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22 April 2009 AGE-NC-09-1683 t Page 7 of 19 of site's domestic water well is estimated to be greater than 100 feet bsg; well depths for the surrounding area were reported to be between 50 feet and 155 feet bsg. 4.2. GROUND WATER CONTAMINATION IN THE AREA OF THE SITE i The immediately adjacent and outlying land use for the parcel is agricultural in nature, with the urban City of Lodi located approximately 0.70 miles east of the site(just east of Lower Sacramento Road. A search of the California Regional Water Resources Control Board's Geotracker online records revealed six leaking underground storage tank(LUST)sites within a one-mile radius of the site.Five of the six LUST sites were listed as closed;the remaining open LUST site,USA Petroleum Service Station located at 2448 Kettleman Lane,is located approximately 0.72 miles east of the site. This open LUST site appears to be down- to equi-gradient from the subject site and according to documents available on Geotracker, the site appears to be in the closure phase (a Case Closure Summary Report was prepared for the site by Azure Environmental AE in December 2007 . � j ) Additionally,o ally, according to the most recent ground water monitoring data collected by AE in 2007, the impacted ground water appears to be limited to the area of the site. Based on status,and distance and direction from the subject site,AGE found no indication the above referenced active LUST site is of environmental concern to the site. 4.3. ON-SITE EXISTING WELL DESCRIPTION The current domestic water supply well is located at the southeast corner of the existing storm water J retention pond,approximately 125 feet south-southeast from the northwest corner of the site parcel (Figure 2).The domestic well is approximately 105 feet northwest of the existing septic system and approximately 185 feet from the proposed septic system. The existing domestic well appears to installed August 1989 to an unspecified depth with unspecified grout seal under SJCEHD permit(Appendix D).The permit documents the installation of a 6-inch diameter PVC well casing in a 12-inch diameter borehole. SJCEHD made comments on the permit as follows: "No permits. Destroy old well at same time". 4.4. GROUND WATER SAMPLE COLLECTION AND ANALYSIS On 31 March 2009,a ground water sample was collected from the well head of the on-site domestic well,before the carbon filtration system. Water was allowed to run for approximately 10 minutes before the sample was collected into laboratory-supplied containers without sample preservative. Following sample collection, the water sample was appropriately labeled with sample date,time, Advanced GeoEnvironmental,Inc.