Laserfiche WebLink
Mr.Harlan Knoll Page 2 of 2 <br /> April 27, 1993 <br /> Soil Classification System. The field geologist will also note moisture content and any evidence <br /> of petroleum hydrocarbons (Le. soil staining and odor). Geologic logs for each borehole will <br /> be prepared under the direction of a California Registered Geologist. <br /> ,Soil.samples collected from each borehole will be analyzed by Sequoia Analytical, a California <br /> Department of Health Services (DHS) certified laboratory, for total purgeable petroleum <br /> hydrocarbons,(TPH-G) by U.S. Environmental Protection Agency (USEPA) Method 8015 and <br /> benzene, toluene, ethylbenzene, and xylenes (BTEX) by USEPA Method 8020. <br /> Drill cuttings will be temporarily stored on-site. .The soil will be placed on, and covered with, <br /> plastic sheets. A composite sample will be collected.from the stockpiled drillcuttings and <br /> analyzed for hydrocarbon content. Proper disposaflmethodswill be determined based upon the <br /> laboratory results. <br /> The boreholes will be backfilled with bentonite chips or-cement-bentonite grout to grade. If the <br /> boreholes cave.in a tremie pipe will be used to emplace the grout. <br /> Drilling permit applications are attached to this letter. If.you have any questions regarding this <br /> work plan, please call-Todd Ramsden or Paul Supple at'(51.0) 602-2333. <br /> Sincerely, <br /> ROUX ASSO IATES <br /> Paul Supple <br /> Senior Hydrogeologist <br /> Dean A. Richesin, C.E.G. <br /> Principal-in-Charge <br /> TR:ch <br /> Encls. <br /> E � <br /> j ROIACDoe #A159WOL1.3 <br />