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+ ~_.--- <br />' -. <br /> <br />• -3- • <br />Samples are taken on a quarterly basis starting in December, 1975 <br />and continuing. Early analysis was as specified by the then <br />current EPA standards for water pollution. Results are on file <br />at Occidental's Grand Junction office where they may be examined. <br />Five deep wells are being monitored for level and quality. <br />Samples are taken on a quarterly basis and were started in Feb- <br />ruary, 1976. Early analysis was as specified by the then current <br />EPA standards for water pollution. <br />Occidental Oil Shale, Inc. will apply to the Water Quality <br />Control Commission for a subsurface disposal permit prior to <br />conducting any further retort burns. <br />Due to the very small amounts of water encountered in the <br />mining zone at Logan Wash, any disturbance to the prevailing <br />hydrologic balance will be minimal. A long term water balance <br />and other hydrologic relationships will be determined through <br />the Hydrologic Monitoring Program now being implemented through <br />a joint program with the Department of Energy. Details of this <br />program can be made available if desired. (See attached excerpt <br />from letter from Geothermal Surveys, Inc.) <br />Stabilization management of present and planned retorts will <br />involve isolating the retort(s) from contact with groundwater or <br />~c isolat~~such groundwater as may come into contact with the <br />materials in the retort(s). <br />