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9 <br /> December 21, 2010 <br /> HWA Project No. 98165 <br /> • Conventional Analytes: chloride <br /> • SVOCs: bis(2-ethylhexyl)phthalate <br /> HWA will send the samples to CCI Analytical Laboratories, Inc. for organic analyses, <br /> and to the Everett Environmental Laboratory for inorganic analyses. In addition to the 9 <br /> monitoring well samples, QC samples, including one duplicate, one field blank, one <br /> matrix spike and one matrix spike duplicate will be submitted for analysis for each <br /> sampling event. HWA will measure ground water levels at each of the monitoring wells <br /> at the start of each sampling round in order to monitor changes in the ground water <br /> gradient. <br /> Reporting- HWA will prepare five annual data reports during the initial performance <br /> monitoring phase. The data reports will consist of laboratory data, summary tables of the <br /> data, a table showing water level monitoring data, and a cover letter describing the <br /> evaluation of the data, in accordance with the CMCP. <br /> Surface water performance monitoring will not be conducted as no contaminants were <br /> detected above the cleanup standard at the point of compliance for any of the surface <br /> water sampling locations sampled during evaluation monitoring (CMCP 6.3). <br /> TASK 1B - LANDFILL GAS PERFORMANCE MONITORING <br /> The CMCP requires quarterly landfill gas monitoring along the perimeter of the landfill <br /> and in some locations within it(CMCP, 3.3.2). It also requires monitoring of onsite and <br /> adjacent offsite structures for combustible gas.. Landfill gas monitoring will include <br /> sampling perimeter and interior landfill gas probes and monitoring breathing space, floor <br /> cracks, drains and other earthen exposures within off site properties where landfill gas <br /> has previously been detected. Monitoring of off site buildings on the north side of 36th <br /> street and west of the landfill,will be performed for structures which have shown <br /> measured concentrations of landfill gas during the previous three years of monitoring <br /> (CMCP, 3.4.3.2). <br /> Gas monitoring will consist of measuring landfill gas within the probes for percent <br /> concentrations of methane, carbon dioxide and oxygen. Gas pressure within the probes <br /> will also be measured and ambient atmospheric pressures recorded. <br /> Calibration, maintenance, and repairs of the gas alarms installed at the Port Property <br /> (Diversified Industries /Marvel)will also be preformed on a quarterly basis. <br /> Reporting- After each round of monitoring, HWA will update the landfill gas database <br /> and submit it to the City of Everett. HWA will also prepare annual landfill gas <br /> monitoring reports as per the CMCP. <br /> HWA will report all out-of-compliance situations to the City as required in the CMCP. <br /> 88 <br /> 2010 Exhibit A 12 21 10.doc 3 HWA GEOSCIENCES INC. <br />