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Closure Documentation—7500)Pest Eleventh Street, Tracy, C4. **moo Page 3 2.0 CHECKLIST OF REQUIRED DATA FOR NO FURTHER ACTION REQUEST AT UNDERGROUND TANK SITES The SJCEHD letter dated April 19, 2012 requested that they be provided with any of the information included in the Table 1- Checklist of Required Data for No Further Action Request at Underground Tank Sites of Appendix A in Reports, Tri-regional Board Staff Recommendations for Preliminary Investigation and Evaluation of Underground Tank Sites (California Environmental Protection Agency Regional Water Quality Control Board Central Valley Region April 2004) not previously submitted for the 7500 West I I th Street Site. In the case of checklist items already submitted to the regulatory agencies the letter requested that the reports containing the requisite information be identified. Each item cited in the checklist is addressed below. 2.1 Distance to Production Wells for Municipal, Domestic, Agriculture, Industry and Other Uses within 2000 ft. of Site This information was provided in the following Reports: The San Joaquin Company Inc. (2001), Site Characterization Report: Former Fueling Station at 7500 West Eleventh Street, Tracy, California. January 2001. The San Joaquin Company Inc. (2002), Report on Extended Site Characterization - Former Fueling Station at 7500 West Eleventh Street, Tracy, California. October 2002. Due to high nitrate concentration in groundwater in this agricultural area, the majority of the potable water supply wells screened in formations lying above the Corcoran Aquitard on, or in the area of the 7500 West 11 th Street site have either been closed or converted to use as irrigation wells in compliance with SJCEHD directives. Both the new on-site and off-site wells, all of which are screened below the Corcoran Aquitard were installed by DEC and their locations have been have been recorded on the figures included in DEC's groundwater-quality monitoring reports. The currently extant wells are located as shown on Figure 2 which was included in: Dietz Engineering and Construction, Inc. (2011), Groundwater-quality Monitoring Report-July 2011, Former Fueling Station, 7500 West Eleventh Street, Tracy, California. October 2011. 2.2 Site Maps to Scale, of Area Impacted Showing Locations of Any Former and Existing Tank Systems, Excavation Contours and Sampling Locations, Boring and Monitoring Well Elevation Contours, Gradients, and Nearby Surface Waters, Buildings Streets, and Subsurface Utilities. Site maps and other relevant drawings have been included in all reports related to the DEC