br />SEE NOTE #3 <br />SECTION A -A <br />E V E R E T T EMMO,WA98201 <br />Everett, WA 98291 <br />425.351.8800 evmettwa.9av <br />PUBLIC WORKS <br />FLOW <br />TYPE 1L CB FOR 18" OR <br />SMALLER DETENTION <br />PIPES OTHERWISE USE <br />TYPE 2 CB <br />NOTES <br />1. DETENTION STRUCTURE SHALL BE FABRICATED <br />FROM ONE OF THE FOLLOWING: <br />A. CORRUGATED ALUMINUM PIPE, 12 GAUGE <br />MINIMUM, <br />B. HIGH DENSITY POLYETHYLENE PIPE. <br />C. CORRUGATED POLYETHYLENE STORM <br />SEWER PIPE. <br />D. STEEL RIB REINFORCED POLYETHYLENE PIPE. <br />2. ANNUAL INSPECTIONS AND CLEANING <br />REQUIRED BY OWNER TO ENSURE PROPER <br />OPERATION OF DETENTION SYSTEM. <br />3. W=MAXIMUM WIDTH OF TRENCH FOR <br />PIPE/VAULT PER MANUFACTURER <br />INSTALLATION INSTRUCTIONS. <br />4. COMPACT IN 8" LIFTS TO 90% MAX DENSITY. <br />S. ORIFICE SHALL BE INSTALLED ON REMOVABLE <br />CAP TO ALLOW FOR MAINTENANCE. <br />6. PROVIDE FLOATABLE MATERIAL SEPARATOR <br />WITH GAS TRAP DOWNSTREAM OF FLOW <br />CONTROL STRUCTURE, PRIOR TO DISCHARGE <br />TO THE SEWER. <br />UNDERGROUND <br />DETENTION SYSTEM <br />FOR SMALL PROJECTS <br />