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r RECEIVED 11 April 2016 AGE Project No. 16-3650 JUN! 30 6 2016 Page 4 of 4 ENVIRONMENTAL I, ,A,!_THrtT � IT advanced to total depth. A continuous boring log will be generated utilizing the Hogentogler Co. CPT computer program. The Hogentogler Co. computer program will utilize the CPT Soil Behavior Classification System (Robertson, P.K., Campanella, R.G, Gillespie, D. and Greig, J., 1986), to generate a general lithology type and display on a CPT boring log. Rinseate generated during drilling activities will be containerized in properly labeled Department of Transportation (DOT)-approved 55-gallon drums, and stored on-site in an area lacking public access. Disposal alternatives will be evaluated at a later date based on laboratory results of the rinseate. 3.2. CPT GROUNDWATER SAMPLING Multiple 13/4-inch diameter soil borings will be located adjacent to each CPT boring (P-11, P-12, P-13, P-14) to acquire independent grab groundwater samples in each targeted zone. Based on CPT findings, discrete grab groundwater samples will be collected in significant intervals of porous and permeable strata. The depth of sampling will likely adhere to the previous depths, as depicted in Table 1. A Hydro-Punch sample tool will be pushed into the specified zone, then withdrawn approximately three feet to expose an inlet screen. The interior of the sampling tool fills with water and a 1-inch outer diameter stainless steel bailer will be lowered and utilized to extract a groundwater sample. Following sample collection, the samples will be transferred to laboratory- supplied containers, properly labeled and placed in a chilled container to be transported under chain of custody to a DPH-certified laboratory for analysis. All rinseate generated during drilling activities will be containerized in properly labeled DOT-approved 55-gallon drums, and stored on-site in an area lacking public access. 3.3. EQUIPMENT DECONTAMINATION All sampling tools used for sample collection will be thoroughly rinsed with clean water after being washed with a solution of Alconox. All down-hole drilling and sampling equipment will be pressure washed prior to starting each boring. 3.4. BORING DESTRUCTION All soil borings will be permanently sealed to prevent vertical migration of potential contaminants. At the completion of CPT and/or groundwater sampling activities, all soil borings will be backfilled by inserting hollow steel rods to the total depth of each boring, and backfilling with a portland cement grout mix; the EHD will be notified at least 48 hours in advance of field work and be given the opportunity to inspect the grout mix prior to backfilling activities. Advanced GeoCnvironmental,Inc.