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Geologual rechmcs 14C Page 3 ' George's VETS Work Plan Addendum May 10,2002 lie f2.3 Utilities 220-volt, single phase, electricity will need to be provided to the VETS enclosure A ' licensed contractor will install a sub-panel, equipped with a meter, at the main power box to allow for the VETS power usage to be reimbursed by the USTCFP 2.4 Extraction Blower - The air will be extracted using a positive-displacement blower with a capacity of approximately 50-100 scfm at a maximum vacuum of 3-inches of Hg column A 2 5 horsepower, single-phase electrical motor powers the blower The extracted air first passes through a liquid knockout unit and a fabric filter to protect the blower against rapid wear from sediment particles coming from the extraction wells Entrained water will be condensed and collected in water knockout drum(s) Collected water will be containerized in DOT-approved drums, labeled and stored on site The condensed water will be hauled to a petroleum recycler 2.5 Emissions Treatment System The emissions will be treated using granular activated carbon while the emissions are above 2-pounds/day The carbon will be contained in two 55-gallon carbon barrels, linked in series, specifically designed for vapor extraction Once the concentrations have dropped to levels that the SJVUAPCD does not require treatment, the carbon system will be removed so as not to incur additional, unneeded costs ' 2.6 Installation & Startup An Authority to Construct Permit by the San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD) will be secured once this work plan has been approved After the VETS has been installed and is operational, a SJVUAPCD inspection will be called for in order to obtain a permit to operate 3.0 OPERATION & MAINTENANCE It is proposed to operate the bio-venting/vapor extraction for a period of three months At the end of the three-month period, the data will be reviewed and decisions made as to whether continued operation will be necessary, if modifications or additions to the system will be needed to improve remedial results or if vapor extraction is not providing any remedial benefits to the site Maintenance of the VETS will include monthly monitoring of the oil levels in the blower, cleaning of the filter and any other items deemed necessary by the mechanic ,Sl bmh,4 a((�'"`,�� If the vapor concentration in the extraction stream drops to less then—25ppm during the first ' two months of the period, the extraction system will be shut off for a period of two weeks At the end of two weeks the system will be restarted and run for the remaining time in the total three-month test This will allow for the determination if the system could be run in a more economical mode of"on for several days and off for several weeks" �jkt& ik411�rr��