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DocuSign Envelope ID:6CF06457-7118-4304-9934-67C64310797A <br /> r, Proposal for RI—Additional Groundwater, Landfill Gas and Soil Characterization <br /> �S$ <br /> Hillsborough Dump <br /> ID No. NONCD0000483 <br /> Task Orders 483DP-15, 16, 17 and 18 <br /> S&ME Project No.4305-17-061F <br /> Date and time began/ended; <br /> Ambient temperature, humidity,and barometric pressure readings at least hourly; <br /> Verification of field instrument calibration; <br /> Additional field calibration as needed for changing field conditions; <br /> Duplicate readings from at least one background and two probes; <br /> Detection limit of each instrument used; and <br /> A table that includes sample location, readings, and notations of other things that may affect the results <br /> (e.g.water trap,filters, increasing barometric pressure, significant change in temperature, etc.). <br /> Subtask C Background Soil Sampling <br /> Three soil borings(S13-101 through S13-103) are proposed to be advanced at locations shown on Figure 2 for the <br /> collection of background soil samples. Final boring locations will be chosen in the field and will be located away <br /> from roadways, railways, parking areas and other apparent potential sources of contamination. Macrocore <br /> samplers with acetate sleeves will be used to collect samples. Two samples will be collected from each boring <br /> from approximate depths of 1 to 3 feet below ground surface(bgs) and 6 to 8 feet bgs. No sample will be <br /> collected from 0 to 6 inches bgs. <br /> Subtask D Project Management, Coordination & Support <br /> Project Management,Coordination and Support services include: <br /> Provide project management and technical support to field staff. <br /> Field and laboratory data quality review. <br /> Provide project management and communication with Orange County and NCDEQ. <br /> Task 483DP-17 Groundwater Sampling and Landfill Gas Screening <br /> Subtask A Groundwater Sampling <br /> S&ME will return to the site approximately one month following the previous groundwater sampling event(Task <br /> 483DP-16,Subtask A) and sample groundwater at MW-4, MW-6, and MW-7,as described above. <br /> Subtask B Field Screening of Landfill Gas <br /> S&ME will return to the site approximately one month following the previous screening event(Task 483DP-16, <br /> Subtask 8)and screen landfill gas using portable, hand-held meters at GP-6, as described above. Samples will not <br /> be collected for laboratory analysis. <br /> Subtask C Project Management, Coordination & Support <br /> Project Management, Coordination and Support services include: <br /> Provide project management and technical support to field staff. <br /> Field and laboratory data quality review. <br /> December 17, 2020 6 <br />