WORK PLANS FILE 1 - Laserfiche WebLink

Home Browse Search

' • � Page 3 Cleologica(Tecknics Inc. George's Service Project No. 425.3 February 5,2002 as air recharge point. It is not planned to extract from this well due to the cost of trenching through the asphalt. 2.3 Utilities 220-volt, single phase, city will need to be licensed contractor will install provided asub panel, equipped witha 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 one year. At the end of the one-year period, the data will be reviewed and decisions made as to whether further vapor extraction will be necessary. 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. Once vapor concentrations drop to a very low level (— 25ppm),the blower may be shutdown for periods of 30-days at a time. This will allow contaminant vapors to seep back into the excavation backfill and can then be removed quickly after only a couple of days of