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av <br /> 4 <br /> B:\CYLOPURG.pOC <br /> S <br /> 7. Sample results of the influent-effluent to the Cyclo <br /> Purge show 5% more TFH being exhausted than being <br /> delivered to the cyclo Purge (vacuum stripping of the <br /> condensate-to high a vacuum) , 1.6% benzene being <br /> removed, 10.6% toluene being removed, 14.8% ethylbenzene <br /> being removed and 12% xylenes being removed. <br /> i <br /> 8. The analysis of the water sampled from the collection <br /> bucket showed low dissolved TFH-BTEX. <br /> J <br /> 9- A flow rate of 70 cfm was being achieved with the one <br /> 606 blower: 15 cfm from the excavation, 35 cfm from <br /> *SWI, and 20 cfm frnm Mw5. <br /> 10. Total pounds of hydrocarbons removed dolly <br /> rom <br /> formation: 137 TFH, 4.26 Benzene, 9.88 Toluene, and f5.9 <br /> i Xylenes. <br /> 11. Total pound of hydrocarbons being emitted <br /> from <br /> Purge daily: 143.9 TFH, 4.2 benzene, 8.8 tolueneyclo and <br /> 5.2 xylenes. <br /> As has been shown above the system was not efficient in condensing <br /> out the water and hydrocarbons from the vapor stream. In <br /> actuality all that was being accomplished was placing a blower on <br /> the wells and exhausting into charcoal with some minor removal of <br /> water. <br /> 1f <br /> Our Pilot Test using a 100 cfm blower with condensate drums on the <br /> influent and effluent of the blower and exhausting into charcoal <br /> accomplished the following: A total flow rate of 30 cfm, removal <br /> of an average 60 lbs/day hydrocarbons, condensing of 3 gallons of <br /> fluid a day. With the increase in blower size the hydrocarbon <br /> removal has been increase from 60 to 144 <br /> lbs/day (x2.4) . <br /> Samples from the extraction wells and influent and effluent of the <br /> 1 condensate tank (still vacuum side of um <br /> afternoon an Hay 21, 1991, showed the follow obtained obtained the <br /> 1. Ground water monitoring wells MW1 and MW5 are producing <br /> the most hydrocarbons, from the ground water. <br /> 2• The low flow rates and hydrocarbon production from the <br /> excavation and pump island weds, indicate that these <br /> areas have low permeability and low levels of <br /> hydrocarbon contamination. <br /> 3. The influent and effluent samples indicated a 15.5 <br /> removal of total__hydrocarbons.---------- —------- <br /> ,rT <br /> On May 22, 1991 late afternoon, a site visit was conducted to <br /> evaluate the effect the orifice manifold had on increase in vacuum <br /> to the pump and to place the pump on the pressure side of the <br /> 2 <br />