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1 <br /> Table 1 (continued) <br /> HISTORICAL GROUNDWATER ANALYTICAL RESULTS AND MONITORING DATA <br /> CHEVRON SERVICE STATION#9-4275 <br /> 2905 WEST BENJAMIN HOLT DRIVE,STOCKTON CALIFORNIA <br /> Page-2 <br /> WELL 1 D / ETHYL— <br /> TOC ELEVATION SAMPLE BENZENE TOLUENE BENZENE XYLENES TPH—G DTW SPT WTE <br /> feet DATE b b b b b feet feet feet <br /> MW-4 03/22/89 ND ND ND ND ND 1629 000 —1348 <br /> 281 06/12/89 ND ND ND ND ND 16 97 000 —1416 <br /> 09/07/89 17 ND ND ND 170 18 35 000 --1554 <br /> 12/18/89 ND ND ND ND ND 1780 000 --1499 <br /> 03/20/90 29 ND ND 09 85 1740 000 —1459 <br /> 07/03/90 ND ND ND ND 93 1805 000 —1524 <br /> 10/19/90 ND 28 15 ND 73 1958 000 —1677 <br /> 01/17/91 ND ND ND ND 150* 1919 0 00 —1638 <br /> 03/19/91 ND ND ND ND 100 —— —— — <br /> 07/18/91 ND ND ND ND 81 1905 000 —1624 <br /> 10/31/91 ND ND ND ND 180* 1952 0 00 —1671 <br /> 01/16/92 ND ND 05 20 ND 1882 000 —1601 <br /> 03/11/92 — —— —— —— —— 1790 000 —1509 <br /> 03/17/92 2.9 97 3 97 150 1778 000 —1497 <br /> MW-5 03/22/89 35 23 110 760 4,000 1718 000 —1339 <br /> 379 06/12/89 24 2 2 53 900 17 80 000 —1401 <br /> 09/07/89 18 4 12 50 410 1911 000 —1532 <br /> 09107/89D 15 4 11 49 380 1911 0 00 -1532 <br /> 12/18/89 24 22 100 590 2,900 1863 000 -1484 <br /> 03/20/90 37 29 120 630 3,400 1819 000 -1440 <br /> 07/03/90 65 89 200 1 200 51500 1943 000 -1564 <br /> 10/19/90 55 82 190 1,100 51900 2004 coo -1625 <br /> 01/17/91 26 51 140 830 4,900 1998 000 --1619 <br /> 03/19/91 18 24 21 790 6,800 - - - <br /> 07/18/91 60 65 190 800 7,600 1972 000 -1593 <br /> 10/31/91 44 24 64 310 2,600 2020 000 -1641 <br /> 01/46/92 120 72 250 11000 5,400 1960 000 -1581 <br /> 01116/92D 110 63 230 960 4,700 1960 000 —1581 <br /> 03/11/92 —— —— —— — —— 1864 000 —1485 <br /> 03/17192 37 Is 52 170 1,100 1853 000 —1474 <br /> MW-6 03/11/92 — —— —— —— — 1699 000 —1556 <br /> 143 03/17/92 68 23 370 57 3,900 1695 000 —1552 <br /> MW-7 03/11/92 -- -- -- -- — 1724 000 —1410 <br /> 3 14 03117/92 ND ND ND NO ND 17 151.. 0 00 —1401 <br /> EXPLANATION <br /> TOC = Tap of casing <br /> TPH—G =Total petroleum hydrocarbons—as—gasoline <br /> DTW= Depth to water <br /> SPT= Separate phase thickness <br /> WTE =Water table elevation <br /> D = Duplicate <br /> -- = Not analyzed/not measured <br /> * = Does not match typical gasoline pattern <br /> GARTRDl Wt,l <br /> GROUNDI4'ATER <br /> TECHNOLOGY INC <br />