ARCHIVED REPORTS XR0000041 - Laserfiche WebLink

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1. 1 2 0 SCOPE OF WORK ' The objectives of the investigation were to further define the extent of impacted soil and groundwater, and establish a groundwater monitoring capability at the site To achieve these objectives, three on-site groundwater monitoring wells were installed, surveyed, monitored and sampled ' 21 Planning and Permitting Prior to initiating fieldwork, a site-specific health and safety plan was prepared according to 29 CFR 1910 120 The health and safety plan included safety procedures for work to be performed, chemical hazard information, site safety officers, and a medical emergency location To perform the drilling scope of work, monitoring well permit (SR #0031328) was obtained from EHD Since all of the drilling was conducted on-site, neither off-site access agreements nor encroachment permits were required At least two working days prior to field work, Ramage Environmental notified EHD so that any inspections could be scheduled Underground Service Alert was also notified to complete utility clearance inspections (USA Ticket#429347) 22 Groundwater Monitoring Well Installations On October 21 and 22, 2002, under the supervision of Ramage Environmental, Mitchell Drilling (C-57 License#672617) installed three on-site groundwater monitoring wells (MW-1, MW-2 and ' MW-3) with a CME-75 drilling rig and 8-inch diameter hollow-stem augers Monitoring well MW-1 was located near the south end of Tank 1 and near a former dispenser island Monitoring well MW-2 was located near the south end of the former 20,000 gallon tet fuel UST (CA-1) Monitoring ' well MW-3 was located approximately 40 feet northeast of the previous soil boring SB-4 The monitoring well locations are shown on Figure 3 ' 2 2 1 Monitoring Well Construction, Development and Elevation Survey Mitchell Drilling installed all three wells to total depths of approximately 65 feet bgs All three wells were constructed with 20 feet of two-inch diameter, Schedule 40, flush-threaded and machine- slotted (0 020-inch) polyvinyl chloride (PVC) well screen Blank PVC casings were threaded into the tops of the well screens and extended to the surface 7 1