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1 Quik Stop Market No. 132 July 28, 1992 <br /> Project No. 3-49132-33 Page 3 <br /> ' Conclusions <br /> At a depth of approximately 8 to 14 feet, there appears to be a transition from a less <br /> ' dense, more porous soil to a more dense, less porous soil. This information compares <br /> favorably with the cross sections constructed for the Phase III Investigation conducted <br /> at this site (Exceltech, Inc. 1991) included here as Figures 3, 4, and 5. No direct or <br /> indirect evidence has been obtained to indicate the presence of a perched aquifer in the <br /> areas sampled in this survey. This information would indicate that the perched aquifer <br /> is linuted in extent and isolated from the lower aquifer. <br /> Recommendations <br /> RESNA recommends the installation of two groundwater monitoring wells in a <br /> downgradient direction from monitoring well MW-5 (which monitors the perched <br /> aquifer). As shown on Figure 6, one monitoring well would be located as close to <br /> ' being directly downgradient as practical. This well would be installed in the parking <br /> area on the north side of the Taco Bell building. The other monitoring well would be <br /> installed on the west side of the east driveway. The installation of monitoring wells in <br /> these locations would provide valuable stratigraphic information and allow <br /> downgradient monitoring of the aquifer located beneath the perched aquifer. Obtaining <br /> access for the installation of the wells located on the Taco Bell property will require the <br /> assistance of the SJCPHS. <br /> Reporting Requirements <br /> Quik Stop Markets, Inc. should forward a copy of this report to the following agencies <br /> in a timely manner: <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 445 North San Joaquin Street <br /> Stockton, California 95201 <br /> Attention: Mr. Steven K. Schneider, R.E.H.S. <br /> Environmental Health Specialist <br /> j <br /> California Regional Water Quality Control Board <br /> ' Central Valley Region <br /> 3443 Routier Road <br /> Sacramento, California 95827 <br />