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' <br /> 1 October 11, 1993 <br /> Job No 93036 <br /> 1 <br />' Conoco, Inc <br /> Room PO - 3038 <br /> P O. Box 4784 <br />' Houston, TX 77210-4784 <br /> ATTENTION Ms Linda Thompson <br />' Project Coordinator - Remediation Technology <br /> SUBJECT. Quarterly Groundwater Monitoring Report <br />' July - September, 1993 <br /> Former Econo Gas Station <br /> 4325 East Washington Street <br /> 6Stockton, California <br />' Dear Ms. Thompson <br /> 1.0 INTRODUCTION <br />' This report presents the results of the quarterly groundwater sampling which was conducted at Conoco <br /> Inc 's (Conoco) former Econo Gas Station, located at 4325 East Washington Street, Stockton, California <br />' (see the Location Map, Figure 1) on August 19, 1993 The purpose of this sampling program is to <br /> monitor and evaluate the extent of hydrocarbon contamination in the groundwater at the site Sampling <br /> observations and analytical results are reported herein from October 1991 through the current quarter <br /> Sunriver Engineering and Construction assumed responsibility for the monitoring of this site in June <br /> 1993 <br /> 2.0 GROUNDWATER SAMPLING SUMMARY <br /> 2.1 Summary of Groundwater Elevation Data <br /> A summary of data regarding ground water levels through August 19, 1993 is presented in Table A <br /> IIn general, groundwater levels at the subject site have risen approximately 0 40 foot since the last <br /> quarterly sampling event The groundwater gradient at the site is generally directed toward the south <br /> at a magnitude of approximately 0 0007 foot per foot (see the Groundwater Gradient Map, Figure 2) <br /> CONOCO\93036V�[JA.H2O2 REY <br /> • <br /> Engineering and COnSt�'l.1GtI0t�, Inc, <br />