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.l GROUND ZERO ANALYSIS LOG OF BORING SB4 PROJECT GABBA D LOCATION 640 NORTH EL_DORAM STOCKTON CA PROJECT NO 256 DATE DRILLED 1D 2fi/99 LOGGED BY SEAN GARVEY REVIEWED BY JOHN UNE RG 6795 DRILLING COMPANY FISC}I_ ENVIRONMENTAL, DRILLER DAVE FISCH METHOD DIRECT PUH BORE HOLE DIAMETER 2 IN DEPTH DRILLED 31 ET DEPTH TO WATER INITIAL ___ 26 _F7 STATIC 16 EI CASING TYPE NA DIAMETER IN SCHEDULE INTERVAL Er TO Fz SCREEN TYPE NA DIAMETER IN SLOT SIZE IN INTERVAL .- FT TO FT FILTER PACK TYPE NA INTERVAL - FT TO FT SURFACE SEAL TYPE NEAT CEMENT GROUT OVER BENTONITE INTERVAL - 0 FT TO 31 FT COMMENTS PAGE_I OF_L WELL DEPTH FED SAMPLE ID U 5 C DESCRIPTION DETAIL FT PPM BLOWCOUNT LOG 2 4 BEGAN LOGGING AT 9 FEET 6 8 10 9-11/14' SANDY LEAN CLAY (CL) 30% FN. A-SA, PRLY GRDD SND, 70% 0 FNS M DRY STRNGTH, SLW DLTNCY, M TGHNSS M-H PLST, TAN- CL LT BRN. NPO, DRY-MST -12- - 2 / �// 11/14-16/19' LEAN CLAY WITH SAND (CL) 20% FN, A. PRLY GRDD SND, BOX / FNS M-H DRY STRNGTH. N-SLW DLTNCY M-H TGHNSS, M-H 14 PLST. BRN. NPO, MST 0 CL 16 / / / 18 /� 16/19-21/24' SANDY LEAN CLAY (CL) 3OX FN-M, A-SA, W GRDD SND, 70% / FNS, H DRY STRNGTH, N-SLW DLTNCY. M-H TGHNSS, M-H PLST, GAB-584-20' / BRN, NPO, MST 20 0 CL 22- 21/24-26/29 SILT WITH SAND (ML) 20% FN-M, A-SA, W GRDD SND, BOX FNS, L DRY STRNGTH, SLW DLTNCY, L-M TGHNSS, L-M PLST. 24 BRN. NPO, WET 0 ML 26 _ GAB-SB4-GW 26' 28 GAB-SB4-31' 26/29-30 5' WELL GRADED SAND (SW) 100% FN-CRS. A-SA, W GROG SND. 0 SW TRC FNS, BRN/WHT, NPO. WET 3a CL LEAN CLAY (CL) <5% FN. A SNO, >95% FNS. H DRY STRNGTH. H DRY STRNGTH, N-SLW DLTNCY, H TGHNSS H PLST, BRN WET -32- D GFO 34 JOHN P .� 36 LANE N N 6795 3a F aF C 40