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Sediment Trap <br />SLKACE AREA <br />DE•7ERMrD AT TOP } ri <br />YN... <br />Required Dimensions <br />or WEIR ----� , rr1inv otunwa <br />Q2 <br />0.16S cf5 <br />' �Ni <br />"I'a. T <br />r <br />I rT1 <br />Vs <br />0.0W96 f/S <br />_ <br />` WI <br />V 11.5 FT . <br />_ _ -- `w <br />FIATF10Tfi11 1 <br />J <br />SA <br />344 SF <br />3/4 IN TO 1.5 IN-� <br />N01T. TRAP MAY Bf FORMED BY 05544r0 CRAY-n <br />Length <br />33 FT <br />BIRM OR BY PARTIu OR COMPLETE OEDTEXTILE FABRIC <br />Width <br />11 FT <br />EXCAVATION. MIRAn 140N OR EOUVALENI <br />DISCHARGE TO STABIUZED <br />coN1{YAHcr. DuTLrT. OR <br />2-INTO 4-1N ROCK <br />LEVLL SF'i�ACfR <br />Min Dimensions <br />b-FT MIN <br />Min Width <br />6 <br />\ \ \ \ 1F+k*C01TM0LOWVLLWAT <br />Min Length <br />61 <br />/ <br />-TO IA <br />Bottom Area <br />4 <br />COMPACT BACRFILL <br />2NINT w1R" <br />Total SA <br />40 SF <br />GEOTEXTILE TABRIC \�j\'�//%/%�li/},// \�\ � <br />MA 1-FT DEPTH 3 IN TO is -IN <br />MRAFI 14ON OR EWIVALEHT <br />W0.5NEC CRAWL <br />Alternate Tank <br />Figure 1. Sediment Trap Requirements <br />Holding Tank Volume <br />77 CF <br />577 Gallons I Note: Baker Tank or equivalent maybe used. <br />® The construction SWPPP satisfies this requirement. <br />5.3 MINIMUM REQUIREMENT #3: SOURCE CONTROL OF POLLUTION <br />See the attached Worksheet for Industrial Activities from Volume IV, Chapter 2 of the Everett Manual in the Standalone <br />Maintenance and Source Control Plan. <br />® The Maintenance and Source Control Plan satisfies this requirement. <br />5.4 MINIMUM REQUIREMENT #4: PRESERVATION OF NATURAL DISCHARGE SYSTEMS AND OUTFALLS <br />The project discharges to the approved location: a new catch basin in 10th Street. <br />® The discharge location to the ground satisfies this requirement. <br />5.5 MINIMUM REQUIREMENT #5: ONSITE STORMWATER TREATMENT <br />BMPs was based on Volume II Chanter 12 of the Everett Manual. <br />10/15/2019 - Revision: The building was pulled back for an open space requirement, which would be the <br />only place that on -site stormwater could be infiltrated. The soils do not support infiltration and since this <br />area is a land -use code requirement, it cannot be used as a low impact development BMP (dispersion or <br />infiltration). <br />. t .. I. I i t t +, t e t t t <br />5.6 MINIMUM REQUIREMENT #6: RUNOFF TREATMENT <br />This project does not require the design and construction of stormwater treatment facilities because our total of effective, <br />new and/or replaced pollution -generating impervious surface (PGIS) is less than 5,000 square feet. <br />Z Infeasible — less than 5,000 square feet of PGIS. <br />7 . <br />3/07/2018 <br />Rev. 10115119 <br />