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F�1 GROUND ZERO ANALYSIS LOG OF BORING SB1 PROJECT GABBARD LOCATION 640 NORTH EL DORADO STREET STOCKTON CA PROJECT NO 256 DATE DRILLED 01/19/99 LOGGED BY SEAN GARVEY REVIEWED BY JOHN P. LANE RG No. 6759 DRILLING COMPANY FISCH ENVIRONMENTAL DRILLER RICK BERTOUNO METHOD DIRECT PUSH BORE HOLE DIAMETER 2 IN DEPTH DRILLED 31 FT DEPTH TO WATER INITIAL 23 FT STATIC 16 FT CASING TYPE NA DIAMETER �._ IN SCHEDULE INTERVAL FT TOFT SCREEN TYPE NA DIAMETER IN SLOT SIZE IN INTERVAL - FT TO FT FILTER PACK TYPE NA INTERVAL FT TO __._._.__.�T SURFACE SEAL TYPE NEAT CEMENT INTERVAL FT TO FT COMMENTS PAGE I OFA_ WELL DEPTH PID SAMPLE ID U 5 C DESCRIPTION DETAIL (Fr) PPM BLOWCOUNT LOG 0-3 CONCRETE 2 3 -6/9 ELASTIC SILT (MH) 5% FN-M SA PRLY GRDD SND 95% FNS SLW DLTNCY M-H TGHNSS L PLST DRK BRN NPO MST MH 4 O b 6/9-11/14 SANDY CLAY (CL) 507 FN SA, PRLY GRDD SND 50% FNS, SLW DLTNCY M TGHNSS M-H PLST TAN NPO DRY-MST 8 10 0 CL - - - f - 12 11/14-16/19 POORLY GRADED SAND WITH CLAY (SP-SC) 90% FN A-SA, PRLY GRDD SND 10 % FNS SLW DLTNCY L-M PLST TAN SL-M PO DRY-MST 14 20 SP-SC 16 GASB1-16 16/19-21/24 SILT WITH SAND (ML) 15% FN A-SA PRLY GRDD SND 85% FNS SLW DLTNCY L-M TGHNSS L-Md PLST GRY MPO 18 MST 20 960 ML GASB1--21 21/24-26/29 ELASTIC SILT (MH) 5'7 FN A PRLY GRDD SND 9517. FNS 22 — SLW DLTNCY M TGHNSS M PLST GRY SL PO MST 24 5 - HYDROPUNCH GROUNDWATER SAMPLE COLLECTED AT 26 MH 26 0 GASB1-26 26/29-3075 WELL GRADED SAND (SW) 95-100% M-CRS SA-SR W GRDD GASB1-260W SND 0-57. FNS R DLTNCY L TGHNSS N PLST BRN-GRY 28 NPO WET, WEAK CEMENTATION 2 GASB1-30 SW 30 2 CL 3075-31 LEAN CLAY (CL) 5% FN A PRLY GRDD SND 957 FNS N-SLW DLTNCY, M-H TGHNSS, M-H PLST, TAN NPO, WET 32 D GEo! 34 36 Nk, 6795 Q 38 e` F OF C p, 40