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TABLE 4 <br /> (Continued) <br /> RESULTS OF ANALYSES OF GROUNDWATER SAMPLES <br /> FROM MONITORING WELLS AT 152 and 153 EAST 11th STREET, TRACY <br /> Well Sampling TPH TVH Benzene Toluene Ethyl- Total <br /> No Date (as Gas ) benzene Xylenes <br /> ppb Ppb ppb ppb ppb ppb <br /> ULT 5 04/14/87 12,000 3,200 200 200 100 300 <br /> 07/23/87 - 1,102 43 6 83 70 <br /> 07/03/91 1,000 - 8 9 18 15 52 <br /> 09/30/91 2,000 - 7 8 6 8 6 4 17 <br /> 12/31/91 600 - 2 2 2 6 3 4 4 9 <br /> 03/28/92 920 - 7 4 ND 2 9 3 2 <br /> 07/08/93 180 - 4 5 ND 1 8 2 8 <br /> ULT 6 04/14/87 6,000 39,100 1,400 1,100 800 3,200 <br /> 07/23/87 - 131 3 1 8 10 <br /> 07/03/91 540 - 28 3 8 2 1 15 <br /> 09/30/91 1,900 - 30 1 9 2 6 25 <br /> 12/31/91 690 - 9 9 ND 1 3 12 <br /> 03/28/92 830 - 28 0 7 1 5 12 <br /> 07/08/93 500 - 34 1 3 0 6 6 5 <br /> ULT 7 04/14/87 8,000 400 6 20 8 5 <br /> 07/23/87 - 570 8 13 5 51 <br /> 07/03/91 700 - ND 4 1 3 4 9 9 <br /> 09/30/91 440 - 1 5 2 3 0 7 3 2 <br /> 12/31/91 190 - 2 6 1 5 ND 2 6 <br /> 03/28/92 760 - 1 4 3 3 1 9 6 8 <br /> 07/08/93 200 - 2 1 0 6 ND 1 6 <br /> ULT 8 04/14/87 2,0000 ND ND ND ND ND <br /> 07/23/87 - ND ND ND ND ND <br /> 07/03/91 Pluged Pluged Pluged Pluged Pluged Pluged <br /> 09/30/91 Piuged Pluged Pluged Pluged Pluged Pluged <br /> 12/31/91 Pluged Pluged Pluged Pluged Pluged Pluged <br /> 03/28/92 Pluged Pluged Pluged Pluged Pluged Pluged <br /> 07/08/93 ND - ND ND ND ND <br /> ULT 9 07/23/87 - 31,619 3,954 10,526 1,627 8,358 <br /> 07/03/91 13000 - 610 1,400 310 13,000 <br /> 09/30/91 7500 - 600 570 140 7,500 <br /> 12/31/91 7200 - 520 570 120 7,200 <br /> 03/28/92 17000 - 860 1,000 850 17,000 <br /> 07/08/93 1900 - 240 190 34 240 <br /> ND = Not detectect above the Method Detection Limit <br /> = Not analyzed for the subject analyte <br />