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f3FIRMIT'�,E- <br /> GROUND ZERO ANALYSIS, INC. 96 Au FIRMIT -r; tuE <br /> 2291 W. March Lane, Suite 127D <br /> Stockton, California 95207 <br /> Telephone: (209) 952-3481 <br /> Facsimile: (209) 952-9892 <br /> i <br /> August 12, 1996 <br /> Mr. Ron Rowe <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 388 <br /> Stockton, CA 95201-0388 <br /> Subject: Groundwater Monitoring and Sampling at the Former Valley Volkswagen <br /> 647 East Miner Ave., Stockton, California (County Site Code 1187) <br /> Dear Mr. Rowe: <br /> • Ground Zero Analysis, Inc. (Ground Zero) is submitting this groundwater monitoring and <br /> sampling report for the above referenced site. The location of the site is shown ori Figure 1. <br /> Activities included monitoring the water level in well MW1, purging and sampling groundwater <br /> from the well, and analyzing samples for total petroleum hydrocarbons as gasoline (TPHg), <br /> benzene, toluene, ethylbenzene, xylenes (BTEX), and methyl tert-butyl ether (MTBE). <br /> On July 26, 1996, the depth to water measured in well MW 1 was 40.03 feet below ground <br /> surface (bgs). Since the last monitoring on May 24, 1995, the groundwater surface has risen <br /> 5.8 feet and is now above the top of the well screen. Depth to water data is shown below. <br /> Monitoring logs are included in Attachment A. Regional groundwater flow in the vicinity of <br /> the site is expected to be generally northeasterly away from the Stockton deep water channel and <br /> toward a large pumping depression on the northeast side of Stockton. <br /> Well Date Depth to Water (in.feet) <br /> MW 1 05/24/95 45.83 <br /> 07/26/96 40.03 <br />