WORK PLANS - Laserfiche WebLink

Home Browse Search

C A M B R I A Mr. Jeffrey Wong March 30, 2005 were for industrial use, one was for municipal use, and two wells were of unknown use. The closest well is a municipal well located approximately 1,100 feet northeast (cross-gradient) of the Shell-branded station. The approximate well locations are plotted on Figure 1. No additional wells were identified by Cambria's 500-foot door-to-door survey. Two surface water bodies were also identified within the study area. Unnamed ponds are located at the San Joaquin Storm Water Facility, which is located approximately 250 feet north of the site, and a diverting canal is approximately 1,900 feet southwest of the site. The surface water bodies are also shown on Figure 1. Complete survey results are included in Cambria's February 13, 2002 Fourth Quarter 2001 Groundwater Monitoring/Site Investigation Report and Receptor Survey. Groundwater Monitoring Program: There are currently four groundwater monitoring wells (MW-1 through MW-4)-onsite that are sampled quarterly. Historically, groundwater flow beneath the site is predominantly northerly. During the fourth quarter 2004 sampling event, all site wells contained insufficient water to sample. Work Tasks Site Safety Plan: Cambria will prepare a Site Safety Plan for field work. Over-excavation: Cambria proposes to conduct over-excavation in the dispenser and piping areas shown on Figure 2, based on preliminary analytical data following the UST, dispenser, and piping removal. Cambria will attempt to remove impacted soil in these areas to the extent that is feasible. The final extent of over-excavation will be based on field observations and photo-ionization detector measurements. Physical constraints, such as the canopy supports, may limit the extent of over-excavation. Soil Sampling and Chemical Analyses: Soil samples will be collected at the limits of the excavation to document soil conditions. Soil samples will be analyzed for TPHg, BTEX, and MTBE by EPA Method 8260B. Cambria will request 24-hour turn-around time for the laboratory results. Soil Disposal: As discussed with SJCEHD, up to 150 cubic yards of soil will be directly loaded into trucks for transportation to Allied Waste's Forward Landfill (Forward)in Manteca, California under an existing profile. Cambria does not anticipate that more than 150 cubic yards of soil will be generated during the course of over-excavation activities. If it is, the soil will be stockpiled onsite and profiled for disposal at Forward. 3