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LFR Inc. <br /> perforated intervals) was not available. However, Ms. Ellsaesser added that the owner <br /> was instructed to destroy this well by November 30, 2004 in accordance with San <br /> Joaquin County - Environmental Health Department Protocol. According to <br /> information obtained from the California Regional Water Quality Control Board <br /> website, the address of this well is listed as 9951 Lower Sacramento Road and the Well <br /> No. is 3901286-0001. This well was reported used to supply water to the commercial <br /> park adjacent to the Site. <br /> 5.1.15 Septic Systems <br /> No indications of onsite septic systems or cesspools were observed during the Site visit <br /> and according to Mr. Rubino, the site vicinity is currently connected to the municipal <br /> sewer system. Based upon evidence of a historic structure located at the Site, it is <br /> possible that a septic tank and leach field were installed for the former structure located <br /> at the western site boundary; however, no evidence was found. If a septic system is <br /> found during future development activities, it should be removed in accordance with <br /> regulatory guidelines. <br /> 5.1.16 Heating/Cooling <br /> LFR observed no heating/cooling systems during the site visit. <br /> 5.1.17 Stains or Corrosion <br /> LFR observed no areas of stains or corrosion during the Site visit that would present an <br /> environmental concern to the Site. <br /> 5.1.18 Drains and Sumps <br /> LFR did not observed drains or sumps during the Site visit. <br /> 5.1.19 Water Intrusion <br /> LFR did not observe buildings on the Site. As a result, water intrusion and/or staining <br /> do not apply. <br /> 5.1.20 Radon <br /> According to the U.S. EPA, the Site is located in a Zone 3, an area with expected <br /> radon levels to be less than 2.0 picoCuries/liter (pCi/L) of air. According to the EDR <br /> database report, 3 residential structures were analyzed by the State of California <br /> Department of Health Services for radon gas in the site's zip code (95210). One of the <br /> 3 structures reported a level of radon which exceeded the EPA recommended action <br /> level of 4.0 pCi/L of air. The exact level detected was not reported. According to the <br /> 003-09746-M 1erSaz�wRmd_&Homes_PhM 1 ESAxW Page 13 <br />