Laserfiche WebLink
Soil Sampling for Stockpiled Soil <br />' Soil samples were collected by advancing 2-inch diameter brass sample liners into the soil <br /> stockpile, after removing approximately 6 inches to 1 foot of surface material in the sample <br />' location One composite sample was collected per approximately 100 cubic yards of soil <br /> Soil samples for chemical analysis were retained in the brass liners, labeled, and capped with <br /> Teflon sheets and plastic end caps The samples were then sealed in zip-lock bags, placed on <br />' ice, and transported to the laboratory accompanied by the appropriate chain-of-custody <br /> documentation <br />' Laboratory Analysis for Soil Samples <br />' Soil samples were analyzed for the presence of TPHg, BTEX, and MtBE using EPA Methods <br /> 8015 (modified)/8020, and fuel oxygenates using EPA Method 8260A/B Selected samples <br /> were analyzed for lead using EPA Method 6010A <br />' Groundwater Sampling Procedures <br />' The sampling procedure for each well included measuring the water level and checking for <br /> the presence of separate-phase hydrocarbons (SPH), using either an electronic indicator and a <br /> clear TeflonO bailer or an oil-water interface probe Wells that had submerged screens were <br /> purged of approximately three casing volumes of water (or to dryness) using a centrifugal <br /> pump, gas displacement pump, or bailer The equipment and purging method used for the <br /> current sampling event were noted on the attached field data sheets During purging, <br />' temperature, pH, and electrical conductivity were monitored in order to document that these <br /> parameters were stable prior to collecting samples After purging, water levels were allowed <br /> to partially recover Groundwater samples (both purge and no purge) were collected using a <br />' TeflonO bailer, placed into appropriate EPA-approved containers, labeled, logged onto <br /> chain-of-custody documents, and transported on ice to a California state-certified laboratory <br />' Laboratory Procedures for Groundwater Samples <br />' Groundwater samples were analyzed for the presence of TPHg, BTEX, and MtBE using EPA <br /> Methods 8015 (modsfied)/8020, and fuel oxygenates using EPA Method 8260A The <br /> methods of analysis for the groundwater samples are documented in the certified laboratory <br />' analytical report The certified laboratory analytical report, chain-of-custody documentation, <br /> and field data sheets are presented as Attachment D <br /> 1 <br /> 1 <br /> 1 <br />