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QUARTERLY GROUNDWATER MONITORING AND SAMPLING REVIEW • QUARTERLY GTS MONITORING AND SAMPLING REVIEW 4614 W TURNER RD , LODI PAGE 3 Summary Trace amounts of TPHg were aetected an MW 3 and trace amounts or Benzene and Toluene were aetectea in the influent to the GTS . MW 3 early an the monitoring program consistently showed low levels of contaminants , with a downward trend In the four quarterly samplings previous to this report , MW 3 has shown only trace amounts or more often non aetectible levels of contaminants The current results of trace levels of TPHg suggest that the plume as retreating The current results also suggest that the rising water table over the last years has not picked up contaminants in the soil Therefore, the retreat of the plume as not likely to reverse zrselT MW-1 ( currently the extraction well proV?aang the influent to the GTS ) is closest to the sacie cf tie former underground tank , and has uD to this time cons istent lsshown the !Zighest levels of contaminants This well has also snown a continu?na downward trend in contaminants especially since the installation of the GTS The current trace level of Benzene and Toluene , and no detection of other contaminants is a very good scan consistent with the results of the last quarter of 1994 , when no contaminants were detected We will need further auarterl_v testing to confirm that the low to non-detect level of contaminants is a long term condition Effluent from the GTS continues to snow no traces of contaminants The next quarterly sampling will occur an May 1994 . At that time , an abbreviated round of sampling will oe done to include MW 3 , MW 6 , MW 7 , GTS influent and ef; '_ uent I can be reached at ( 209 ) 339-1311 with an-y questions or comments you may have related to tnas pra -7ect Yours truly AST VINEYARDS J ephen Manilda Attachments cc California Regional Water Quality Control Board