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GROUND ZERO ANALYSIS LOG OF BORING S91 / WELL MW1 PROJECT LOCATION PROJECT NO 327 DATE DRILLED 02/22/2000 LOGGED BY SEAN GARVEY REVIEWED BY GREG P STAHL RG No 5023 � RILLING COMPANY SPECTRUM EXPjQRATIQH _� DRILLER DAVE GQNZOLES METHOD HOLLOW STEM AUGER BORE HOLE DIAMETER 8 IN DEPTH DRILLED _ 81 FT DEPTH TO WATER INITIAL 50 FT STATIC 42 16 FT CASING TYPE PVC F480 DIAMETER __ 2 IN SCHEDULE 4a INTERVAL o FT TO 45 FT SCREEN TYPE PvC FAao DIAMETER - 2 IN SLOT SIZE 0 020 IN INTERVAL 45 TO 65 FT FILTER PACK TYPE _43 MONTEREY SAND INTERVAL 43 RL TO 65 FT SURFACE SEAL TYPE NEAT CEMENT GROUT BENTONITE COMMENTS INTERVAL a FT TO 43 FT WELL DEPTH FIDAM use PAGE I OF-2` DETAIL FT PPM BLOWCOUNT LOG DESCRIPTION o-"2. ASPHALT 2 2 –11/14 5' LEAN CLAY (CL) 10% FN, A PRLY GRDD SND 90% FNS, H 4 DRY STRNGTH N–SLW DLTNCY M–H TGHNSS M–H PLST BRN N–SL TO SL P0, HARD 8 5 15 CL 6 2l 8 10 200 10 – 18 25 12 11/145-16/195' SILT (ML) 10% FN A, PRLY GRDD SND 90% FNS L–M DRY STRNGTH, SLW–R DLTNCY M TGHNSS L–M PLST, BRN/GRN, 14 MOTTLED STRNG P0, DRY HARD >10 Oda 10 – 20 ML _ 16 25 16/195-21/245' WELL GRADED SAND WITH SILT (SW–SM) 90% FN–CRS A–SR. W GRDD SND, 10% FNS BRN STRNG P0, DRY, CALC DNS 18 HA–SBI-20 20 12 >10,000 20 SW–SM 25 22 21/24 5-26/29 5' SILT (ML) 5% M–CRS SA W GRDD SND 95% FNS L DRY STRNGTH R DLTNCY, L TGHNSS L PLST, BRN, STRNG PO DRY 24 V STIFF >10,000 a ML 26 12 28 HA–SRI1030 26/29 5-36/39 5' WELL GRADED SAND WITH SILT (SW–SM) 90% FN–M, A–SA, W 30—>10,000 20 GRDD SND 10% FNS, BRN STRNG PQ DRY, CALC, DNS 26 32 SW–SM 34- 12 >10,Ooo 23 36 29 36/395-41/445 WELL GRADED SAND (SW) 95% FN–M, A–SA W GRDD SND, 5% 38 FNS, BRN, STRNG P0, DRY–MST V DNS 40 >10.000 14 SW