Orange County NC Website
Browse       Search
DocuSign Envelope ID: F6E5B15D-6611-4749-BBCF-56530F14FFBD <br /> Work Plan&Cost Estimate for Remedial Investigation—Monitor Well Installations <br /> Hillsborough Dump <br /> ID No, NONCDC000483 <br /> �r <br /> Task Orders 483DP-7,8 and 9 <br /> S&ME Project No.4305-17-061 <br /> annulus,around the well screen up to at least one foot above the well screen. A one-foot thick bentonite seal will <br /> be installed above the sand pack. Grout will be placed in the annular space between the outermost casing and <br /> the borehole wall from the land surface to the top of the bentonite seal. The wells will be developed with a pump <br /> or bailer until turbidity measurements are below 10 NTU or representative of background conditions. GPS <br /> coordinates will be collected at each installed monitor well location. <br /> Investigative Derived Waste <br /> Investigative derived waste(IDW)extracted from a boring will be placed back in the boring unless groundwater <br /> was encountered. Per the OCHD Rules,grout will be used to backfiII borings that intersect the water table. <br /> Impacted materials, not used as fill,will be drummed. Drums containing IDW will be sealed and labeled and <br /> placed on a wooden pallet within a self-standing temporary chain-link fence near the borings. Three corners of <br /> the fence will be secured with hardware. The fourth corner will be secured with chain and a padlock to allow <br /> controlled access to the fenced area. <br /> If needed,up to four composite samples of drummed/stored IDW will be collected for laboratory analysis and <br /> characterization. See the attached laboratory fees spreadsheet for the proposed laboratory analyses. If it is <br /> determined that the drummed IDW does not require off-site disposal,the IDW will be spread within the waste <br /> disposal area. If sampling results indicate the IDW is hazardous,S&ME will subcontract a waste hauler to dispose <br /> the drums off-site within 90 days after field activities are concluded. Fencing and pallets will also be removed <br /> from the site. The cost for off-site disposal of IDW is not included in this work plan/cost estimate. if off-site <br /> disposal of the IDW is required,S&ME will prepare a proposal for subcontracted services to dispose of the drums <br /> and submit it to the Unit for review and approval. <br /> Subtask B Project Management, Coordination & Support <br /> Project Management, Coordination and Support services include: <br /> Tasks and deliverables required prior to commencing field services: <br /> o Procurement and coordination of subcontracts. <br /> o Coordinate with drillers to ensure that well supplies and decontamination materials are prepared. <br /> Pre-loading the GPS unit with the proposed monitor well location names and coordinates. <br /> a Preparing and submitting well construction permits to OCHD. <br /> Provide project management and technical support to field staff, <br /> Field data quality review. <br /> Provide project management and communication with OCHD, NCDEQ and the County. <br /> Task 483DP-9 Compile Report <br /> S&ME will compile a report that includes the findings of the items listed above for the scope of services. The <br /> following sections and information will be included in the report: <br /> Explanation of services performed and the findings. <br /> A section concerning any variations from the work plan or the SOPS. <br /> March 5,2019 3 <br />