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TABLE f MORITA BROTHERS, 814 E. CHARTER WAY , STOCKTON, LA RESULTS OF WATER ANALYZES FROM QUARTERLY MONITORING Field testing & sampling performed by Del --Tech Geotechnical Analyzes performed by Sherwood Labs, Hilmar , CA Laboratory procedures used: BTEX - EPA 602; MTBE - EPA 8240 TPH-G - EPA 5030/8015M Detection limits: BTEX- 0.3 ug/L; TPH-G-- 50. 0 ug/L; MTBE-5. 0 ug/L MW-1 10/92 3/93 6193 10/93 2/94 5/94 7/94 12/94 3/95 7195 10/95 2/96 7/96 Benzene ND ND ND ND 0. 4 ND ND ND ND ND ND ND ND Toluene ND ND 0. 9 2. 3 4. 8 3. 9 1 . 9 2. 0 4. 0 8. 0 ND 5. 0 2. 0 E. Benzene ND ND ND 0. 6 0.5 0.6 ND 0. 4 0. 7 0. 4 ND 0. 8 ND Xylene ND NO 0. 4 1. 2 0. 3 0.7 ND 0. 7 0. 9 0.8 ND 0. 5 0. 7 TPHG 60 200 ND 81 150 110 ND 83 82. 0 104 NO 275 118 MTBE NT NT NT NT NT NT NT NT NT NT NT NT ND • MW-2 10/92 3/93 6/93 10/93 2/94 5/94 7/94 12/94 3/95 7/95 10/95 2/96 7/96 Benzene 7. 0 3. 0 ND 38 19 27 58. 0 49.0 63. 0 225 359 177 532 Toluene 1 . 6 1. 9 0. 7 17 5. 4 8. 2 6.5 5. 0 4. 0 7. 0 17. 0 3. 0 6. 0 E. Benzene ND 0. 3 ND 11 3. 9 4. 5 9. 3 6. 0 8. 0 20. 0 36. 0 12. 0 25. 0 Xylene ND 1 . 0 0. 4 19 3. 1 5. 7 11 . 0 6. 0 11 . 0 19. 0 33. 0 6. 0 31 . 0 TPHG 470 500 ND 531 225 230 370 305 262 170 1000 645 1520 MTBE NT NT NT NT NT NT NT NT NT NT NT NT ND MW-3 10/92 3/93 6/93 10/93 2/94 5/94 7/94 12/94 3/95 7/95 10/95 2196 7/96 Benzene 19. 0 17. 0 13. 0 15 8. 6 7. 0 ND 4. 0 0. 8 5. 0 1 . 0 3. 0 2. 0 Toluene ND 7. 4 7. 0 6. 2 5. 8 16 ND 6. 0 2. 0 14. 0 4. 0 7. 0 4. 0 E. Benzene NO 0. 7 0. 7 3. 0 2. 7 ND ND ND ND ND 0. 4 ND ND Xylene ND 1 . 3 1. 3 2. 8 3.3 3. 7 ND 2. 0 1 .0 2. 0 2. 0 3. 0 2. 0 TPHG 550 1200 110 390 700 700 ND 350 125 400 300 740 779 MTBE NT NT NT NT NT NT NT NT NT NT NT NT ND WM.J. HUNTER b ASSOC.R. SUMMARY OR RESULTS OF WATER ANALYSES 2220 COMA VISTA OR. TABLE I SACRAMENTO,CA 95825 SINCE MONITORING BEGAN