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MAY 14 1993 <br /> TABLE 1 ENVIRONMENTAL HEALTH <br /> RESULTS OF ANALYSES OF GROUNDWATER SAMPLES PERMIUSERVICES <br /> FROM MONITORING WELLS AT 152 and 153 EAST 11th STREET TRACY CALIFORNIA <br /> Well Sampling TPH TVH Benzene Toluene Ethyl- Total <br /> No Date (as Gas ) benzene Xylenes <br /> ppb Ppb ppb Ppb ppb Ppb <br /> NAV 1 3118/88 - 3 300 0 970 2700 ND 1200 <br /> 1/20/93 ND - ND ND ND 17 <br /> NAV 2 3118188 - ND 40 ND ND - <br /> 1/20193 ND ND ND ND ND ND <br /> NAV 3 3118188 - 23 000 520 1 300 2100 11 000 <br /> 1/20/93 1 300 - 37 20 71 160 <br /> NAV 4 3118188 - 40 000 900 6,600 1,900 15 000 <br /> 1/20/93 25 000 - 60 1,400 420 7,300 <br /> ULT 1 411187 - 3 700 13 80 - ND <br /> 7/23187 671 122 40 70 24 <br /> 7/3191 1600 - 35 ND 07 23 <br /> 9/30/91 3500 15 ND 08 40 <br /> 12/31/91 3200 _ 13 11 09 37 <br /> 3128192 4700 - 11 08 07 50 <br /> ULT 2 411/87 - 30 000 1 700 1 800 - 72 <br /> 7/23187 - 1418 317 8 98 138 <br /> 712191 4 700 - 98 37 48 100 <br /> 9130/91 12 000 - 540 44 130 140 <br /> 12131/91 28 000 - 190 86 140 300 <br /> 3128192 4 400 - 80 56 78 150 <br /> ULT 3 411187 - ND ND ND - ND <br /> 7/23/87 - 160 120 70 ND ND <br /> 712191 ND - ND ND ND 09 <br /> 9130/91 ND - ND ND ND ND <br /> 12/31/91 ND - ND ND ND ND <br /> 3128/92 ND - ND ND ND ND <br /> ULT 4 4/14/87 4 000 1 700 200 200 600 400 <br /> 7123187 - 252 117 14 15 19 <br /> 713/91 880 - 120 18 81 25 <br /> 9130/91 580 - 65 06 42 83 <br /> 12/31/91 370 - 22 ND 07 08 <br /> 3128/92 310 - 16 08 06 12 <br /> Continued on next page <br />