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Mr. Robert Evan <br />March 12, 1992 <br />Page 2 <br />ldmkk <br />roject 939-03.15 <br />concentrations of 1 and 3 µg/I, respectively. No other VOCS have been <br />detected in ground -water samples from site wells. Both compounds were <br />detected at levels below the maximum contamination concentrations. The <br />certified analytical report for well MW -5 is attached. <br />The County proposes to continue monitoring well MW -5 for VOCs on a <br />quarterly basis using EPA Method 601. This addition to the current <br />quarterly monitoring program will provide ongoing tracking and verification <br />of VOCs with reduced detection limits. <br />If you have any questions, please call (916) 928-3300. <br />Very truly yours, <br />EMCON Associates <br />Phillip R. Graham <br />Environmental Scientist <br />f <br />Stephen T. Lofholm, R.G. <br />Project Manager <br />PRG/STL:cjw <br />Attachment: Certified Analytical Report for Well MW -5 <br />cc: Mr. Tom Horton, San Joaquin County <br />pj9\939\9390316a <br />