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Z <br /> rn <br /> EXTERIOR WALL <br /> SLOPED TO DRAIN <br /> AWAY FROM STRUCTURE <br /> 404" <br /> PAVEMENT OR 24" ' /i%/ a —1,14;141 WALL DRAINAGE MATERIAL <br /> IMPERVIOUS SOIL 'i\1 — 11=f—III <br /> o \�\ <br /> 1E11 I= �.raft 2' MIN. <br /> RETAINED SOIL <br /> co \ I l-III—IIItog, <br /> CNI <br /> 111E111=:•�°. DAMP PROOFING <br /> TEMPORARY I I El I ,o`Q <br /> EXCAVATION SLOPE I I=11 I— _..o� VAPOR RETARDER <br /> MEM':`�,;x.S FLOOR SLAB <br /> =ii46 <br /> r . a a•{� -r��'r�'�����'�� r sir���41�'��' ;� <br /> ce <br /> P•���.�! i�: 40007•071,74.41,71:17•041,7•441.04... <br /> �s:��:iS�i:����:i�ti���i� �:i�� MIN. <br /> it <br /> 12" MIN. COVER OF >i;�//,. ‘ ,, <br /> DRAINAGE MATERIAL CAPILLARY BREAK <br /> (6" MIN. ON SIDES. OF PIPE) 4" DIAMETER <br /> PERFORATED <br /> DRAIN PIPE <br /> NOT TO SCALE <br /> CT <br /> 6 <br /> a <br /> Materials: <br /> J <br /> A.WALL DRAINAGE MATERIAL:May consist of washed 3/8"to No.8 pea gravel.Alternatively the wall drainage <br /> material may consist of"Gravel Backfill for Drains"per WSDOT Standard Specification 9-03.12(4),surrounded with a <br /> non-woven geotextile such as Mirafi 140N(or approved equivalent). <br /> B.RETAINED SOIL:Should consist of structural fill,either on-site soil or imported.The backfill should be compacted in <br /> loose lifts not exceeding 6 inches.Wall backfill supporting building floor slabs should consist of imported sand and gravel <br /> per WSDOT Standard Specification 9-03.14 compacted to at least 95 percent ASTM D1557.Backfill not supporting <br /> building floor slabs,sidewalks,or pavement should be compacted to 90 to 92 percent of the maximum dry density, per <br /> ASTM D1557.Backfill supporting sidewalks or pavement areas should be compacted to at least 95 percent in the upper <br /> 4 two feet.Only hand-operated equipment should be used for compaction within 5 feet of the walls and no heavy <br /> o equipment should be allowed within 5 feet of the wall. <br /> 0 <br /> 0 <br /> o C.CAPILLARY BREAK:Should consist of at least 6 inches of clean crushed gravel with a maximum size of 1-1/2 inches <br /> and negligible sand or fines. <br /> co <br /> D.PERFORATED DRAIN PIPE:Should consist of a 4-inch diameter perforated heavy-wall solid pipe(SDR-35 PVC)or <br /> rigid corrugated polyethylene pipe(ADS N-12)or equivalent.Drain pipes should be placed with 0.5 percent minimum <br /> slopes and discharge to the storm water collection system. <br /> 0 Wall Drainage and Backfill <br /> Proposed Liberty Hall <br /> Everett Community College <br /> i <br /> . GEOENGINEERS Figure 4 <br />