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PES Environmental, Inc. <br /> Ms. Emily Cushman <br /> November 4, 2016 <br /> Page 5 <br /> Quarterly Monitoring of On-Site Water Supply Wells <br /> During the supplemental investigation, initial monitoring well sampling and on a quarterly <br /> basis thereafter, groundwater samples from the two on-site water supply wells located in <br /> closest proximity to the study area will be collected and analyzed for TPHg and VOCs. <br /> Quarterly monitoring of the water supply wells will continue until the petroleum-hydrocarbon <br /> affected groundwater plume is defined and it is determined that the water supply wells are not <br /> threatened. The results of this monitoring will be provided initially in the supplemental <br /> investigation report and in quarterly monitoring reports thereafter. <br /> DATA EVALUATION AND REPORTING <br /> Upon receipt, PES will compile the field observation data and soil and groundwater analytical <br /> results to better assess the extent of hydrocarbon-affected soil and groundwater. A report will <br /> be prepared which: (1) documents sample collection methodologies; (2) provides the results <br /> of PES' evaluation with tabulated analytical data and a graphical presentation of the soil and <br /> groundwater data; and (3) provides recommendations for further investigation, if warranted. <br /> Support documentation, such as boring logs and laboratory reports, will also be provided as <br /> appendices to the report. <br /> SCHEDULE <br /> The investigation will commence within two to three weeks of the Board's approval of the <br /> Work Plan depending on drilling subcontractor availability and obtaining drilling permits. It is <br /> anticipated that the field activities associated with the supplemental soil and grab groundwater <br /> sampling will be completed in two days. Soil and groundwater samples will be submitted <br /> promptly to the project laboratory for analysis following standard scheduling (five business <br /> days turnaround). Once the data is received, PES will determine suitable locations for <br /> installation of the groundwater monitoring wells and submit our installation plan to the Board <br /> for concurrence. <br /> The draft investigation will be provided to the Board for review approximately three to four <br /> weeks following receipt of the analytical data. Should unexpected scheduling delays occur, <br /> PES will provide notification to Board staff of the encountered delays and a revised schedule. <br /> We trust that this is the information you require at this time. <br /> 148400101wao5.docx <br />