Background Soil Assessment Sample Clauses

Background Soil Assessment. County and its A&M Contractor will identify regions with potentially differing soil types within the footprint of the Incident. The A&M Contractor shall also review geologic maps and look for signs of anthropogenic disruptions such as mining operations, disposal sites, contamination from previous disasters, other such activities that could have an impact on the background soils sampling locations as well as on the confirmation soil sampling that will take place after the debris has been removed from program properties. A&M Contractor, with approval from County, shall determine if levels above clean-up goals are the result of the incident fire ash and debris or from preexisting conditions. Soil samples in the vicinity but not in the ash impacted area will be collected and analyzed to establish the natural or anthropogenic occurring metal concentrations around the Incident. A California-certified laboratory will analyze these samples for California Code of Regulations (CCR) Title 22 metals. Samples will be collected. These samples will also be analyzed for moisture content which the A&M Contractor will use to correct the concentration of the metals to determine dry metals concentrations from analytical results. In addition, if directed by the County’s OSC, baseline assessment samples shall be taken at truck staging areas and equipment yards. These samples shall be analyzed for CCR, Title 22 metals, Total Recovered Petroleum Hydrocarbons (TRPH), benzene, toluene, ethylbenzene, and xylene (BTEX) analysis by a California-certified laboratory. Results from these samples will be used to establish a baseline, and additional samples will be collected upon demobilizing to ensure no residual material or hydrocarbon spill was left behind. The SDRS Contractor will be responsible for removing contaminated soils contributed by its operation in these staging areas, as verified by the A&M Contractor following appropriate predetermined soil sampling and analysis protocols.