Agenda - Council - 10/22/1985 - Laserfiche WebLink

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Mr. Daniel A. Comeau September 25, 19~1!, Page Fourteen and QA/QC Plan and associated addenda. For the sake of discussion, if it is assumed %hat the submitted reports will be approved October 1, then the Final Report will be due February 1, 1986. A significant portion of the Remedial Investigation has already been completed at this time. The reference to the completion date of December 1985 was made based on an earlier time estimate and included other commitments outside the Consent Order requirements. Twenty-two groundwater monitoring wells were installed during February and March 1985. After resolving some problems with sampling equipment, water sampling events have been conducted July 22-26 and August 28-30. A third sampling event is scheduled to take place as soon as water quality data from the second sampling event can be reviewed and evaluated. A drilling program consisting of four additional groundwater monitoring wells (which was approved by MPCA) was initiated September 12, 1985. It is possible that additional supplementary drilling and water sampling events may be necessary in the future. The need for additional monitoring activities and timing for these activities can only be determined as additional data become available and evaluated. It is anticipated that MPCA will continue to be provided with water quality data, water level data, and drilling records as they become available. Furthermore, it is expected that MPCA staff will be informed of activities on a periodic basis and that significant changes or additions to the program will be documented and provided to MPCA. It is understood that the major purpose of the Remedial Investigation is identification of groundwater impacts, and therefore, potential impacts to off-site domestic wells. It is anticipated that additional phases of monitoring work may be conducted, particulary in the area of MW-16B and MW-4B. Quality Assurance/Quality Control Plan Addendum 39. An expanded QA/QC Plan will be provided by ETC in October for MPCA review. The QA/QC Plan Addendum will cover provisions of 'Interim Guidelines and Specifications for Preparing Quality Assurance Project Plans," QAMS-O05/80, U.S. Environmental Protection Agency, December 2g, 1980, and "Preparation of State Lead Remedial Investigation Quality Assurance Plans for Region V," U.S. Environmental Protection Agency, April 4, 1984.