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' EEC#51462-2 ilniFirti Stockton _ December 17,2003 and public safety as a whole The impacted soil encompasses an area approximately SO feet by 40 feet wide and extends to a depth of approximately one- to two- inches below grade ' • When excavation limits have been reached, EEC will collect confirmation soil samples At a minimum, these samples will be collected per the direction of the SJCEHD Because the configuration and final excavation limits are not known at this time, EEC can only provide general guidelines by which confirmation testing will be conducted (see below) • Transport the removed soil to an appropriate landfill for disposal ' • Submit a final report to SJCEHD presenting the findings of the assessment and remediation activities ' Confirmation samples will be collected as follows ' • Notify the SJCEHD prior to collecting any confirmation samples, so that SJCEHD can be present for sampling, if necessary • All samples will be collected in brass sleeves or laboratory grade sample jars Samples will be labeled with the date, time sampled, project name, and unique sample identification number Samples were placed on iced storage for transport to a State of California laboratory certified to perform the requested analysis, utilizing proper Chain of Custody protocol • Sample locations — Upon excavation and removal of the hydrocarbon impacted soil, confirmation samples will be collected by dividing the formerly oil-impacted area into a grid pattern Each grid will have dimensions of roughly 10 x 10 feet, for a total of 20 grids Soil samples will be randomly collected from one location in every second grid ' (10 samples total) • Stockpile Soil - One sample of the stockpiled soil will be collected for disposal ' characterization • Laboratory Methods — All samples collected during excavation and confirmation testing ' will be analyzed for total petroleum hydrocarbon (TPH) by Environmental Protection Agency Method (EPA) 8015 for carbon chain and for Volatile Organic Compounds by EPA method 8260B ' UST Related Assessment and Remediation (if necessary) ' Should hydrocarbon-impacted soil be discovered during the removal of the oil tank discussed above, remediation will be conducted by excavation of the impacted soil Remediation will be conducted by utilizing a backhoe, excavator, or similar equipment to remove all visible evidence ' of hydrocarbon impact and when field instruments such as a photo-ionization detector indicate no evidence of hydrocarbon impact Upon removal of the impacted soil, confirmation soil samples will be collected under the guidance of the SJCEHD Soil samples will be analyzed for the constituents of concern detected during the tank removal The work scope proposed in this document is intended to provide a rapid response to minimize any additional impact caused by the oil release in accordance with all regulations and i