ARCHIVED REPORTS XR0003037 - Laserfiche WebLink

Home Browse Search

Chevron Products Company 16 Fortner Chevron service Station #9-5775, 301 west Kettleman Lane, Lodi, Califomia lute 5, 2001 Given the assumption that increasing the flow rate of the existing treatment system to 30 gpm is . feasible, Chevron is currently evaluating various extraction strategies to provide adequate containment of the hydrocarbon plume These strategies include an angled extraction well beneath Kettleman Lane and the installation of extraction wells south of Kettleman Lane 63.1 Angled Extraction Well Installation of an angled extraction well on the comer of Kettleman Lane and South Lee Avenue is expected to increase the radius of capture of the GWE significantly The well would be constructed at an angle of 30° to 45°, extending beneath Kettleman Lane While installation of an angled extraction well would greatly facilitate hydraulic capture, significant technical challenges may be encountered during installation of this well The primary challenge involves installing the well in a manner that does not allow significant directional changes to occur, which may prevent the installation of a pump. This challenge may be overcome by the installation of the relatively small pump (i a 3" or 4") in an oversize well (i a 6" or 8') well, however success is not guaranteed SECOR estimates a total cost of $45,000 for the installation of the well and the associated trenching and plumbing 632 Extraction Wells South of Kettleman Lane The final method of enhancing groundwater extraction in the vicinity of the site involves installation of extraction wells south of Kettleman Lane Installation of these wells would require either surface or subsurface trenching across Kettleman Lane to lay extraction piping and associated electrical conduit Permitting challenges associated with this option are expected to be significant Operation of extraction wells south of Kettleman Lane would extend the radius of capture to include all known points of impact, Well 12, and the adjacent Shell service station One drawback to operation of such a system is that existing contamination beneath Kettleman Lane may actually be drawn from the former Chevron station toward the municipal well Furthermore, contamination from the Shell service station may be drawn into the extraction system Nevertheless, Chevron views this as a feasible remedial approach to provide adequate hydrocarbon plume containment SECOR has approximated the total cost for the installation of the two extraction wells and the associated trenching and plumbing to be $85,000 Remedial options, estimated costs, feasibility and associated comments are presented in tabular fashion below 11Chevron1957751ParFrp19-5775PARFRP2 doe