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26 May 1998 <br /> AGE-NC Project No. 98-0454 <br /> Page 3 of 4 <br /> 4.0. PROCEDURES <br /> 4.1. COLLECTION OF SOIL SAMPLES <br /> For the collection of soil samples,the following procedures will be performed: <br /> 1. Prepare a site health and safety plan in accordance with Occupational Safety and Health <br /> Guidance Manual for Hazardous Waste Site Activities (Prepared by National Institute for <br /> Occupational Safety and Health Administration,U.S. Coast Guard and U.S. Environmental <br /> Protection Agency, 1985). <br /> 2. Notify the PHS-EHD 48 hours prior to commencement of any work, while securing proper <br /> city/county soil boring permits. <br /> 3. Boring locations will be marked at least 48 hours in advance for an Underground Service <br /> Alert (USA)check of underground utilities or pipes. <br /> 4. Advance six(6) probe borings using a van-mounted Geoprobe equipped with a 1.125-inch <br /> diameter probe rods. Probe borings will be advanced to depths 25 feet bsg. Probe boring <br /> locations are illustrated on Figure 2. If field conditions indicate that impacted soil is present, <br /> additional probe borings maybe advanced. <br /> 5. Decontaminate sampling equipment in an Alconox solution and rinse twice with water prior <br /> to each sampling run. <br /> 6. Obtain discrete soil samples at five foot intervals, using a Geoprobe soil sampler assembly <br /> loaded with pre-cleaned 1.125-inch by 6-inch brass or teflon sleeves. <br /> 7. Preserve soil in the second or teflon brass sleeve by covering both ends with Teflon sheets, <br /> capping, and sealing with tape. Label and log samples on a chain-of-custody form. <br /> 8. Store the samples under ice and transport the samples in a chilled container to a state- <br /> certified laboratory for analysis. <br /> 9. Screen soil sample duplicates for the presence of volatile organics using a photo-ionization <br /> detector(PID)pre-calibrated to isobutylene. <br /> 10. Log borings in accordance with the Unified Soil Classification System. <br /> 11. Backfill each probe boring using a concrete-bentonite slurry throughout the entire depth of <br /> the probing . <br /> 12. Selected soil samples for total petroleum hydrocarbons quantified as gasoline (TPH-g), <br /> volatile aromatic compounds(benzene,toluene, ethyl-benzene and total xylenes: BTE&X), <br /> if field observations indicate the presence of other petroleum hydrocarbons, additional <br /> analysis may be necessary. <br /> Advanced GeoEnvironmental,Inc. <br />