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Cheaper#76,890 N Main St,Manteca,California <br /> December 22,1995 <br /> Page 8 <br /> . Groundwater Monitoring <br /> Groundwater monitoring was completed by Kleinfelder for MW-1, MW-2 and MW- <br /> 3 in March and April, 1987, and May, 1988. Dames and Moore completed one round <br /> of sampling of the three wells in October, 1990. Parker completed monitoring of four <br /> wells in September, 1991, March, July, September and December, 1993, April and <br /> July, 1994, and January, April and July, 1995. Water level measurements were not <br /> available from existing files for the 1987 sampling events. The table below shows the <br /> average groundwater elevations for the site during sample events from 1988 to 1995 <br /> Groundwater Elevation Averages* <br /> Cheaper Store #76 <br /> 890 North Maim Street, Manteca, California <br /> 14 Groundwater Elevation Averages <br /> 12 <br /> 10 <br /> v <br /> . a 8 <br /> 6 <br /> IN4 <br /> IN2 <br /> 0 <br /> oa o �--� c*) MM m <br /> CYN o (7% d+ a+ tn �n <br /> ao . o. � a% � a% a� a. a� o, <br /> N N N N 00 N <br /> N da r_i di l� <br /> Average of 3 wells through 1990, 4 wells thereafter <br /> Groundwater ranged from about 20 to 29 feet BGS and followed a seasonal variation <br /> pattern Groundwater elevation measurements are tabulated in Attachment ***, <br /> Well Data Table. Quarterly groundwater monitoring was performed in accordance <br /> with Regional Water Quality Control Board (RWQCB) and San Joaquin County <br /> Health Services Department guidelines <br /> • <br /> Parker Environmental Services, 190 East 7th Street, Pittsburg, CA 94565-2317 <br /> Phone (510) 439-1024 Fax (510) 439-2566 <br />