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t <br /> [., INTERNATIONAL `r <br /> TECHNOLOGY ;- - ? <br /> CORPORATION Pr I: 23 <br /> August 2, 1995 <br /> i - <br /> Mr. Harlin Knoll <br /> San Joaquin County <br /> Public Health Services <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> Re: Quarterly Monitoring Report - Third Quarter 1995 <br /> San Joaquin Catholic Cemetery <br /> k Harding Way and Cemetery Lane, Stockton, California. <br /> Dear Mr. Knoll: <br /> On July 13, 1995 groundwater monitoring and sampling was performed at the above-referenced <br /> site. The site is located approximately one mile north of downtown Stockton, California (Figure <br /> Monitoring Well (MW)-4 was not available for sampling because it had been covered by soils <br /> generated during cemetery operations. On July 25, 1995, MW-4 was located using metal <br /> detection equipment and depth-to-groundwater measurements were then re-taken in all five <br /> monitoring wells. <br /> The depth-to-groundwater at the site ranged from 55.81 to 56.95 feet below ground surface. 1 <br /> 4 The elevation of the groundwater surface beneath the site ranged from a high of 38.73 feet <br /> below mean sea level (msl) in MW-4 to a low of 38.86 feet below msl in MW-5. Groundwater r <br /> levels have risen an average of 4.15 feet since the last monitoring event on January 27, 1995. 1 <br /> t Groundwater monitoring data.are summarized in Table 1. <br /> The groundwater flow direction and gradient have shifted significantly,since the last monitoring <br /> j. event in January 1995. The groundwater surface map (Figure 2) shows the high groundwater <br /> elevation point at MW-4 and elevation contours radiating from the high. The maximum <br /> groundwater gradient was calculated at 0.0017 ft/ft in a northwesterly direction. <br /> Each available monitoring well was purged of at least three well volumes using a decontaminated l <br /> submersible pump. MW-4 was not sampled because it had been buried by soils from cemetery 1 <br /> operations. Sample Information Forms documenting well monitoring, purging and sampling data <br /> R are included as Attachment 1. <br /> Regional Office <br /> 10461 Old Placerville Road, Suite 110• Sacramento, Califomia.95827-2522. 916-361-7673• FAX, 916-361-3047 ' <br /> J <br /> IT Corporation is a wholly owned subsidiary of International Technology Corporation <br /> f <br />