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25 July 1996 AGE-NC Project No. 95-0112 Page 2 of 3 Each probing will be advanced utilizing a van-mounted Geoprobe 5400 probing unit equipped with 1.125-inch diameter probe rods. Discrete soil samples will be collected at five-foot intervals beginning at a depth of 15 or 20 feet bsg using a 1.5-inch Geoprobe sampling assembly and brass sleeves. Upon sample retrieval, the second brass sleeve will be removed from the sampler. The ends of the sleeve will be immediately covered with Teflon sheets, sealed with plastic end caps, secured with tape and immediately placed in a chilled container for transportation to a State-certified laboratory. Each sample sleeve will be labeled with the following: boring location, depth.. rime, date and sampler's initials. 3.2. EQUIPMENT DECONTAMINATION 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 probe rods are washed prior to advancement. 3.3. LABORATORY ANALYSIS Selected soil samples will be analyzed for total petroleum hydrocarbons quantified as gasoline(TPH- g) volatile aromatics (benzene. toluene, ethyl benzene, and xylenes: BTE&X) and methyl tertiary butyl ether (MTBE) in accordance with EPA methods 80151n and 8020. Laboratory reports of soil analyses, testing methods, laboratory quality assurance/quality control (QA/QC)reports, and sample chain of custody documentation will be presented in a report with the findings and recommendations. 4.0. PROCEDURES 4.1. PROBING AND SAMPLING The following procedures will be performed for the advancement of each probing: 1. Notify the PHS-EHD at least 48 hours prior to the commencement of any work. 2. Advanced each soil probing at the site to a depth of approximately 55 feet bsg using a van- mounted Geoprobe 5400 sampling unit equipped with 1.125-inch probe rods. Proposed probing locations are illustrated on Figure 2.