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Mr. Bruce Woody
<br />August 7, 2020
<br />Page 2
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<br />DAA plans to coordinate field and laboratory services, obtain groundwater samples (via Sherrill
<br />Environmental) from four monitoring wells, review sampling documentation received from field
<br />personnel, chemically analyze groundwater samples (via ENCO), and update the historical summary
<br />tables / graphs.
<br />
<br />During the subject sampling event, the laboratory will:
<br />▪ analyze samples obtained from two compliance wells (MW-21S, MW-21D) and two nature-and-
<br />extent wells (MW-23, MW-24) for the following constituents, as specified in the Underground
<br />Injection Permit: carbon dioxide, chloride, manganese, mercury, potassium, volatile organic
<br />compounds listed in NC-DEQ Appendix I
<br />
<br />Analytical results will be incorporated into a report pertaining to a regularly scheduled compliance
<br />sampling event.
<br />
<br />Task R00592-230N-03
<br />Groundwater Sampling Event 54 (Event 2020 S2)
<br />
<br />DAA proposes to conduct groundwater sampling event 54 at the Orange County Regional Landfill –
<br />North Facility during November, 2020.
<br />
<br />DAA shall coordinate field and laboratory services, obtain groundwater samples, review sampling
<br />documentation received from groundwater sampling personnel, chemically analyze groundwater samples
<br />(ENCO), validate analytical data provided by the contracted laboratory, update historical summary tables,
<br />and prepare a report suitable for direct submission to NC-DEQ.
<br />
<br />During the subject sampling event, the laboratory will:
<br />▪ analyze samples obtained from twelve compliance wells (6801-MW04, 6801-MW06R, 6801-
<br />MW07R, 6801-MW14A, 6801-MW14B, 6801-MW15, 6801-MW16, 6801-MW17, 6801-MW20,
<br />6801-MW21S, 6801-MW21D, 6801-MW22) and two surface water locations for the
<br />constituents listed in 40 CFR Part 258 Appendix I (15A NCAC 13B .1600), plus those
<br />constituents listed in Appendix II that have been previously and reliably detected at this facility
<br />(mercury, naphthalene, sulfide)
<br />▪ analyze samples obtained from four “nature and extent” monitoring wells (6801-MW21D2,
<br />6801-MW23, 6801- MW24, 6801-MW301), for the constituents listed in 40 CFR Part 258
<br />Appendix I (15A NCAC 13B .1600), plus those constituents listed in Appendix II that have been
<br />previously and reliably detected at this facility (mercury, naphthalene, sulfide)
<br />▪ analyze samples obtained from four wells (6801-MW21S, 6801-MW21D, 6801-MW23, 6801-
<br />MW24) for chloride and carbon dioxide
<br />▪ analyze samples obtained from four monitoring wells associated with the groundwater
<br />remediation injection program (6801-MW21S, 6801-MW21D, 6801-MW23, 6801-MW24) for
<br />the following additional inorganic constituents, in accordance with the approved Underground
<br />Injection Control permit: manganese, potassium
<br />DocuSign Envelope ID: C7A3140E-4A17-4E91-92BC-D87506B7FE8B
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