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QUARTERLY GROUNDWATER MONITORING AND SAMPLING REVIEW 4614 W TURNER RD. , LODI PAGE 3 Groundwater levels ranged from 21 . 62 to 23 . 88 feet below the surface, still low due to the drought . Laboratory analyses indicate no benzene present in any of the wells tested MW-3 and MW-6 each showed trace amounts of toluene, ethylbenzene, and xylene FIRST QUARTER 1993 - Sampled on January 29 , 1993 Groundwater levels and samples were obtained from 8 monitoring wells at the site . MW-1 has been converted to an extraction well MW-9 is inoperable Groundwater levels continue to remain low ( 20 . 87-22 . 68 below surface) , showing only slight impact from a wet winter . Laboratory analyses indicate a trace amount of benzene in MW-10 (0 . 8 ug/L) . No contaminants were detected in any of the other wells . SECOND QUARTER 1993 - Samples taken May 7 and May 14 , 1993 Groundwater levels and samples were obtained from 8 monitoring wells at the site. MW-1 has been converted to an extraction well . MW-9 is inoperable . Groundwater levels showed a significant rise since the last quarter. Levels ranged from 16 . 04 to 17 . 95 feet below the surface. This represented an average rise of 5 . 06 feet from last quarter . Laboratory analyses indicate TPHg was detected in MW-3 ( 61 .0 ug/L) . No other contaminants were detected in MW-3 , or in any of the other wells THIRD QUARTER 1993 - Samples taken on August 17 , 1993 Groundwater levels and samples were taken from 4 monitoring wells at the site. MW-1 has been converted to an extraction well . MW-2 , MW-4 , MW-5, and MW-7 have not shown any contaminant levels for a year or more, and were not tested during this round of sampling. MW-9 is inoperable. Groundwater level in the four wells tested ranged from 14 . 81 to 15 . 88 feet below the surface . This represents and average rise of 1 . 49 feet from last quarter.