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VALLEY SHOWCASE, 921 W. FREMONT STREET, STOCKTON, CA LABORATORY ANALYSIS OF (TATER SAMPLES FROM MONITORING HELLS Samples taken in March, 1994 analyzed by FGL Environmental, Stockton Samples taken in'June, 1994 & later analyzed by Sherwood Laboratory, Hilmar, CA Laboratory method used and detection limits: BTEX - EPA 8020/602; ug/L; 0.3 THP-0 EPA 5030/8015M; ug/L; 50.0 Purgeable Halocarbons - EPA 601; uglL; limits vary; see lab sheets attached to report. Only compounds shown below were above detection limits. MBTE - EPA 8260; ug/L; 5.0 MW-1 Date 3194 6194 9194 12/94 3195 7/95 12195 3196 6196 11/96 Benzene ND ND ND ND NO ND ND ND ND ND Toluene ND ND ND ND NO ND 0.7* ND ND ND E. Benzene ND ND ND ND NO ND ND ND NO ND Xylene NO ND ND ND NO ND 0.8 NO ND NQ TPH-6 NO ND NO ND ND ND NO HD ND NO ND NA MTBE 1,2-dichloroethane NO Trichloroethene 2.4 Tetrachloroethene 31.0 MW-2 .� Date 3194 6/94 9194 12194 3/95 7/95 12195 3196 6/96 11/96 Benzene 400 250 50 119 345 119 209 344 NT NT Toluene 400 120 30 lb 64 27 550 117 NT NT E. Benzene 300 80 60 25 622 53 116 129 NT NT Xylene 2000 660 220 113 316 119 419 656 NT NT TPH-B 96.8 50 1800 1420 2506 1183 2490 3740 NT NT MTBE ND NT NT 1,2-dichloroethane 0.07 Trichloroethene 510 Tetrachloroethene 22.0 MW-3 MW-4 Date 3194 6194 9194 12194 3195 7195 12195 3196 6196 11/% 5/96 6196 11/96 Benzene ND ND ND NT ND ND ND ND ND ND ND NO ND Toluene ND ND ND NT ND NO ND ND ND NO ND ND ND E. Benzene ND ND ND NT NO ND NO ND ND ND ND ND ND Xylene ND ND NO NT ND ND ND ND ND 0.0 ND ND ND TPH-B NO ND ND N7 ND ND NO ND ND ND ND ND NO ND ND NA ND ND NA MBTE 1,2-dichloroethane NT Trichloroethene NT Tetrachloroethene NT NO - Not detected at reporting limit NT - Analysis not run NA - test not applicable s - Possibly contaminated due to bailer blank 'hit' 'WM..l.HUNTER&'ASSOC. LABORATORY RESULTS OF WATER SAMPLES 2220 LOMA VISTA OR. FROM MONITORING WELLS TABLE I SACRAMENTO.CA 95825