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DocuSign Envelope ID: D3F23F86-A740-4F6C-8F1F-3ED35AB81D1C
<br /> Mr. Bruce Woody
<br /> May 9, 2019
<br /> Page 4 of 12
<br /> Task R00592-216N-04
<br /> Groundwater Sampling Event 53 (Event 2020 S1)
<br /> DAA proposes to conduct groundwater sampling event 53 at the Orange County Regional Landfill — North
<br /> Facility during May, 2020.
<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 /> During the subject sampling event, the laboratory will:
<br /> ■ analyze samples obtained from three monitoring wells associated with the sanitary landfill (6801-
<br /> MW6R, 6801-MW7R, 6801-MW17), or the constituents listed in 40 CFR Part 258 Appendix 1 (15A
<br /> NCAC 1313 .1600), plus those constituents listed in Appendix 11 that have been previously and reliably
<br /> detected at this facility(mercury, naphthalene,sulfide)
<br /> ■ analyze samples obtained from nine monitoring wells associated with the sanitary landfill (6801-
<br /> MW4, 6801-MW14A, 6801-MW14B, 6801-MW15, 6801-MW16, 6801-MW20, 6801-MW21 S, 6801-
<br /> MW21 D, 6801-MW22), for the constituents listed in 40 CFR Part 258 Appendix 11 (15A NCAC 13B
<br /> .1600)
<br /> ■ analyze samples obtained from two "nature and extent" monitoring wells (6801-MW23, 6801-
<br /> MW24), for the constituents listed in 40 CFR Part 258 Appendix 1 (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 additional wells (6801-MW21 S, 6801-MW21 D, 6801-MW23,
<br /> 6801-MW24) for chloride and carbon dioxide
<br /> ■ samples shall be obtained from four monitoring wells associated with the groundwater remediation
<br /> injection program (6801-MW21 S, 6801-MW21 D, 6801-MW23, 6801-MW24), for the following
<br /> additional inorganic constituents, in accordance with the approved Underground Injection Control
<br /> permit: manganese, potassium
<br /> ■ analyze samples of surface water obtained from two locations along Old Field Creek, for the
<br /> constituents listed in 40 CFR Part 258 Appendix 11 (15A NCAC 13B .1600)
<br /> ■ analyze additional samples obtained from well MW-04 for constituents required by regulations for
<br /> monitoring of C&D landfills (manganese, iron, chloride, sulfate, total dissolved solids, alkalinity)
<br /> ■ analyze additional samples obtained from well MW-04 for quality control parameters
<br /> ■ analyze one trip blank for quality control parameters
<br /> Blacksburg, VA •Charlottesville, VA -Hampton Roads, VA -Richmond, VA -Manassas, VA,
<br /> Fayetteville,NC-Raleigh,NC
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