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i <br /> . QUARTERLY REPORT <br /> _ r"s <br /> May 1996 <br /> Elkhorn Country Club <br /> 1050 Elkhorn Drive <br /> Stockton, California <br /> 1.0. INTRODUCTION <br /> In accordance with a request from Mr. Bob Young of Elkhorn Country Club, Advanced <br /> GeoEnvironmental, Inc. (AGE) has prepared this Quarterly Report-for field activities performed <br /> during the second quarter of 1996 at 1050 Elkhorn Drive, Stockton, California (the site). The scope <br /> of work included'monitoring,purging and sampling of each monitoring well at the.site. The location <br /> of the site is illustrated in Figure 1 -Location Map. The layout of the site is depicted in Figure 2 - <br /> =- Site Plan. <br /> �:._..i <br /> The monitoring and sampling were performed in accordance with the guidelines established by the <br /> = = Tri-Regional Board and San Joaquin County Public Health Department - Environmental Health <br /> Division(PHS-EHD) for investigation of underground storage tank sites. Site history and findings <br /> from previous investigations and monitoring events at the site are detailed in the Corrective Action <br /> Plan (CAP) and prior Quarterly Reports prepared by AGE. <br /> 2.0. PROCEDURES <br /> 2.1. MONITORING WELL PURGING <br /> On 15 May 1996, the water level in each well (MW-1 through MW-6) was measured relative to the <br /> top of its well casing using a Solinst water level meter(Table 1). After water levels were measured, <br /> approximately 8 gallons of water(a minimum of three well volumes)were removed from each well <br /> `-' using a PVC bailer. Temperature,pH and conductivity were measured at two-gallon intervals using <br /> an ICM model 52200 water analyzer. Stabilization data and field logs are included in Appendix A. <br /> Purged water was stored on-site in 55-gallon drums. <br /> i.j <br /> 2.2. SAMPLE COLLECTION AND ANALYSIS <br /> 1- a <br /> Water samples were collected from each well using a new disposable plastic bailer by transferring <br /> the collected water into 40-m1 EPA vials. The samples were logged on a chain-of-custody form, <br /> 1 placed in a chilled container and transported to McCampbell Analytical Inc. (MAI) in Pacheco, <br /> California. Each sample was analyzed for total petroleum hydrocarbons quantified as gasoline <br /> (TPH-g),volatile aromatics(benzene,toluene,ethyl benzene and xylenes: BTE&X)and methyl-tert- <br /> butyl ether(MTBE) in accordance with EPA methods 503018015m and 602. <br /> i f <br /> � i <br /> Ii <br />