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a <br /> NESTED SPARGE POINT CONSTRUCTION DETAIL <br /> A Total Depth of Boring 80 ft <br /> B Diameter of Boring 6 in <br /> E M -C Drilling Method hollow stem auger <br /> C Top of Box Elevation ft <br /> N Referenced to Mean Sea Level <br /> Ex Referenced to Project-Datum <br /> F2 D Casing Length 80 ft <br /> Material schedule 80 PVC <br /> J2 D2 Casing Length 30 ft <br /> Material schedule 80 PVC: <br /> D2 E Casing Diameter 075 in <br /> F <br /> F Depth to Sparge Point 775 ft <br /> F2 Depth to Sparge Point 275 ft <br /> K = G 2 G Sparge Point Length 30 in <br /> G2 Sparge Point Length 30 in <br /> D — <br /> A J <br /> H Surface Seal from 0 to 1 5 ft <br /> — Seal Material concrete <br /> I Backfill from 15 to 25 ft <br /> Seal Material neat cement <br /> J Seal from 31 to 77 ft <br /> G = K2 Seal Material hydrated bentonite <br /> J2 Seal from 25 to 27 ft <br /> Seal Material hydrated bentonite <br /> K Gravel Pack from 27 to 31 ft <br /> Pack Material Lonestar#2116 Sand <br /> L K2 Gravel Pack from 77 to 80 ft <br /> Pack Material Lonestar#2116 Sand <br /> $ L Bottom Seal NA tt <br /> Seal Material NA <br /> M Traffic rated,water resistant well box <br /> locking expandable well plug with lock <br /> Note Depths measured from initial ground surface <br /> Proposed Nested Sparge Point Construction Details FIGURE <br /> Gettler - Ryan, Inc. Tosco Service Station No 11192 <br /> 6747 sierra Ct Suits J {925)551 7555 1403 Country Club Boulevard <br /> Dublin ca 94566 Stockton California <br /> JOB NUMBER REVIEWED BY DATE REVISED DATE REVISED DATE <br /> 140245 08 Mar 02 <br />