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Mr. Bruce Woody <br />August 7, 2020 <br />Page 3 <br /> <br /> <br />▪ analyze samples obtained from nine monitoring wells (6801-MW04, 6801-MW110S, 6801- <br />MW110D, 6801-MW21S, 6801-MW21D, 6801-MW21D2, 6801-MW23, 6801-MW24, 6801- <br />MW301) for hexavalent chromium <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 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 additional samples obtained from well 6801-MW04 for constituents required by <br />regulations for monitoring of C&D landfills (manganese, iron, chloride, sulfate, total dissolved <br />solids, alkalinity) (well 6801-MW04 is associated with the monitoring programs for both the <br />active C&D landfill and North sanitary landfill) <br />▪ analyze additional samples obtained from well 6801-MW04 for quality control parameters <br />▪ analyze one trip blank for quality control parameters <br /> <br />DAA will prepare one printed copy of the report, which will be delivered to OCSWM. DAA will also prepare <br />a digital version (Adobe Acrobat or functional equivalent) of the report and provide it to OCSWM and to <br />NC- DEQ. <br /> <br />Task R00592-230N-04 <br />Groundwater Sampling Event 54-CA <br /> <br />DAA proposes to conduct corrective action groundwater sampling event 54 (event 54-CA) at the Orange <br />County Regional Landfill – North Facility during February, 2021. <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 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 />DAA will prepare one printed copy of the report, which will be delivered to OCSWM. DAA will also prepare <br />a digital version (Adobe Acrobat or functional equivalent) of the report and provide it to OCSWM and to <br />NC- DEQ. <br /> <br /> <br />DocuSign Envelope ID: C7A3140E-4A17-4E91-92BC-D87506B7FE8B