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!c'Js})�J '..:- - w.M ,rr i-.'*r >1{,. 1,3 tip ,...fit Its i .d i�r et.S��,'i!ri,� „t ht..�a' ..1`-. <br /> s k <br /> s' <br /> 15 February 2000 <br />' AGE-NC Project No 98-0448 <br /> Page 10 of 33 <br /> I A plot of DO measurements versus time indicated initial increases to EW-1 and MW-4A after two <br /> hours of IAS operation and sigluficant increases from MW-1 and MW-2 after twenty-two hours of <br /> operation (Appendix G), significant DO changes were not observed at MW-6 A summary of DO <br /> field observations is included with Tables 3, 4, 5, 6 and 7 <br /> Review of OV measurements collected during the IAS pilot test indicated increased OV readings in <br />' observation points MW-1,,MW-2, MW-4A and EW- 1 (Appendix G) <br /> No significant ground water elevation changes were observed in wells MW-1,MW-2,MW-4A,EW- <br /> 1 and MW-6 <br /> 4 2 1 Induced Pressure <br /> The greatest IP measurements were recot ded from well EW-1 (screened 15 to 45 feet bsg),well EW- <br /> 1 is located approximately 4 feet north of IAS well MW-4B Significant IP measurements were <br /> recorded from well MW-2 (screened 20 to 40 feet bsg) located approximately 12 feet northwest of <br /> IAS well MW-4B Significant IP measurements was recorded from well MW-4A (screened 8 to 33 <br /> feet bsg), well MW-4A is screened approximately 12 feet above well MW-4B Generally, IP <br /> measurements fluctuated between 3 and 21 inches of water to EW-1, between 0 5 and 23 5 inches <br /> Iof water to MW-2 and between 1 7 and 15 inches of water In MW-4A <br /> Monitoring points MW-1 (screened 20 to 40 feet bsg) and MW-6 (screened 10 to 35 feet bsg) <br /> recorded positive IP measurements during the IAS pilot test Monitoring well MW-1 is located <br /> approximately 15 feet west-northwest of MW-4B and MW-6 is located 50 feet south-southwest of <br /> MW-4B 1P measurements recorded from wells MW-1 and MW-6 were generally between 0 02 and <br /> 0 80 inches of water <br /> 4 2 2 Dissolved Oxygen <br /> The overall increase of DO in wells EW-1,MW-1, MW-2 and MW-4A indicates circulation of the <br /> injected air and augmentation of DO content in the ground water surrounding sparging point <br /> MW-4B, MW-1 and MW-2 appear to be at the fringe of the DO zone of influence <br /> 4 2 3 Organic Vapor <br /> IGenerally, substantial OV increases were observed from MW-4A and MW-2 at the start of IAS <br /> operation, from EW-1 after 2 hours of 1AS operation and from MW-1 after 4'/2 hours of IAS <br /> Advanced GeoEnvironmentsl,Inc <br /> I <br />