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1 <br />The City of Everett <br />The Floyd & Snider Team Everett Landfill/Tire Fire Site <br />4.6.3 REPORTING REQUIREMENTS <br />A bi-annual Confirmational Monitoring report will be submitted to Ecology that describes <br />monitoring results and includes all the data collected during the previous two years. Each bi- <br />annual report will consist of copies of validated laboratory data, a summary table of the <br />validated data, a table showing water level monitoring data, a statistical summary of the data, <br />and a cover letter that describes the evaluation of the data. The fifth bi-annual report (after 10 <br />years of Confirmational Monitoring) will make recommendations regarding continued monitoring <br />frequency and locations. <br />Ecology will be notified within 7 days of any confirmed exceedance that triggers contingency <br />plans. <br />4.7 DATA EVALUATION <br />4.7.1 DATA VALIDATION <br />All chemistry data will be validated according to United States Environmental Protection Agency <br />(USEPA) data validation guidelines (USEPA, 1994a and 1994b). Data validation will include <br />evaluation of holding times, method blank results, surrogate recovery results, field and <br />laboratory duplicate results, completeness, detection limits, laboratory control sample results, <br />and chain -of -custody forms. A detailed description of the data validation procedures is provided <br />in the sampling and analysis plan, to be developed in accordance with the Scope of Work and <br />Schedule, Exhibit D to the Consent Decree. After the data has been validated, it will be entered <br />into the project database with any assigned data qualifiers. <br />4.7.2 EVALUATION MONITORING DATA MANAGEMENT AND EVALUATION <br />At least ten scheduled sampling events will be conducted during the three-year Evaluation <br />Monitoring period. All groundwater sampling quality results will be validated for data quality and <br />managed in an electronic database. Each analyte will be tested for frequency of detection and , <br />compared to previous results and cleanup levels. <br />At the end of the Evaluation Monitoring period the data will be evaluated and an appropriate <br />statistical method selected to determine statistical parameters for the data set. The rationale for <br />the proposed statistical methodology will be presented to Ecology for approval. The selected <br />statistical method will conform with the requirements of MTCA (WAC 173-340-720), Statistical <br />Guidance for Ecology Site Managers (Ecology Pub. 92 54) and Statistical Methods for Ground <br />Water Monitoring at Municipal Solid Waste Facilities (WAC 173-351-420) to determine statistical <br />parameters of ground water results appropriate to the data set. <br />4.7.3 PERFORMANCE MONITORING DATA MANAGEMENT AND EVALUATION <br />At least twenty sampling events will be conducted during the minimum ten-year Performance <br />Monitoring period. Additional years of Performance Monitoring sampling events may be <br />F: f F maker I 1csCo s Hance R Everett Land iMC - a .do Compliance Monitoring and Contingency Plan <br />docslCompliance Monitoring PIan1CMCP 11-10-OO.doc <br />FINAL - March 2001 Page 4-10 <br />