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.7 Ieolo icafTec hntcs inc. Pa e 3 Cityof Escalon g Project No. 750.3 October 31,2000 The treatment unit will be located within a secured, fenced area with corner bumper guards. The manifold will be equipped with control valves to route airflow from desired VEW's. Air intakes and exhaust stacks will be designed to prevent the entry of foreign matter. 2.4 Utilities Natural gas and 220-volt, single phase, electricity will need to be provided to the VETS enclosure. Natural gas service is provided to the store by an underground pipeline from PG&E. An additional meter will be installed on the line by PG&E so that natural gas can be supplied to the thermal oxidizer (TO). A hard pipe gas line will run from the building, underground in the planter, to the VETS enclosure. A licensed contractor will perform this installation. At the same time, 220-volt, single phase, electricity will be run from the building to the VETS enclosure. A licensed contractor will also perform this work according to code. 2.5 Extraction Blower The air will be extracted using a positive-displacement blower with a capacity of approximately 200 scfm at a vacuum at 10 inches of Hg column. A 7.5 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. 2.6 Emissions Treatment System The emissions will be treated using a thermal oxidizer (TO). Natural gas will be used as an auxiliary fuel source for the TO. Figure 3 is a schematic of the treatment unit. Specifications of the TO unit are enclosed in Appendix B. The blower and TO will be secured by a locked, chain-link fence. 2.7 Installation & Startup An Authority to Construct Permit by the San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD) will be secured once this Remedial Design 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 L It is proposed to operate the VETS 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. F {