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k'q KLEINFELDER permitted if it can be shown that it can be returned to a serviceable condition without impacts to soil and/or groundwater. SCOPE OF WORK Permitting and Pre-Field Activities Kleinfelder will coordinate with EHD to obtain necessary boring permits and setting up the Master File Record (MFR) for the site prior to conducting field work. The San Joaquin County EHD will require review and approval of the workplan for the proposed scope of work. Field Activities rSeptic Tank Clean out and Replacement LIn accordance with the EHD recommended protocols for returning the septic system to a serviceable condition, the septic tank will be replaced prior to re-use. Returning the septic L system to a serviceable condition will require; 1) flushing the tank of all of its contents and chlorination, 2) removing the contents from the site for disposal, and 3) removal and replacement of the tank. Confirmation sampling of the contents removed will be required for coliform bacteria prior to disposal off site. At this time we propose to have the contents of the septic tank removed to an above ground Lrholding tank on site for chlorination and testing prior to disposal off site. The off site disposal facility requires that the waste sludge not exceed 2 MPN/100 ml coliform bacteria. 4 Once removed from the septic tank the sludge will be chlorinated using a commercial chlorine bleach solution. The chlorination process will require approximately 1 gallon of chlorine bleach per 100 gallons of septic sludge to kill the coliform bacteria present. The bleach/sludge mixture will be agitated to optimize the chlorination process. Upon achieving a thorough mixing of the chlorinated/sludge, a confirmation sample will be Lcollected for laboratory analysis. The sample will be analyzed for total coliform organisms (MPN). The analysis of the sample requires that the sample be received and analyzed within 8 hours of the collection time. Kleinfelder will transport the sample to a local laboratory (Far West LLaboratory of Riverbank, California) for the analysis. Following the chlorination process and laboratory analysis of the sample (and depending if the L sample concentration is less than 2 MPN/100 ml), the sludge will be removed from the site for disposal. Disposal'transportation will be handled by Eco Safe Environmental Services of Fresno, California. The sludge will betransported to Clean Harbors Landfill located in Buttonwillow, i L California. Clean Harbors Landfill is an approved landfill for the disposal of hazardous waste. At this time it is proposed that the septic tank be removed, demolished on site for disposal at an �. approved landfill, and replaced. The tank will be excavated and removed to the ground surface L 34202.E01 /ST03R 1130 Page 2 of 7 Copyright 2003,Kleinfelder,Inc. August 8,2003 r