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i F1 S ECOR ATTACHMENT G f FIELD AND LABORATORY PROCEDURES Exploratory Drilling F Vertical delineation soil borings were advanced using narrow diameter, direct push technology to approximately 70 feet below ground surface. Barings were logged by a F1 SECOR International Incorporated geologist using the Unified Soil Classification System and standard geologic techniques. Soil samples for logging will be collected continuously. Soil samples for chemical analysis were retained in acetate tubing, capped with Teflon squares and plastic end caps, and sealed in clean zip-lock bags. Groundwater samples were F1 collected using a hydropunch sampler and clean dedicated acetate tubing attached to a peristaltic pump. The samples were placed on ice for transport to the laboratory accompanied by chain-of-custody documentation. Down-hole drilling and sampling I F equipment was steam-cleaned prior to and following the completion of each soil boring. Down-hole sampling equipment was washed in a tri-sodium phosphate or alconox solution a between samples. Borings for wells were drilled using 8-inch hollow-stem auger drilling equipment. No soil samples were collected from the borings. F", Groundwater Monitoring Well Installation and Development Each groundwater monitoring well was completed by installing a 2-inch diameter, flush- r- threaded, schedule 40 PVC casing with 0.020-inch factory-slotted screens. Approximately 20 feet of screen was used to construct the monitoring wells. A #3 sand pack was placed in the annular space across the screened interval, extending approximately 2-feet above the top of the screen. A 2-foot bentonite transition seal was placed atop the sand pack, followed by a neat cement seal, extending from the top of the bentonite transition seal to the ground surface. The boring logs show well construction details. The development procedure for each well consisted of swabbing the screen interval and ` pumping or bailing approximately ten casing volumes of water from the wells. The well development sheets are included in Appendix F. Soil Cuttings and Purge Water Soil cuttings generated during drilling operations and water generated during equipment cleaning and sampling were stored onsite in 55-gallon drums onsite pending characterization. The soil and water will be removed from the site by a licensed disposal contractor and transported to an appropriate disposal or treatment facility for proper disposal. Laboratory Procedure Soil samples exhibiting positive PID detections or a minimum of three samples from each boring (including the deepest sample) were analyzed for TPHg, BTEX, and fuel oxygenates F: (MtBE, EtBE, DIPS, TAME, TBA, EDB, 1,2-DCA, and ethanol) by EPA Method 8260B and F ' for total lead using EPA method 60106. L1{ F'. r •