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r <br /> 04010 Kcal Techlacs 11tc. R <br /> c C40109kat <br /> 1101 7" Street <br /> Modesto,California 95354 <br /> (209)522-4119/Fax#522-4227 { <br /> � t <br /> - Septic System Remediation & Soil Testing <br /> Tri-Plex Rental <br /> 4602,4604,4606 E. Cherokee Road <br /> Stockton, CA 952115 <br /> March 11, 2004 <br /> Project No. 1128.2E <br /> I <br /> 1.0 INTRODUCTION <br /> The subject property is used for residential purposes��and has a tri-plex structure that is <br /> served by city water service and onsite septic tank/ileach line system. The system is <br /> L <br /> constructed of two 1200-gallon septic tanks, set in series, and three parallel leach lines that <br /> are 95 ft long, connected at a distribution box, and rum�south of the tanks. The two outside <br /> leach lines terminate in drainage pits that are 25 feet deep. The leach line trench and pits <br /> are filled with rock and gravel. !� <br /> �e f <br /> Approximately September 18, 2003, the septic was discovered to contain certain unknown <br /> volatile organic compounds. This condition was found at the time the tank was scheduled <br /> for routine pump out. A sample was collected from th'e first compartment of the first tank <br /> and tested for volatile organic compounds and semi-volatile organic compounds. A number <br /> j of chemical compounds were found, including benzene, ethyl benzene, toluene, s <br /> L dibromochloromethane, certain methylphenol compounds, benzoic acid, and certain <br /> phthalate compounds. !: <br /> A follow-up sample was collected from the second chamber of the second tank on October } <br /> 2, 2003. This sample was tested in a similar manner as described above and was found to <br /> contain similar compounds,but at lower concentrations.!i,. <br /> i <br /> On October 17, 2003, Mr. Michael Infurna of SCEHD issued a letter requesting certain <br /> testing work to determine if these chemicals have been released from the septic tanks into <br /> the environment. This report presents the detail of the testing work performed, plus the <br /> work that was performed to remove the contents of the septic tanks, tank inspection, and <br /> content treatment and disposal. t {{ <br />