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�, <br /> � � <br /> ( +o <br /> —EXTERIOR WALL <br /> SLOPED TO DRAIN � ; <br /> � AWAY FROM STRUCTURE � - <br /> —_ ,. <br /> � " WALL DRAINAGE MATERIAL <br /> PAVEMENT OR 24'� = <br /> � IMPERVIOUS SOIL 1 <br /> ( REfAINED SOIL , 2� MIN. <br /> DAMP PROOFING <br /> ( TEMPORARY VAPOR REfARDER <br /> EXCAVATION SLOPE <br /> � F�OOR SLAB � <br /> � 6" MIN. <br /> � <br /> � 12" MIN. COVER OF CAPILLARY BREAK <br /> DRAINAGE MATERIAL 4" DIAMETER <br /> � (6" MIN. ON SIDES OF PIPE) <br /> PERFORATED <br /> � ORAIN PIPE <br /> � NOT TO SCALE <br /> ( <br /> ( <br /> ( Materials: <br /> ( A.WALL DRAINAGE MATERIAL: May consist of washed 3/8"to No.8 pea gravel.Altemalively lhe wall drainage <br /> malerial may consist of"Gravel Backfill for Drains"per WSDOT Standard Specification 9-03.12(4),surtounded with a <br /> non•woven geotextile such as Mirafi 140N(or approved equivalent). <br /> B. RETAINED SOIL:Should consist of structuret fill,either un•site soil or imported.The backfill should be compaded in <br /> � loose lifts not ezceeding 6 inches.Wall backfill suppoAing building iloor slabs should consist oi imported sand and gravel <br /> per WSDOT Standard Specificalion 9-03.14 compacled to at least 95 percent ASTM D7557.Bac�ll nol supporting <br /> ( building floor slabs,sidewalks,or pavement should be compacted ta 90 to 92 percent of the mazimum dry density,per <br /> ASTM D1557. Backfll suppoAing sidewalks or pavement areas should be compacted to at least 95 percent in lhe upper <br /> ( two feet. Only hand-operated equipment should be used for compaction within 5 feet of Ihe walls and no heary <br /> equipmenl should be allowed wilhin 5 feet a(lhe wall. <br /> ( C.CAPILLARY BREAK:Should consist of al least 6 inches of clean crushed gravel with a maximum size of 1-t12 inches <br /> and negligible sand or fines. <br /> D.PERFORATED DRAIN PIPE:Should consist o(a 4•inch diameter peAoraled heavywall solid pipe(SDR-35 PVC)or <br /> rigid corrugated polyethyle�e pipe(ADS N-12)or equivalent.Orain pipes should be placed with 0.5 percent minimum <br /> slopes and discharge to lhe stortn water collection system. <br /> Wall Drainage and Backfill <br /> � Proposed Student Fitness And Health Center <br /> Everett Community College <br /> ( <br /> � �7EOENGINEERS� Figure 3 <br /> ( 7�{ <br />