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DocuSign Envelope ID:730BOEA2-D934-4504-B42A-928DAE22F3FB <br /> Section Seven 39 <br /> Approach and Understanding <br /> Assessment of Underground Injection Program Activities. On behalf of OCSWM, Draper Aden Associates <br /> submitted to NCDEQ- Division of Water Quality-Aquifer Protection Section an assessment of the underground <br /> injection program activities. This submittal was in partial fulfillment of renewing the facility's Underground <br /> Injection Permit (W10500293). <br /> Semiannual Groundwater Monitoring Program. Draper Aden Associates conducts semiannual groundwater <br /> sampling at the Orange County Regional Landfill - North Facility. DAA coordinates field and laboratory <br /> services,obtains groundwater samples from compliance monitoring wells, nature and extent monitoring wells, <br /> remediation injection program wells,and surface water locations, reviews sampling documentation received <br /> from groundwater sampling personnel,chemically analyzes groundwater samples (ENCO),validates analytical <br /> data provided by the contracted laboratory(Level 2), updates historical summary tables, and prepare a report <br /> suitable for direct submission to NCDEQ. <br /> Quarterly Corrective Action Monitoring Program. Draper Aden Associates also conducts quarterly <br /> groundwater sampling at the Orange County Regional Landfill - North Facility, in accordance with the approved <br /> selected remedy. DAA coordinates field and laboratory services,obtains groundwater samples from two <br /> compliance wells (MW-21 S, MW-21 D) and two nature-and-extent wells (MW-23, MW-24) for the following <br /> constituents,as specified in the Underground Injection Permit: carbon dioxide, chloride, manganese, mercury, <br /> potassium,volatile organic compounds listed in NCDEQ Appendix I, reviews sampling documentation received <br /> from groundwater sampling personnel,chemically analyzes groundwater samples (ENCO),validates analytical <br /> data provided by the contracted laboratory(Level 2), updates historical summary tables, and prepare a report <br /> suitable for direct submission to NCDEQ. <br /> Surface Water Monitoring Program. Draper Aden Associates conducts surface water sampling at the Orange <br /> County Regional Landfill. DAA coordinates field and laboratory services,obtains surface water samples, reviews <br /> sampling documentation received from surface water sampling personnel, chemically analyzes surface water <br /> samples (ENCO),validates analytical data provided by the contracted laboratory (Level 2), updates surface water <br /> summary tables, and prepare a report suitable for direct submission to NCDEQ. <br /> Orange County Regional Landfill: South Facility <br /> Semiannual Groundwater Monitoring Program. Draper Aden Associates conducts semiannual groundwater <br /> sampling at the Orange County Regional Landfill - South Facility. DAA coordinates field and laboratory services, <br /> obtains groundwater samples from compliance monitoring wells, reviews sampling documentation received <br /> from groundwater sampling personnel,chemically analyzes groundwater samples (ENCO),validates analytical <br /> data provided by the contracted laboratory(Level 2), updates historical summary tables, and prepare a report <br /> suitable for direct submission to NCDEQ. <br /> Leachate Monitoring Program. Draper Aden Associates conducts leachate sampling at the Orange County <br /> Regional Landfill. DAA coordinates field and laboratory services,obtains leachate samples, reviews sampling <br /> documentation received from leachate sampling personnel, chemically analyzes leachate samples (ENCO), <br /> Irki <br />