WORK PLANS - Laserfiche WebLink

Home Browse Search

Site-Specific HASP will be reviewed by field staff and contractors before beginning field operations at the site. 3.2 Permitting Cardno ATC will obtain any necessary encroachment permits from the City of Stockton and Port of Stockton and well destruction permits for on-site and off-site well destructions from the San Joaquin County Department of Environmental Health (SCDEH) prior to beginning work. Well destruction activities will be observed and approved by a SCDEH representative, and post- destruction surface finishing of off-site wells will be approved by a City of Stockton and/or Port of Stockton representative if required. 3.3 Subsurface Utility Clearance Prior to field activities, Cardno ATC will mark all proposed drilling locations in accordance with the Underground Service Alert (USA) guidelines, and notify USA North of upcoming subsurface activities so existing underground utilities in the area of proposed work can be located and avoided. Cardno ATC will also contract a private utility locator to confirm the locations of the underground utilities in the vicinity of the work and attempt to identify any other subsurface conflicts with the proposed work locations. 3.4 Well Destruction Activities Destruction of the 19 monitoring wells, 6 piezometers, and 9 injection wells at the site will be completed by over-drilling each well with augers of the same diameter or larger as were used to install each well. Over-drilling will employ a centering rod to keep the auger on the same vertical path as the installed well, and will be completed to the same depth as the well being removed. Upon removal of all installed well materials, each boring will be grouted to within a foot of the ground surface, and the open boring backfilled with sand or bentonite to just below ground surface, per SCDEH guidelines. The surface will be finished with cement or asphalt to match the surrounding grade at the request of the City or Port of Stockton. 3.5 Waste Disposal Investigation derived waste (IDW) including soil cuttings, groundwater, and decontamination water generated during well destruction activities will be contained in DOT approved 55-gallon drums or a roll-off bin and temporarily stored on site. The IDW will be profiled and scheduled for removal and disposal by a licensed waste disposal contractor as soon as possible. 4.0 LIMITATIONS AND CERTIFICATIONS This report was prepared in accordance with the scope of work outlined in Cardno ATC's contract and with generally accepted professional engineering and environmental consulting practices existing at the time this report was prepared and applicable to the location of the site. It was prepared for the exclusive use of Philips 66 Company, for the express purpose stated above. Any reuse of this report for a different purpose or by others not identified above shall be at the user's sole risk without liability to Cardno ATC. To the extent that this report is based on information provided to Cardno ATC by third parties, Cardno ATC may have made efforts to verify this third party information, but Cardno ATC cannot guarantee the completeness or accuracy of this information. The opinions expressed and data collected are based on the