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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 bongs using a truck-mounted drill ng equipped with 6 25-inch, 8-inch, <br /> or 10-mch-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 Cahfornia-modified, split-spoon sampler equipped with clean <br /> brass sleeves Samples were collected by drilling the bonngs to a point gust above the <br /> ' sampling depth and then driving 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 photoioruzation 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 alumunum foil, plastic caps, and Teflon tape <br /> ' SAON 1PJM08051080514W 313L-95Vas 3 A-1 Rev 0,8/2195 <br />