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�f <br /> r Quarterly Report - Third Quarter 2000 <br /> `.' ELKHORN COUNTRY CLUB <br /> 1050 Elkhorn Drive, Stockton, California <br /> -= 1.0. INTRODUCTION <br /> At the request of Mr. Bob Young of Elkhorn Cxn <br /> Country Club, Advanced GeoEnvironental, Inc. <br /> (AGE)has prepared this quarterly report of field activities performed during the third quarter of 2000 <br /> at 1050 Elkhorn Drive, Stockton, California(the site). <br /> The scope of work included monitoring of a soil vapor extraction blower, collection soil vapor and <br /> soil samples for remediation confirmation and conducting quarterly monitoring of four ground water <br /> >> monitoring wells. <br /> The site and its surroundings are illustrated in Figure 1. Structures and ground water monitoring well <br /> locations on the site are depicted in Figure 2. Site history and findings from previous investigations <br /> 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 /> r- <br /> water monitoring results are included in tables of this report <br /> 2.0. PROCEDURES <br /> Monitoring and sampling were performed in accordance with guidelines established by the Central <br /> Valley Regional Water Quality Control Board.(CVRW CB) and by the San,Joaquin County Public <br /> Health Services - EnVironniental Health Division (PHS-EHD) for subsurface investigation of <br /> underground storage tank sites and in accordance with the PHS-EHD-approved Remedial Action <br /> Work Plan Addendum for corrective action prepared by AGE, dated 14 January 1998. <br /> =' 2.1. MONITORING OF SVE AND COLLECTION OF SOIL VAPOR SAMPLES <br /> In accordance with the AGE letter dated 21 August.2000, the internal combustion/dual-catalytic <br /> converted soil-vapor extraction unit which had operated at the site, was replaced with an active <br /> vacuum blower capable of extracting approximately 20 cubic feet per minute(cfrn). The blower was <br /> `r installed and began operation on 14 September 2000., <br /> The system has been monitored monthly for flow rate of extracted soil vapor, measured using a <br /> i Dwyer differential pressure flow meter and organic vapor concentrations in the extracted vapor <br /> ==� stream entering the blower (influent stream), using an organic vapor meter equipped with a photo- <br /> ionization detector (PID: Thermo Environmental 580A, 10.0eV, calibrated to isobutylene). <br /> Vapor sample was collected on 14 September 2000 and 20 October 2000 from the influent streams <br /> using a Tedlar bag. <br /> Advanced GeoGnvironmental,Inc. <br /> is <br /> r-i <br />