ARCHIVED REPORTS_XR0003268 - Laserfiche WebLink

Home Browse Search

KLEINFELDER Task 2 - Sampling One sample will be collected from the turbine oil removed from the well A second sample will be collected from the well using a disposable bailer. Both samples will be collected in laboratory supplied bottles and submitted to a laboratory certified by the State of California Department of Toxic Substances Control (DTSC) for the proposed analyses Both samples will be submitted for- Extractable total petroleum hydrocarbons (EPA Method 8015M/3510), ► Purgeable total petroleum hydrocarbons (EPA Method 8015M/5030), ► Benzene, toluene, ethylbenzene, and xylenes (EPA Method 8020). The samples will be analyzed on a standard laboratory turnaround which typically requires five working days for the receipt of the data. Task 3 - Perforation of Well Casing The well casing will be perforated from the bottom of the surface grout seal (80 feet) to the bottom of the well casing (174 feet) Two columns of perforations will be shot through the casing approximately 180 degrees apart Each perforation will be approximately 3/4-inch diameter The perforation frequency for each column will be one perforation per 2 lineal feet Task 4 - Removal of Well Casing, Grout Seal, and Soil at Surface • In accordance with the State of California Department of Water Resources (DWR), Water Well Standards Bulletin 74-81 (page 55), a backhoe will be used to remove the well casing, grout seal, and soil around the well to a maximum depth of approximately 5 feet. The excavation will extend a minimum of 1-112 foot from the well in each direction (3 feet x 3 feet x 5 feet deep) The well casing and grout seal will be left for disposal with the existing construction debris on the site The soil will be stockpiled for use in the backfill Task 5 - Bottom Filler In accordance with DWR Bulletin 74-81 (page 57), the well will be backfilled with a non organic material (pea gravel) from the total depth of 196 feet to approximately 190 feet. The actual final gravel depth will be tagged, and an estimate of the volume of gravel used recorded, so that an estimate of the actual diameter of the bore-hole can be calculated Task 6 - Well Destruction In accordance with DWR Bulletin 74-81, Section 9, D and F, the well will be destroyed using a sand/cement slurry pumped through a tremie The slurry will be installed from the top of the gravel to approximately 1 foot above the bottom of the excavation • FWP-92-20 Page 2 of 4 Copynght 1992 Klemfelder, Inc