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Riviera Estates Page 4 <br /> Our Project Number: E07092A <br /> June 26,2007 <br /> 3.0 PAST AND CURRENT SOURCES OF CONTAMINATION <br /> .3.1 Research Methods <br /> NOA employs a standard practice for review of database information. On a street map showing <br /> the location of the subject property, a circle is drawn one-quarter mile out from the property <br /> boundaries, and street maps or web-based mapping services are then used to determine <br /> address ranges for all streets within the quarter mile. All agency databases searchable by <br /> address are then searched for these address ranges. <br /> 3.1.1 Regional Water Quality Control Board <br /> NOA reviewed the Leaking Underground Storage Tanks (LUST) list (April 2007), the Water <br /> Purveyors Quarterly Report on MTBE (April 2007), and the Spills, Leaks, Investigations, and <br /> Cleanups (SLIC) list (15t Quarter 2005) on file with the Central Valley Regional Water Quality <br /> Control Board (CVRWQCB)4 in an attempt to determine if there are any files present at that <br /> agency which note the unauthorized release of a toxic or hazardous agent into the environment <br /> on the subject property or within a one-quarter mile radius of the subject property. The subject <br /> property was not listed on any of these databases. One address located at 3800 W. Country <br /> Club Boulevard and several listings for Rough & Ready Island were found within one-quarter <br /> mile of the subject property. Both locations are discussed in the following section. <br /> 3.1.2 San Joaquin County Environmental Health Department <br /> According to Diane Martinez5 of the EHD, no files were available for the subject property <br /> addresses of 4100 and 4108 Riviera Drive. <br /> The Underground Storage Tank Site Mitigation List, dated April 3, 2006 and the LOP/Non-LOP <br /> Sites list, dated July 20, 2004, were reviewed at the EHD on June 5, 2007. The following sites <br /> were found within one-quarter mile of the subject property: <br /> Stockton Golf/Country Club 3800 W. Country Club Boulevard, Stockton, CA <br /> According to EHD records, this file is listed as case closed. <br /> Rough & Ready Island Stockton, CA <br /> According to EHD records, several incident reports are on file for Rough & Ready Island. This <br /> site is a known source of contamination; however, based on the distance to the subject <br /> property, this site is not expected to pose a significant environmental impact to the subject <br /> property. <br /> a California Regional Water Quality Control Board, Sacramento, www.swrcb.ca.gov. <br /> 5 Personal Communication,June 14, 2007. <br /> NEIL O . ANDERSON <br /> AND ASSOCIATES <br /> "44 902 Industrial Way•Lodi, CA 95240 <br /> 02007 Neil 0. Anderson&Associates, Inc. <br />