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' Quik Stop Markets,Inc. Page G-3
<br /> Project No. F7132.32
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<br /> In an effort to further delineate the off-site extent of contamination, RESNA and Quik Stop
<br /> Markets, with the approval of SJCPHS, elected to conduct a soil gas and shallow groundwater
<br /> survey along the eastern side of the Taco Bell site and that portion of West Hammer Lane which
<br /> fronts the Taco Bell site. This survey was conducted on April 29, 1992 with a specially equipped
<br /> van operated by Tracer Research Corporation (Tracer) of Tucson,Arizona,under the direction of a
<br /> RESNA geologist. The results of this survey indicated that the upper aquifer and the
<br /> ' contamination detected in it did not extend into the areas investigated in this survey. This
<br /> suggested that the upper aquifer is limited in extent and isolated from the lower aquifer(RESNA
<br /> Industries Inc. July 1992).
<br /> In view of the information obtained in the Tracer survey, RESNA has recommended the
<br /> installation of two groundwater monitoring wells on the Taco Bell property. Obtaining access for
<br /> ' the installation of the wells located on a Taco Bell property will require the assistance of the
<br /> SJCPHS. Scheduled quarterly groundwater sampling and analysis will continue.
<br /> ' In our June 1992 quarterly report (RESNA, October 1992) RESNA recommended that on the basis
<br /> of an established history of nondetectable TPHG and BTEX the sampling frequency for wells
<br /> MW-3 and MW-4 be reduced from quarterly to semi-annually. In a letter dated November 17,
<br /> ' 1992 to Mr. Jack Griffith of Quik Stop Markets from the SJCPHS approved the semi-annual
<br /> sampling and analysis of these two wells. During a phone conversation on December 3, 1992 with
<br /> Mr. Steven Schneider of the SJCPHS, Mr. Schneider reduced the fecal coliform sampling and
<br /> analysis of well MW-2 from semi-annually to annually.
<br /> References
<br /> Exceltech, September 1990, Preliminary Soil and Groundwater Investigation at Quik Stop Market
<br /> No. 132, 3555 West Hammer Lane, Stockton, California: unpublished technical report for
<br /> Quilt Stop Markets, Inc.,Fremont, California.
<br /> Exceltech, November 1990, Termination of Excavation, Quik Stop 132, 3555 West Hammer
<br /> Lane, Stockton, California: unpublished technical report for Quik Stop Markets, Inc.,
<br /> Fremont, California.
<br /> Exceltech/RESNA,July 1991, Phase III Soil and Groundwater Investigation at Quik Stop Market
<br /> No. 132, 3555 West Hammer Lane, Stockton, California: unpublished technical report for
<br /> ' Quik Stop Markets, Inc.,Fremont, California.
<br /> RESNA Industries Inc., July 1992, Soil Gas and Shallow Groundwater Survey for Quik Stop
<br /> ' Market No. 132, 3555 West Hammer Lane, Stockton, California: unpublished technical
<br /> report for Quik Stop Markets, Inc.,Fremont, California.
<br /> RESNA Industries Inc., October 1992, June 1992 Quarterly Groundwater Sampling and Analysis
<br /> for Quik Stop No. 132, 3555 West Hammer Lane, Stockton, California: unpublished
<br />,r technical report for Quik Stop Markets, Inc.,Fremont, California.
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