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INDEPENDENT TRUCKING FACILITY, 1145 N. CHARTER NAY, STOCKTON CA RESULTS OF NATER ANALYSES Samples taken by Del-Tech Geotechnical Support Services Analyses performed by Sherwood Laboratory, Hillear, CA Laboratory method used Y detection limits; BTEX - EPA 6021 ug/L; 0.30 TPH-6 EPA 5030/8015M1 ug/L1 50.0 TEPH - EPA 3510/80I5MI ug/L; 50.0 MTBE - EPA 6021 ug/L; 5.0 CHLORONATED SOLVENTS - EPA 8010; ug/L; varies MN 1 MN-2 Date 7/95 12/95 4/96 7/96 11/96 3197 7/95 12/95 4/96 7/96 11/% 3/97 Benzene NO NO (3 ND(.3 0.4 0.3 NO NO NO ND(.3 ND(.3 ND<.3 Toluene 4.0 6.0 9.0 0.7 2.0 0.6 0.4 NO ND ND<.3 ND(.3 ND<.3 E. Benzene NO NO <3 ND(.3 0.3 0.5 NO NO NO ND<.3 ND(.3 ND<.3 Xylenes 0.4 NO <3 0.5 2.0 2.0 0.5 NO NO ND(.3 NO(,3 ND<.3 TPHg 78 NO 1933 ND<50 ND(50 ND(50 NO NO NO ND(50 ND(50 ND<50 TEPH NO NO NO ND(50 ND(50 ND<50 NO 57** NO ND<50 ND<50 ND(50 MTBE NT NT (50 ND(5.0 ND(5.0 NA NO NT NT ND(5.0 ND(5.0 NA EPA 8010 NT NT NT NO ALL NO ALL NT NT NT NO ALL NO ALL NT MN-3 MN-4 Date 7/95 12/95 4/96 7/96 11/96 3197 7/93 12/95 4/96 7/96 11/96 3/97 Benzene 0.6 NO 1.0 12.0 2.0 1.0 0.5 NO 0.9 0.4 12.0 1.0 Toluene NO NO NO ND(.3 4.0 ND<,3 0.5 1.0 7.0 ND(.3 39.0 ND/3 E. Benzene NO NO NO ND(.3 0.8 ND(.3 NO 17.0 7.0 2.0 27.0 4.0 Xylenes NO NO NO ND(.3 5.0 ND(.3 12.0 10.0 9.0 6.0 86.0 3.0 TPHg NO NO NO ND(50 ND(50 52.0 NO 417.0 90.0 57.0 567 356 TEPH NO NO NO ND(50 ND(50 3590** 6900# 2020# 4150# 1840* 930# 2420+ MTBE NT NT NO ND(5.0 ND(5.0 NA NO ND<5.0 NO NA EPA 8010 NT NT NT ND ALL NO ALL NT NT NT NT NO ALL 3400+ NT MN-5 MN-6 Date 7/95 12/95 4/7/96 11/96 3197) 7/96 111 3197 Benzene NT 2120 950 1370 2040 NT ND(.3 ND(.3 NT - location not accessible Toluene NT 580 560 566 471 NT ND(.3 ND<.3 NT E. Benzene AT 530 390 500 600 NT ND(.3 ND(.3 NT Xylenes NT 2120 1780 1600 1640 NT 0.7 ND(.3 NT TPHg NT 19100 22000 14800 16500 NT ND(50 ND(50 NT TEPH NT NO NO ND(50 ND(50 NT ND<50 ND(50 NT MTBE NO +* 123 NT ND(5.0 ND(5.0 NT EPA 8010 NT NT NO ALL NO ALL NT NO ALL NO ALL NT MN 7 MN-8 MN-9 Date 7/96 11/96 3/97 1196 11/96 3/97 9/96 11/96 3/97 Benzene ND(.3 ND(.3 ND(.3 6.0 8.0 5.0 10800 17600 13000 Toluene ND<.3 ND<.3 ND(.3 1.0 4.0 1.0 9840 12900 7680 E. Benzene ND(.3 ND(.3 ND(.3 1.0 1.0 ND(.3 3360 3590 3710 Xylenes ND(.3 ND(.3 ND(.3 1.0 3.0 0.6 14000 18200 12500 TPHg ND(50 ND(50 ND(50 56.0 71.0 187 111000 113000 93500 TEPH ND(50 ND(50 ND(50 ND(50 ND(50 ND(50 ND(50 ND<50 ND(50 MTBE ND(5.0 ND(5.0 NA ND(5.0 NO(5.0 NA ND(5.0 ND(5.0 NA EPA 8010 6.9*** NO ALL NT 22.0*#*56++ NT NO ALL 554 NT 110+++ * - Diesel rings organics ** - Motor oil range organics *i* - Trichloroethene **** - 1,1-Dichloroethane + - Methylene Chloride ++ - 1,1-Dichloroethane +++ - Vinyl Chloride . 1 - 1,2-Dichloroethane WM. J. HUNTER & ASSOC. SUMMARY OF WATER ANALYSES FROM ALL NINE 2220 LOMA VISTA DR. MONITORING WELLS SINCE START OF PROJECT TA SACRAMENTO. CA 95625 BLE A