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06 September 2013 AGE Project No. 13-2914 Page 3 of 4 analysis of soil and soil-vapor samples, equipment decontamination and sample handling are presented below. SOIL SAMPLING Soil samples will be collected from the soil borings at one foot bsg and five feet bsg using a hand auger. Soil will be hand-packed into two-inch by six-inch stainless steel sample sleeves. Upon sample collection, sample sleeves will be covered with Teflon sheets, capped and sealed with tape. Appropriately sealed and labeled samples will be placed in a chilled container under ice and transported under chain-of-custody procedure to a CDPH-certified laboratory. Samples will be analyzed for VOCs by EPA Method 82606. Each sample will be labeled with boring designation, depth, time, date and sampler's initials. Soils encountered in the borings will be visually classified by AGE personnel in accordance with the Unified Soil Classification System (USCS).Additionally, soil samples will be field-screened for presence of volatile organic compounds using an organic vapor meter (OVM), equipped with photo- ionization detector (PID) pre-calibrated to isobutylene. SOIL VAPOR SAMPLING For collection of soil vapor samples a small diameter steel probe sampler with retractable screened vapor point will be driven into the subsurface with a mechanical hand-held hammer(rotohammer). The sampling point will be advanced to a depth of 3.5 feet bsg and then retracted approximately 3 to 6 inches in order to expose the screen from which the soil-vapor could be extracted. Single use, 1/4-inch disposable polyethylene tubing will then be attached through the rods to the sampling point to a tubing adapter equipped with an O-ring to ensure a vacuum-tight seal. Each sampling point will be purged for a minimum of 2 minutes prior to obtaining a sample in 1 liter tedlar bags. Once the purging is complete a sample will be collected using a peristaltic pump and low-flow sampling techniques (200 milliliters per minute). After sample collection the tedlar bag will be labeled and stored in a dry container. Hydrated bentonite will be placed around the steel probe sampler at ground surface to prevent ambient air intrusion. A minimum of 30 minutes equilibrium time will be allowed at each soil-vapor boring location prior to purging and sample collection. Soil vapors purged through the pump will also be field evaluated using a PID. Soil vapor samples will be transported under chain-of-custody procedure to a CDPH- AdvancedGeoEncironmental,Inc.