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CAMBRIA <br /> detected are limited to the shallow soil in the immediate vicinity of the southeastern dispenser. <br /> The vertical and lateral extent of detections in soil have been defined by non-detect results in all <br /> other soil samples collected at the site. Cumulative soil sampling results are summarized in <br /> Table 1. <br /> Hydrocarbon Distribution in Groundwater: During the first quarter 2005, no TPHg, BTEX, or <br /> 1Y, <br /> o � MTBE were detected in any of the wells sampled at the site. No TPHg or BTEX has been <br /> d"detected in <br /> site wells since at least August 2004. No MTBE has been detected in site wells since <br /> �0. at least Ono-b2r-00<and MTBE concentrations have been less than 5 ppb in site wells since at <br /> lea October 2001.• Historical groundwater data and the first quarter 2005 groundwater contour <br /> --maps are included in Appendix A. <br /> CHECKLIST OF REQUIRED DATA FOR NO FURTHER ACTION REQUESTS <br /> The site appears to meet the RWQCB-CVR criteria for a low-risk groundwater designation. The <br /> following are responses to the checklist items contained in Appendix A of the Tri-Regional <br /> Board Staff Recommendations for Preliminary Investigation and Evaluation of Underground <br /> Tank Sites, dated April 16, 2004. A copy of the checklist is included in Appendix C. <br /> 1. Distance to production wells for municipal, domestic, agriculture, industry and other uses <br /> within 2000 feet of the site; <br /> Distances to identified production wells within a 1/2-mile radius of the site are showed on <br /> Figure 1 and summarized in Table 2. There are two domestic wells, two industrial wells, one <br /> irrigation well, and two municipal wells within 2,000 feet of the site. In addition, there is one <br /> destroyed domestic well,and two abandoned municipal wells within 2,000 feet of the site. � <br /> 2. Site maps, to scale, of area impacted showing locations of former and existing tank <br /> systems, excavation contours and sample locations, boring and monitoring well elevation <br /> contours,gradients, and nearby surface waters, buildings, streets, and subsurface utilities; <br /> A site vicinity map and a site plan are included as Figures 1 and 2, respectively. Soil sample <br /> locations and the UST area are shown on Figure 2. The first quarter 2005 groundwater contour <br /> maps are presented in Appendix A. '_2 <br /> 1 , <br /> 0324 6 <br />