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t 1 <br /> ATTACHMENT A <br /> FIELD PROCEDURES <br /> Site Safety Plan <br /> This plan describes the safety requirements for field work performed at the site The site <br /> safety plan is applicable to personnel of EMCON who perform the field work A copy of <br /> the site safety plan is available for reference by appropriate parties during the work The <br /> on-site representative of EMCON acts as the Site Safety Officer <br /> Drilling Soil Borings <br /> Before drilling, we hand augured each borehole to 3 to 5 feet below grade A licensed well <br /> driller drilled the bonngs using a truck-mounted drill ng equipped with 6 25-mch, 8-inch, <br /> or 10-inch-diameter hollow-stem augers The drilling was performed under the guidance <br /> of a field geologist During drilling, soil samples were collected at 5-foot or other <br /> appropriate intervals using a Cahforn ia-modified, split-spoon sampler equipped with clean <br /> brass sleeves Samples were collected by drilling the bonngs to a point Just above the <br /> sampling depth and then dnving the sampler into the soil through the hollow center of the <br /> auger The sampler was driven 18 inches with a standard 140-pound hammer dropped <br /> 30 inches The number of blows required to drive the sampler each successive 6-inch <br /> interval was counted and recorded on the field boring log to give an indication of soil <br /> consistency <br /> The earth materials were logged using visual and manual methods as drilled using the <br /> Unified Soil Classification System A photoionizatnon detector (PID) was used to evaluate <br /> soil samples for gasoline hydrocarbons Field instruments, such as the PID, are useful for <br /> indicating relative levels of gasoline hydrocarbon vapors but do not detect the <br /> concentration of gasoline hydrocarbons present with the same precision as laboratory <br /> analyses Subjective evidence of gasoline hydrocarbons, such as soil discoloration or <br /> obvious odor, was noted <br /> Sample Labeling and Handling <br />. Soil samples selected for possible laboratory analysis were removed from the sampler and <br /> quickly sealed in their brass sleeves with aluminum foil, plastic caps, and Teflon® tape <br /> SAM TJUY 80%8051520 2135-951pas 3 A-1 Rev 0 8!3!95 <br />