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r-= Quarterly Report August 1997 <br /> ELKHORN COUNTRY CLUB <br /> 1050 Elkhorn Drive, Stockton, California <br /> ' 1.0. INTRODUCTION <br /> � J <br /> _ In accordance with a request from Mr. Bob Young of.Elkhorn Country Club, Advanced <br /> GeoEnvironmental, Inc., (AGE) has prepared this Quarterly Report of field activities performed <br /> during the third quarter of 1997 at 1050 Elkhorn Drive, Stockton, California (the site). The scope <br /> of work included monitoring,purging and sampling of each of the six monitoring wells on the site. <br /> _. The site and its surroundings are illustrated in Figure 1 -Location Map. Structures and ground water <br /> monitoring well locations on the site are depicted in Figure 2 -Site Plan. <br /> The monitoring and sampling were performed in accordance with guidelines established by the San <br /> Joaquin County Public Health Department-Environmental Health Division(PHS-EHD)and Central <br /> Valley Regional Water Quality Control Board (CVRWQCB) for investigation of underground <br /> storage tank sites. Site history and findings from previous investigations and monitoring events at <br /> the site are detailed in the Corrective_ Action Plan (CAP) 27 June 1996. and previous Quarterly <br /> Reports prepared by AGE. <br /> 2.0. PROCEDURES <br /> _ 2.1. MONITORING WELL PURGING <br /> On 04 August 1997, the water level in monitoring wells MW-1 though MW-6 was measured <br /> relative to the top of the well casings using a Solinst water level meter. After water levels were <br /> measured, approximately three gallons of water(a minimum of three well volumes) were removed <br /> from air-sparging well VW-2 and approximately 6 gallons of water (a minimum of three well <br /> volumes) were removed from ground water monitoring wells MW-2, MW-3 and MW-5 using a <br /> -� submersible PVC pump. Temperature, pH and conductivity (stabilization data) were measured at . <br /> one-gallon intervals during purging using an ICM model 52200 water analyzer. Stabilization data <br /> and field logs are included in Appendix A. Purged water was stored on-site in 55-gallon drums. <br /> 2.2. SAMPLE COLLECTION AND ANALYSIS <br /> Water samples were collected from the purged wells using new disposable plastic bailers. The <br /> collected samples were transferred into 40-ml.EPA-approved VON vials. The samples were labeled, <br /> logged on a chain-of-custody form, placed in a chilled container and transported to McCampbell <br /> Analytical, Inc. (MAI) in Pacheco, California. <br /> Advanced CcoEnvironmental,Inc. <br /> i <br />