ARCHIVED REPORTS_2003 FEASABILITY STUDY REPORT AND SITE ASSESSMENT WORK PLAN

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! ! Table 1 Groundwater Elevation and Analytical Data Chevron Bulk Terminal 100-1621 22888 South Kasson Road Banta,California Well Depth Groundwater Groundwater SPH SPH Total SPH TPH as TPH as Ethyl- Total MtBE Well Date Elevation To Water Elevation Elevation Thickness Removed Removed Diesel Gasoline Benzene Toluene Benzene Xylenes MtBE EPA 82608 Number Gauged (feet MSL) (feet,TOC) (feet,MSL) Change(ft) feet (gallons) (gallons) (p/L) (N/L) (Vti) (V/L) (N/L) (P/L) (p/L) (p/L) MW-5A 11/04/97 5.65 13.36 -1.01 - - - 700` <50 <0.5 <0.5 <0.5 <0.5 <5.0 (cont.) 02/11/98 0.49 18.52 5.16 - - - 270' <50 <0.5 <0.5 <0.5 <0.5 <5.0 2.51 - - 623' 1,960 <0.5 <0.5 <0.5 <0.5 9.68 05/26/98 3.00 18.01 08/26/98 4.05 14.96 -1.51 - 3,960 96.3 <0.5 <0.5 <0.5 <0.5 11.3 11/19/98 5.02 13.99 -0.97 - - - 48,500 3,250 18.6 <5.0 5.94 17.9 <50 02/22/99 3.26 15.75 1.76 - - - 468' <50 <0.5 <0.5 <0.5 <0.5 11.3 06/15/99 5.00 14.01 -1.74 - 343 <100 <0.5 <0.5 <0.5 <0.5 <10.0 09/01/99 3.52 15.49 1.48 - - - 396 79 <0.5 <0.5 <0.5 <0.5 <5.0 11/30/99 5.54 13.47 -2.02 - - - 920' <100 <0.5 <0.5 <0.5 <0.5 <10.0 02/28/00 2.95 16.08 2.59 - _ _ 119 <100 <0.5 <0.5 <0.5 <1.0 <10.0 3.1 06/27/00 4.06 14.95 -1.11 0.00 0.00 0.00 5 <50 <0.5 <0.5 <0.5 <0.50 <50 <0.5 <0.5 <0.5 <0.5 7.6 08/21/00 3.79 1522 027 0.00 0.00 0.00 <5 1.3 11/30/00 5.62 13.39 -1.83 0.00 0.00 0.00 380 <50 <0.50 <0.50 <0.50 <0.50 9 4 03/06/01 5.59 13.42 0.03 0.00 0.00 0.00 720 <50 <0.50 <0.50 <0.50 <0.50 12 04/23/01 5.60 13.41 -0.01 0.00 0.00 0.00 680 <50 <0.50 <0.50 <0.50 <0.50 10 08/09/01 16.27 4.56 13.71 0.30 0.00 0.00 0.00 1,200 <50 <0.50 <0.50 <0.50 <0.50 17 11/20/01 9.69 8.58 -5.13 0.00 0.00 0.00 4,300 <50 <0.50 <0.50 <0.50 <0.50 2 /2 02 /02 7.28 10.99 2.41 0.00 0.00 0.00 1,400 <50 <0.50 <0.50 <0.50 <0.50 10 05/16/02 9.64 8.63 -2.36 0.00 0.00 0.00 3,000 b b b b b 0.5 08/27/02 9.25 9.02 0.39 0.00 0.00 0.00 3,400 <50 <0.5 <0.5 <0.5 <0.5 <11 12/04/02 10.34 7.93 -1.09 0.00 0.00 0.00 4200 - - -- -- -- _ 16 03/05/03 1024 8.03 0.10 0.00 0.00 0.00 1200 - - - - - - - - _ -- - NO 25 ND NO NO NO __ MW-6A 08/21/85 NO NO ND ND (MW-6) 10/13/88 - -- - - - -- - NO NO 04/14/89 21.19 7.95 13.24 - - - -- 10/06/89 6.35 14.84 1.60 10/10/89 - - - NO NO NO ND NO NO 01/17/90 9.41 11.78 - - - NO ND ND NO NO NO 04/16/90 8.55 12.64 0.86 - - ND ND ND ND NNO 07/18/90 -- - - - - - NO NO NO ND NDO NO 10/17/90 - - - NO NO NO NO ND NO 01/15/91 - - - - - NO 60 NO NO NO NO 04/04/91 9.41 11.78 - - 04/10/91 - NO NO NO NO NO NO - - 07/10/91 4.68 16.51 - - -_ - ND NO NO NO NO ND 06/01/92 6.14 15.05 -1.46 - - - ND NO NO NO NO NO - - NO NO ND ND NO ND 08/12/92 6.82 14.37 -0.68 - - - NO ND ND ND NO NO 11/02192 8.61 12.58 -1.79 - - - NO ND ND NO NO NO 02/26/93 5.06 16.13 3.55 - 06/02-03/93 6.87 14.32 -1.81 - - - ND NO ND ND NO NO 09/02-03/93 6.35 14.84 0.52 - - - ND NO NO ND ND NO 12/03-06/93 8.48 12.71 -2.13 - - - NO ND ND ND NO NO 03101-02194 8.56 12.63 -0.08 - NO ND ND ND ND NO 06/01/94 7.56 13.83 1.00 - - ND ND ND ND NO ND - ND NO ND NO ND NO 08/16-17/94 6.59 14.60 0.97 - - 11/21/94 8.70 12.49 -2.11 - - <50 <50 <0.5 <0.5 <0.5 <0.5 02/23/95 7.41 13.78 129 - - - <60 <60 <0.5 <0.5 <0.5 <0.5 05/30/95 5.90 15.29 1.51 - - 81 <50 <0.5 <0.5 <0.5 <0.5 7of33 Chevron\1001621\G Wtablel stotr2003