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' 16 October 2014 AGE Project No. 13-2675 ' Page 4 of 9 ' Leak tests were performed on each manifold assembly by attaching and securing the sample and purge canisters to the manifold and opening the valve on the purge canister and the manifold. The leak test was performed for approximately 10 minutes on each ' assembly. Each soil-vapor boring location was isolated from ambient air by enclosing the borehole, ' tubing and manifold/canister assembly in a plastic shroud. Isopropyl alcohol (IPA) as a liquid was placed in a stainless steel bowl within the plastic structure and allowed to volatilize into the air enclosed within the plastic structure surrounding the borehole, ttubing and manifold/canister assembly. After achieving a successful leak test and allowing for 120 minutes of equilibration time, ' the purge canister valve was opened for approximately 4 minutes to allow for three calculated volumes of air to be purged. The purge canister vacuum gauge was monitored to ensure a proper decrease of vacuum ensuring flow and purging. The ' purge volume was determined by calculating the internal volume of the tubing and the volume of sampling void (created by installing temporary soil-vapor well). ' Upon achieving the targeted purge volume, the purge canister valve was closed and the sample canister valve was opened. The initial pressure and time was recorded. The sample canister valve was closed after reaching -5 inches Hg in; the final pressure and ' time were recorded. The sampling port on the sampling canister was then capped with a brass end-cap and the canister was placed in cool dry container (room temperature). ' SOIL SAMPLE COLLECTION ' Soil samples were collected at discreet five-foot intervals, beginning at 5 feet bsg and extending to 35 feet bsg in boring B7 using a 1.45-inch diameter Geoprobe soil sampling assembly loaded with one two-foot long acetate sleeve. After sample ' collection, a portion of the acetate sleeve was separated and the ends were covered with Teflon sheets, capped and sealed with tape. Sample sleeves were labeled with soil boring location, depth, time, date and sampler's initials and then placed in a chilled ' container. ' Soil sample duplicates were extruded into plastic bags and field-screened for the presence of organic vapors using an organic vapor meter (OVM), equipped with a photo-ionization detector (PID). Additionally, the soil was visually classified in ' accordance with the Unified Soil Classification System (USCS). Advanced GcoEnvironmental,Inc. 1