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26 January 1998 <br /> AGE-NC Project No. 97-0394 <br /> Page 3 of 4 <br /> 4.0. PROCEDURES <br /> 4.1. COLLECTION OF SOIL AND GROUND WATER SAMPLES <br /> For the collection of soil and ground water 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. Initial, advance four (4) probe borings using a van-mounted Geoprobe'equipped with a <br /> 1.125-inch diameter probe rods. Probe borings will be advanced to depths of 25 feet bsg. <br /> Probe boring locations are illustrated on Figure 2. If field conditions indicate that impacted <br /> soil is present, additional probe borings may be 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,sleeves. <br /> 7. Preserve soil in the second brass sleeve by covering both ends with Teflon sheets, capping, <br /> 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 in the entire depth of the �. <br /> probing. <br /> 12. Selected soil samples for total petroleum hydrocarbons quantified as gasoline (TPH-g), <br /> volatile aromatics (benzene, toluene, ethyl benzene and total xylenes: BTE&X). If field <br /> observations indicate the presence of other petroleum hydrocarbons,additional analysis may <br /> Advanced GeoEnvironmental,Inc. <br />