ARCHIVED REPORTS_XR0005739 - Laserfiche WebLink

Home Browse Search

• location One composite sample was collected per approximately 100 cubic yards of soil Soil samples for chemical analysis were retained in the brass liners, labeled, and capped with Teflon sheets and plastic end caps The samples were then sealed in zip-lock bags, placed on ice, and transported to the laboratory accompanied by the appropriate chain-of-custody documentation Laboratory Analysis for Soil Samples Soil samples were analyzed for the presence of TPHg, BTEX, and TPHd by the DHS/LUFT Method, and fuel oxygenates (MtBE, TAME, DIPE, ELBE, TBA, 1,2-DCA, and EDB) using EPA Method 8260B Samples collected from stockpiled soil were analyzed for the presence of TPHg and BTEX by the DHS/LUFT Method, and for total lead using EPA Method 6010B The methods of analysis for the soil samples are documented in the certified laboratory analytical report The certified laboratory analytical reports and chain-of-custody documentation are presented as Attachment E Groundwater Sampling Procedures The sampling procedure for each well included measuring the water level and checking for the presence of separate-phase hydrocarbons (SPH), using either an electronic indicator and a clear Teflon® bailer or an oil-water interface probe Wells were purged of approximately three casing volumes of water (or to dryness) using a centrifugal pump, gas displacement pump, or bailer The equipment and purging method used for the current sampling event were noted on the attached field data sheets During purging, temperature, pH, and electrical conductivity were monitored in order to document that these parameters were stable prior to collecting samples After purging, water levels were allowed to partially recover Groundwater samples were collected using a Teflon® bailer, placed into appropriate EPA- approved containers, labeled, logged onto chain-of-custody documents, and transported on ice to a California state-certified laboratory Laboratory Procedures for Groundwater Samples Groundwater samples were analyzed for the presence of TPHg, BTEX, and MtBE using the DHS/LUFT Method, and fuel oxygenates (MtBE, TAME, DIPE, EtBE, TBA, 1,2-DCA, EDB, and ethanol) using EPA Method 8260B The methods of analysis for the groundwater samples are documented in the certified laboratory analytical report The certified laboratory analytical report and chain-of-custody documentation are presented as Attachment G Groundwater sampling field data sheets are included as Attachment H