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xSoil Vapor Extraction and Air Sparging Performance Monitoring Plan Stockton Yard Maintenance Facility,Stockton Page 1-2 positive displacement vacuum blower. Soil vapor is piped from the four vapor extraction wells to the air/liquid separator. The air/liquid separator consists of a vessel which removes and stores water entrained from extracted soil vapor. The soil vapor is then treated in the oxidizer where TPH-G,and BTEX compounds are converted to CO2 and water vapor. In addition, contaminants volatilized by the AS are captured by the SVETS. The SUETS radius of influence was determined to be 35 feet (11 meters (m)) based on vacuum measurements obtained during the August 1996 soil vapor extraction pilot test performed at the site. The AS compressor is an Ingersoll Rand rotary screw Model No. XF7.5 rated at 31 cfm (878 L/min) and 100 pounds per square inch gage [(psig) (5172 mm Hg)]. It includes two oil coalescing filters. The AS radius of influence was determined to be 25 feet (7.6.m) based on pressure influence observed from the August 1996air sparge'pilot test. The compressor was sized to supply an air flow rate of approximately 5 cfm (142 L/min) per sparge injection point. Compressor accessories include an electric motor of NEMA design, electrical control switch,v-belt drive with totally enclosed drive guard, pressure switch and safety valve,mounting stand, three micron inlet particulate filter, discharge pressure gage, hour meter,mounting frame, 80-gallon (303 L) ASME-coded horizontal receiver tank,and receiver condensate drain valve. 1.3 System Controls The cause of an automatic oxidizer shutdown which results from operating conditions that exceed a programmed controller limit is displayed with a red alarm light located on the front of the oxidizer control panel. The following table lists the Processor Controlled Alarm Set Points for the King, ( Buck Technology system. 1 ' Item Low High Description TE301 600° F 316°C N/A Oxidizer Inlet Temperature TE302 N/A 1200 °F 649°C Oxidizer Exit Temperature FT101 20 scfm 566 L/min N/A Low Process Flow LS103 N/A . High Air/Liquid Separator High NIA=Not Applicable scfm=sandard cubic feet per minute AS system controls include automatic air compressor start up and shutdown switches which are activated based on receiver vessel pressure settings.The air compressor motor also has a motor overload protection switch which is activated if the motor amperage or temperature is too high, or the motor input voltage is too high or low. The AS compressor is also electrically interlocked with the oxidizer such that an oxidizer shut down (automatic or manual)will result in automatic shut down of the AS. This interlock control is designed to ensure that contaminants volatized by AS are captured and treated by the SUETS. DAPMP\Stockton Yard PMP.doc