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21 July 2015 AGE Project No. 14-3154 Page 11 of 15 sampling tools to specified depths. Shallow soil sampling will be advanced with hand auger tooling. SOIL SAMPLING — SOIL BORINGS Soil samples will be collected from borings at discreet five-foot intervals beginning at fifteen feet bsg using a 1.45 inch Geoprobe soil sampling assembly loaded with one two-foot long acetate sleeve. Shallow soil sampling will be conducted at one foot below surface grade, with a soil sampling slide-hammer, loaded with a pre-cleaned steel sleeve. Soil samples from borings will be collected to a total depth of 25 feet bsg or until field evidence signifies the absence of impact (no previous impact was detected). Upon sample retrieval, a portion of the acetate sleeve will be separated and the sleeve ends 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. Each sample sleeve 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 OVM, equipped with PID pre-calibrated to isobutylene. GRAB GROUNDWATER SAMPLING — SOIL BORINGS A grab groundwater sample will be collected from soil borings advanced to approximately 25 feet bsg. For collection of a grab groundwater sample, a Geoprobe (or similar) push-driven water sampling device will be advanced four feet into the water- bearing zone or a temporary PVC casing will be installed inside the boring trace to approximately 25 feet bsg. Grab groundwater samples will be collected using a Geoprobe water sampling assembly fitted with a pre-cleaned, one-inch diameter 0.01- slotted temporary well screen. Each groundwater sample will be extracted by dedicated disposable polyethylene tubing through the hollow center of the push rods into the screen section. Samples will be analyzed for TPH-ranges, VOCs, SVOCs, PCBs, PAHs metals, dioxin and furan will be collected into laboratory-supplied, non-preserved 40-ml Volatile Organic Analysis (VOA) vials, 1-liter Amber bottles or plastic containers. Grab samples collected from the furnace basement will be collected in the same suite of chemical analysis containers. 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. Each sample container will be labeled with sample designation, time, date and sampler's initials. Advanced GeoEnvironmental,Inc.