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showed a significant decrease in dissolved oxygen between June and July The increase is <br /> not limited to those wells located close to ORC infection borings, so it is probably <br /> premature to conclude that the increase is due to ORC or that increased DO is responsible <br /> for the lower hydrocarbon concentrations measured during this quarter However, both <br /> trends are encouraging and continued monitoring may demonstrate that remediation has <br /> been successful <br /> The first three-month period of dissolved oxygen monitoring required by PHS/EHD has <br /> now been completed In accordance with the work plan, dissolved oxygen monitoring will <br /> resume during the fourth quarter of the year, beginning in October <br /> 4.0 DISPOSAL OF PURGED GROUNDWATER <br /> Four 55-gallon drums (approximately 200 gallons) of purged groundwater accumulated <br /> during monitoring actrvites in April and May, and Upgradient obtained approval from Mrs <br /> Conrady's attorney, Neumiller & Beardslee, to dispose of this water to make room for <br /> additional water extracted dunng subsequent monitoring events Upgradient subcontracted <br /> the transport and disposal of the water to Amenclean, Inc , which transported the water <br /> under non-hazardous manifest to its disposal facility in Silver Springs, Nevada on June 2, <br /> 1998 A representative of Upgradient was on site during loading to supervise the pumping <br /> of the water into Amenclean's vacuum truck A copy of the bill of lading is attached in <br /> Appendix C <br /> 4 <br />