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1T ; <br /> DEL- TECH Geotechnical Support Services <br /> Harlan Knoll/ °"J 32 A II January 24, 1996 <br /> San Joaquin Public Health Services / Environmental Health Division <br /> 445 N San Joaquin Street / P O Box 388 <br /> Stockton, California 95201-0388 <br /> RE: MONITORING, SAMPLING AND ANALYSIS (3) WELLS <br /> LOCATION: Stan Morri Ford , 104 West Eleventh, Tracy, California. <br /> Mr Knoll, <br /> Enclosed is the summary report for the last monitoring event at the site referenced above <br /> Included in this report is a summary table of the sample analysis for this monitoring event at each <br /> of the three monitonng wells At the time of the monitoring event the previous numerical <br /> locations for the monitoring wells was not known For consistency, I have adjusted the reports <br /> and the enclosed gradient map to correspond with the previous mapping locations However the <br /> analytical sheets are not consistent with the map locations MW-1 and MW-2 analytical results <br /> are to be reversed Reference the site gradient map versus chain-of-custody map for clarification <br /> According to the gradient map, generated by Geological Technics and by the data provided by <br /> Del-Tech's field monitoring report, the subsurface flow appears to be in a northerly direction <br /> This trend also appears to be consistent with the measured gradient of other sae's in the immediate <br /> area <br /> Based upon the laboratory analysis reported during this event and contingent on the next monitoring <br /> event We would like to encourage your departments careful review and consideration for site <br /> closure based on the relatively very low level of 1,1,1, TCE detected in monitoring well 91 Previous <br /> monitoring events five years ago indicated similar very low levels <br /> I will notify you within 48 hours of the next field monitoring event <br /> Please call my office if you have any questions <br /> Sincerely, <br /> r <br /> Donald E Light <br /> Engineering Contractor#657366 /Haz Waste Endorsed <br /> 10624 Olive Avenue, Oakdale, CA 95361 (209) 847-8757 Fax (209) 847-7744 <br />