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Mr. Mike Oliphant—CEMC Supplemental Well Search Report November 20,2012 US Can—Welty Road Page 3 of 3 According to the County, there are no indications that the dwelling associated with 35401 Welty Road was ever part of a separate assessor's parcel. Aerial photographs from 1963, 1982, and 1993 appear to show one or two dwellings adjacent to Welty Road near the southern corner of the former US Can property boundary. The structure(s) does not appear on the 1998 aerial photograph and there are currently no structures other than the manufacturing facility at the Site. San Joaquin County indicated there were permits on file for the demolition of buildings on the former US Can parcel in 1995, but the permits did not include a specific address. Presumably, the dwelling(s) associated with the 35401 address has since been demolished but no evidence of a reported destroyed well was found during the DWR search. The Drillers Report states that the well was located approximately 60 feet into the property. A water- supply well located approximately where the Drillers Report indicates was sampled in 1995. The groundwater sample was non-detect for the constituents of concern.' The well's presumed location is identified in the Site Vicinity and Well Location Map as Location 3 (Figure 1 and Table 1). CONCLUSIONS AND RECOMMENDATIONS Through additional research, SAIC was able to confirm the location of one of the water- supply wells (ID#25650) as lying on the CPS property. A second well (ID# 125288) could not be located due to insufficient and conflicting information. The remaining well (ID#052134) was likely associated with a former dwelling adjacent to the US Can property, and has been previously sampled, with no constituents of concern detected. No additional research is recommended. If you have any questions regarding this work,please contact Will Slowik at (559) 638- 7655 or Michael Hurd at (510) 466-7161. Sincerely, SAIC Energy Environment & Infrastructure, LLC MICH EL HURD0,�JIA LD ZL\S_�� No. 0068 William Slowik Michael Hurd, CHG 0068 CERTIFIED Project Manager Senior Environmental Project Man a HYDROGEOLOGIST Exp. y Enclosures: s� A Figure 1 —Vicinity Map TF OF CI,L�f�P Table 1 —Summary of Water-Supply Well Search Results Attachment A—The EDR Aerial Photo Decade Package—Former Rocket or Unocal Gas Station 5. ERM, 1995. Hunter Container Corporation Soil Sampling, 35275 Welty Road, Vernalis, CA 95385. April 18.