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' 28 May 1991 <br /> GeoAudit CV 43C4 . 1. 1 - Work Plan for Vacuum Extraction <br /> Page 7 of 10 <br /> 5. SYSTEM TESTING <br /> Previous testing of the exhaust gases has shown that the emissions <br /> from the ET Vaclean 1000 are comparable to those of any similar <br /> catalyst-equipped internal combustion engine. The testing indicated <br /> that the destruction efficiency of purgeable organic hydrocarbons <br /> was greater than 99%. Table 1 presents the destruction efficiency <br /> ' and emission data obtained by analyzing intake and exhaust gas <br /> samples during a test run of the system and during an actual field <br /> performance test. <br /> ' In order to estimate the radius of influence of the extraction <br /> well, a performance test is conducted within the first week of <br /> operation. We believe that a radius of influence of greater than 15 <br /> feet will be achieved, exceeding the probable lateral extent of the <br /> contamination plume in the vadose zone. <br /> 6. EQUIPMENT AND OPERATIONAL SAFETY <br /> The remediation action is supervised by on-site geologists/ <br /> ' technicians trained to perform and supervise investigations and <br /> remedial actions at hazardous waste sites as specified in the OSHA <br /> Hazardous Waste Operations and Emergency Response Standard (29 CFR <br /> 1910 . 120 (e) ) . The maintenance of the unit is performed by factory- <br /> trained GeoAudit personnel. <br /> The ET Vaclean 1000 is equipped with a low oil pressure and/or high <br />' coolant temperature safety system, which in case of malfunction <br /> turns the ignition and the fuel off. In addition, the engine <br /> becomes inoperative when the air-to-fuel ratio can not be <br /> maintained within certain limits. <br /> The system is installed in an enclosed and lockable structure to <br />' protect the system from tampering by unauthorized personnel. A non- <br /> smoking area of 20 feet radius is established. <br />' 7 . HYDROCARBON DESTRUCTION AND HEALTH RISK FACTOR <br /> Based upon the existing site assessment data, approximately 3 , 000 <br /> gallons of gasoline had been released to the soil, indicating a <br /> total mass of approximately 18, 500 pounds. Please note again that <br /> the figures presented here are liberally calculated. A destruction <br /> rate of greater than 90% is anticipated. The plan calls for an <br />' average daily air emission of 5 lbs of TPH. It is therefore <br /> anticipated that the vacuum extraction is operational for <br /> approximately 12 months. <br />