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cLanren <br /> SmRECEIVEFM - <br /> NOV 9 VV <br /> ENVIRONMENTAL HEAL]"H <br /> ENVIRONMENTAL ENGINEERING CORPORATION PERMIT/SERVI <br /> November 4, 1992 <br /> Ms. Margaret l agorio <br /> San Joaquin Public Health Services <br /> 1601 East Hazelton Avenue <br /> Stockton, California 95201 <br /> Dear Ms. Lagorio: <br /> RESPONSE TO REQUEST FOR MONITORING WELL WATER DISPOSAL <br /> STATUS FOR THE FORD NEW HOLLAND DEALERSHIP IN STOCKTON, <br /> CALIFORNIA <br /> This letter is provided in response to your verbal request for information (telephone <br /> conversation with Dr.Jill P. Slater on October 21, 1992) regarding the disposal status <br /> of monitoring well water from the Ford .New Holland dealership located at <br /> 2150 West Charter Way in Stockton, California. Specifically, disposal information <br /> for well purge water generated from monitoring wells MW-1 through MW-4 in July <br /> and September 1990 and for well development and purge water from monitoring well <br /> MW-5 was requested. <br /> Groundwater sample analytical results for MW-1 through MW-4 (from the <br /> July 31, 1990 and September 12, 1990 sampling events) were below laboratory <br /> reporting limits. Since the samples showed no detectable chemicals,well purge water <br /> temporarily stored on-site in a 55-gallon drum was allowed to percolate into on-site <br /> surface materials. <br /> Development water (generated on September 17, 1991) and well purge water <br /> (generated on September 19, 1991 and on October 11, 1991) from MW-5 was <br /> temporarily stored on-site in a 55-gallon drum. Well purge water (generated on <br /> September 19, 1991) from MW-1 through MW-4 was temporarily stored on-site in <br /> a separate 55-gallon drum. The purge water from MW-1 through MW-4 contained <br /> no detectable concentrations of chemicals. The well development and purge water <br /> from MW-5 showed 1.0 and 1.2 parts per billion (ppb) of.benzene. Ethyl benzene <br /> 11101 White Rock Road,Rancho Cordova,CA 95670(916)638-3696 FAX(916)638-2842 <br /> amcycW Pepe, <br />