Remedial Investigation/Baseline Risk Assessment for the Ravines and Beach Area Study Areas of the Surplus Operable Unit, Fort Sheridan, Illinois, Volume 2 - RI Appendices J-Q
QST ENVIRONMENTAL INC ST LOUIS MO
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Fort Sheridan performed validation of analytical data that were collected during the Phase I Remedial investigation RI in 1990 to 1991. As required by the Final Overall Quality Assurance Project Plan Remedial Investigation Feasibility Study, Fort Sheridan, Illinois OQAPP, Environmental Science Engineering, Inc. ESE, 1995, the validation was performed in accordance with the U.S. Environmental Protection Agency USEPA Contract Laboratory National Functional Guidelines. The results of the validation can be found in detail in the Final Data Validation Report ECG, April 1996. The data validation process resulted in some of the data being assigned qualifiers R meaning rejected and J meaning estimated. The significance of these two qualifiers on data usability for the RI was discussed between representatives of Fort Sheridan, USEPA, Illinois EPA, the U.S. Army Environmental Center USAEC, and ESE. It was determined from this discussion and regulatory comments that resampling of most of the rejected R-flagged data would be conducted to replace the Phase I data. Also, at least 10 percent of the J-flagged samples would be resampled reanalyzed and compared with the Phase I results to provide an indication of overall data quality.
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