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W w 01 July 2008 AGE-NC Project No. 97-0301 Page 5 of 8 3.2, SOIL SAMPLING Soil samples will only be collected from soil boring MW- 13 at five-foot intervals, beginning at a depth of 10 feet bsg, utilizing a modified California split-spoon sampler and brass sleeves. Soil samples will not be collected from soil borings VW- 1 , V W-2 or VW-3 . At soil boring MW- 13 , the sampler will be driven by dropping a 140-pound weight from a height of 30 inches (blow counts). The blow counts required to drive the sampler over each 64nch interval will be recorded on boring logs. Upon soil sample retrieval, the second brass sleeve will be removed from the sampler. The ends of the brass sleeve will be immediately covered with Teflon or aluminum sheets, sealed with plastic end caps, secured with tape and immediately placed in a chilled container for transportation under chain-of-custody to a state-certified laboratory. Each sample sleeve will be labeled with the boring location, sample depth, sample time, sampling date and sampler's initials. During sampling activities, sample duplicates will be monitored for the presence of organic vapor using an OVM and will be visually described on boring logs using the Unified Soil Classification System (USCS) . All sampling tools and brass sleeves used for sample collection will be thoroughly rinsed with clean water after washing with a solution of Alconox. All hollow stem augers will be steam-cleaned prior to advancement in each borehole. Soil samples will be collected at five-foot intervals, be ' g at a depth of 10 feet bsg for logging purposes. Selected soil samples from MW- 13 sift Abe analyzed by a State of California Department of Public Health (CDPH)-certified laboratory for the following constituents: • TPH-g, TPH-d and TPH-k in accordance with EPA Method 8015 Modified; • BTEX, MTBE, TAME, DIPE and 1 ,2-DCA by EPA Method 8260 Modified. IVIb Laboratory reports for soil analysis, testing methods, laboratory quality assurance/quality control (QA/QC) reports, and sample chain of custody documentation will be presented in a report with findings and recommendations. 3 .3 . GROUNDWATER MONITORING WELL COMPLETION Following drilling of the proposed pilot boring, 2-inch diameter schedule 40 PVC 0.020-inch perforated well screen and 2-inch diameter blank well casing will be utilized to single-complete well MW- 13 . A 20-foot section of well screen will be installed as a shallow-screened well, extending approximately 15 feet below and 5 feet above the top of the ground water table. After installing the well casing, filter pack material consisting of pre-washed #2/12 Lonestar sand will be added from the bottom of the borehole to approximately two feet above the screened interval. Advanced GeoEnvironmental, Inc.