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DocuSign Envelope ID: FC9986C3-F179-4A3D-BACO-D8CA9F8B93A7 <br /> Proposal for Additional Remedial Investigation <br /> Aow Hillsborough Dump <br /> ID No. NONCD0000483 <br /> Task Orders 483DP-19 thru 25 <br /> VENOM <br /> S&ME Project No.4305-17-061G <br /> Field logs will be maintained and will include at a minimum: <br /> Names of persons conducting the evaluation; <br /> Brief description of weather conditions(possible impacts on data:windy, nearby exhaust from vehicles, <br /> etc.); <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 /> Task 483DP-23 Installation, Sampling and Analyses of New Groundwater Wells and <br /> Landfill Gas Probes <br /> See Figure 1 for the proposed installation locations of 9 new groundwater monitor wells and, 12 new landfill gas <br /> probes. Some of the locations have been moved from the locations presented in the November 5, 2021 NCDEQ <br /> letter to locate the new wells and probes on property owned or controlled by the County.The moved locations <br /> are in the general vicinity of NCDEQ's requested locations and will meet the intention of delineation of impacted <br /> groundwater and soil gas. <br /> The following activities and tasks will be completed for the installation and sampling of new monitor wells and <br /> landfill gas probes: <br /> Prior to conducting field work, S&ME will notify the North Carolina One-Call Center(811)to locate <br /> underground utilities. In addition, S&ME will retain the services of a private underground utility locating <br /> company to locate underground utilities and clear boring locations. S&ME proposes to use a private <br /> utility locator for the following reasons: <br /> The One-Call Center coordinates utility mark-outs for its member companies. Not all utility <br /> owners/operators are members of the One-Call Center. <br /> The One-Call Center utility mark-outs are for known utility locations that are marked out in easements <br /> and rights-of-way.The mark-outs do not typically go onto private property from the easement or <br /> right-of-way areas. <br /> Private utility locators will enhance the One-Call center mark-outs by continuing to extend and show <br /> the lines marked by the One-Call Center mark out into the project area (if present). Private utility <br /> locators may also use additional equipment(other than just magnetic scans) like ground penetrating <br /> radar to locate underground utilities. Private utility locators will go to each proposed drilling location <br /> and mark utilities or"clear" the drilling locations. <br /> S&ME will hand-clear areas for access to the proposed soil boring locations. <br /> March 10,2022 6 <br />