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Quarterly Monitoring Report Second Quarter 2001 <br /> ELKHORN COUNTRY CLUB <br /> 1050 Elkhorn Drive, Stockton, California <br /> 1.0. INTRODUCTION <br /> At the request of Mr. Bob. Young of Elkhorn Country Club and to comply with closure criteria of <br /> <' the San. Joaquin County Public Health Services - Environmental Health Division (PHS-EHD), as <br /> verbally directed by Ms. Margaret Lagorio of the PHS-EHD, Advanced GeoEnvironniental, Inc. <br /> (AGE)has prepared this quarterly report of field activities performed during the second quarter of <br /> 2001 for post-remedial monitoring at 1050 Elkhom Drive, Stockton, California (the site). <br /> The scope of work included monitoring of a soil vapor extraction rebound test, collection of a soil <br /> vapor sample and conducting quarterly monitoring of nine ground water wells (six monitoring and <br /> three air-sparging wells): <br /> The site and its surroundings are illustrated in Figure d. Structures and ground water monitoring well <br /> locations on the site are depicted in Figure 2. Site history and findings from previous investigations <br /> 1 and monitoring events at the site are detailed in Corrective Action Plan -27 June 1996 (CAP) and <br /> in Quarterly Report--December 1996,dated 28 February 1997,prepared by AGE. Historical ground <br /> :..) water monitoring results are included in tables of this report <br /> CORRECTIVE ACTION-SVE AND IAS OPERATION <br /> In June 1996, a Corrective Action Plan (CAP)was submitted to the PHS-EHD. Recommendations <br /> { in the CAP included installation of a soil vapor extraction(SVE) system to remediate hydrocarbon- <br /> impacted soil and an in-situ air sparging (IAS) system to remediate hydrocarbon-impacted ground <br /> water. <br /> 1 <br /> • On 30 and 31 July 1998, six remediation wells were installed on the site, two soil vapor <br /> extraction wells and four in-situ air sparging wells, in preparation for corrective action. <br /> During July through September 1999, the remediation piping network and remediation <br /> ,equipment were installed and start-up procedures were conducted. <br /> • On 23 August 1999, initiation of an IAS ground water,remediation program,in combination <br /> with SVE remediation began. An.internal coriibustion-catalytic converted (IC) soil-vapor. <br /> extraction SVE unit, with a removal capacity of 100 cubic feet per minute (cfm), operated <br /> at the site until 14 September 2000. The IC unit was replaced with an active vacuum blower, <br /> =� discharging the hydrocarbon emissions without treatment at approximately 20 efin. The soil- <br /> vapor concentration of hydrocarbon had declined to concentrations that would not require <br /> 1 a destruction process for the recovered vapor stream according to the permit to.operate the <br /> SVE. <br /> Advanced GeoEnvironmentai,Inc. <br /> h <br />