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. Quarterly Monitor;lnab Report First and Second Quarter 200:1 . ' Franklyn Cole Property 7505 West Linne Road, Tracy, California ' I.O. INTRODUCTION AND SCOPE OF WORK At the request of Mr. Franklyn Cole, Advanced Geo Environmental, Inc. (AGE) has prepared this quarterly report for 7505 West Linne Road, Tracy, California(the site). This report summarizes the sampling and analysis of ground water samples from three existing ground water monitoring wells t and two of the three domestic water wells at the site. The location and vicinity of the site are illustrated on Figure 1. The location of on-site structures, borings, wells and the former UST and dispenser locations are depicted on Figure 2. 1 This report is prepared in accordance with the Central Valley Regional Water Quality Control Board (CVRWQCB) guidelines for the investigation of underground storage tank (UST) sites. ' Background information and a summary of prior investigations at the site are included in the AGE- prepared document titled Work Plan - .4pril 1999, dated 23 April 1999. Quarterly monitoring data ' from August 1999 to the present is summarized in Tables 1 and 2 in this report. '• 2.0. PROCEDURES On 14 February and 07 May 2001 ground water sampling events were conducted at the site. The ' sampling of the ground water monitoring wells on the site was conducted in accordance with the AGE-prepared work plan titled Work Plan - April 1999, dated 23 April 1999. The work plan was ' approved by the San Joaquin County Public Health Services- Environmental Health Division(PHS- EHD) by letter dated 29 April 1999. ' 2.1. MONITORING WELL PURGE PROCEDURES ' Depths to ground water were measured in each well from the tops of the well casings to the nearest 0.01-foot utilizing a Solinst water level meter. Ground water elevation in each.well at the site was calculated by subtracting the measured depths to ground water from the surveyed-casing elevations ' (Table 1). Ground water elevations were plotted and contoured on a scaled site map (Figure 3). After water levels were measured, approximately 5 to 6 gallons of ground water(a minimum of three ,T.._cas_ing7water_volumes_per-w_ell)_were_retnove4-frorn.wells.MW .1_through 1KW,-3._utilizing a new disposable bailer at each well. Temperature, pH and conductivity were measured for stabilization at regular purge-volume intervals from each well using a Hydac water analyzer. Field data and logs ' are in Appendix' A. Purged ground water was containerized in 557g4llon drums and stored at the site. Advanced GeoEnvironrnental,Inc.