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444 <br /> r) <br /> t1 _. <br /> 4.0 METHODS AND PROCEDURES <br /> 4.1 Site Survey <br /> A survey of the subject property was conducted on October 24, 1994. The purpose of the <br /> on-site survey was to visually identify activities that may have impacted the subject <br /> property. The on-site survey results are presented in Section 5.1.1. <br /> 4.2 Off-Site Reconnaissance <br /> An off-site reconnaissance(not greater than 1/2-mile radius}was conducted on October 24, <br /> 1994.The purpose of the off-site reconnaissance was to visually identify activities and/or <br /> practices that may have impacted the subject property.'the results of the off-site <br /> reconnaissance are presented in Section 5.2.1. <br /> 4.3 Literature and Records Search ' <br /> The following sources were reviewed by Enviros to evaluate prior land use on-site and <br /> properties adjacent to the subject property. <br /> • Tracy Public Library(Tracy, California). <br /> • Sanborn Company (Pelham,New York). <br /> • San Joaquin County Environmental Health Department(Stockton,California) <br /> • Regional Water Quality Control Board,Central Valley Region(Sacramento, <br /> California). <br /> • Pacific Aerial Survey (Oakland, California). ' <br /> • California Environmental Protection Agency(Sacramento,California). <br /> • Unocal Corporate Files(Brea,California). <br /> • City of Tracy Building Department(Tracy,California) <br /> • City of Tracy Fire Department(Tracy,California) <br /> 2 <br />