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MURRAY & ASSOCIATES <br /> ENVIRONMENTAL SERVICES <br /> March 17, 1991 <br /> Harlen Knoll - <br /> San Joaquin County Health Department F� <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> Stockton, CA 95201 rr <br /> Dear Mr. Knoll: <br /> Re: Quarterly Sampling Report, Groundwater Monitoring Wells _ Stan Morri Ford <br /> Dealership - Tracy, California <br /> Murray & Associates is forwarding for your review and consideration the following <br /> analytical results stemming from the Iast (Spring, 1991) round of water sampling at the <br /> Stan Morri Ford Dealership, - <br /> 104 West 11th Street, Tracy, California. The purgoable <br /> halocarbon contamination present appears to be decreasing. Shallow groundwater at the <br /> site is staying at a depth of approximately 12 feet below the asphalt-covered surface of the <br /> Ford Dealership. Regional groundwater flow direction is still generally to the i.;;rtheast. <br /> ` All apparatus was brought 10 the site clean and in serviceable condition. Following the <br /> purging and sampling of each subsequent well, all equipment was steam-cleaned and <br /> washed in a solution of liquinox organic cleaner, rinsed in deionized water and allowed to <br /> air dry. <br /> Groundwater sampling protocols call for the evacuation of a sufficient volume of water <br /> from the well to insure that the sample is collected from water that has been newly drawn <br /> into the well from the surrounding geologic formation. This effluent water is currently <br /> stored on-site in new DOT 17 E drums. Only effluent water removed from monitoring <br /> wells MW-1 and MW-3 is being contained on-site. Water purged from MW-2 was released <br /> " directly to the City's storm drain,. - <br /> 2252 Fort Point Drive, Gold River, CA 95670 <br /> (916)635.0839 • FAX(916)852.1411 <br /> _F <br />