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ATTACHMENT B:MAP OF WELLS/AREA OF REVIEW • Monitoring wells • Gas wells Each of these types of wells is discussed in the following. Well Inventory Approach The well inventory used multiple sources of information to develop an inventory as comprehensive as possible. Theses sources include the following: • California Department of Water Resources (DWR) (http://wdl.water.ca.gov/gw/) • Unites States Geological Survey (USGS) (http://water.usgs.gov/) • California DOGGR (http://www.conservation.ca.gov/dog/maps/Pages/goto welllocatigD.aspx) • 2006 City of Lodi Soil and Groundwater Investigation • San Joaquin County (http://www.sjmap.org/groundwater/) • 2008 Phase I Environmental Assessment for the NCPA LEC Project • 1994 Permit to NCPA for STIG Well#1 • Well Drilling Reports (within a 2-mile radius) The USGS and DWR databases served as the primary source of information for groundwater wells,while the DOGGR online database served as the primary source for oil and gas wells. The additional resources listed above provided supplemental information and verification of the data obtained from the primary sources. Figure B-3 shows the identified water wells (domestic,irrigation,municipal,and monitoring). Figure B-4 shows the known oil and gas wells. Tables B-1 and B-2 summarize relevant information for the wells shown on Figures B-3 and B-4,respectively. Municipal and Industrial Supply Wells Three municipal supply wells were identified during the well inventory. Two are identified as the supply wells for the WPCF,and the third is the supply well for the Flag City complex at the junction of Highway 12 and I-5. According to the drilling report, the two WPCF wells are screened at 104 and 176 feet below ground surface (bgs). These municipal supply wells currently also supply non-potable water to the STIG facility. The Flag City supply well is 170 feet deep. One industrial supply well was identified within the AOR. This well,located along Highway 12,provides water for a trucking facility. Domestic Supply Wells The rural residents within the study area obtain drinking water from individual private domestic wells. Approximately 27 domestic wells have been identified within the AOR from the various sources reviewed. The exact number of wells is uncertain because some well locations were unable to be estimated based on the incomplete or illegible descriptions SAC/371322/082550015(ATTACH MENT-B.DOC) B-3