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i 16 APPENDIX A FIELD PROCEDURES ' Site Safety Plan This plan describes the safety requirements for field work performed at the site The site safety ' plan is applicable to personnel of EMCON who perform the field work A copy of the site safety plan is available for reference by appropriate parties during the work The on-site representative of EMCON acts as the Site Safety Officer Drilling Soil Borings ' EMCON contacted Underground Service Alert at least 48 hours before drilling to delineate public utility lines at the site Before drilling, we hand augured each borehole to 3 to 5 feet below grade A licensed well duller dnlled the bonngs using a truck-mounted drill ng equipped with 8-inch and 10-inch-diameter hollow-stem augers The drilling was performed under the guidance of a field geologist During drilling, soil samples were collected at 5-foot or other appropriate Intervals ' using a California-modified, split-spoon sampler equipped with clean brass sleeves Samples were collected by drilling the boring to a point dust above the sampling depth and then driving the sampler into the soil through the hollow center of the auger The sampler was driven 18 Inches with a standard 140-pound hammer dropped 30 inches The number of blows required to dnve the sampler each successive 6-inch interval was counted and recorded on the field boring log to give an Indication of soil consistency iThe earth materials were logged using visual and manual methods as drilled using the Unified Soil Classification System A PID were used to evaluate soil samples for gasoline hydrocarbons Field instruments such as PrDs are useful for Indicating relative levels of gasoline hydrocarbon vapors but do not detect the concentration of gasoline hydrocarbons present with the same precision as laboratory analyses Subjective evidence of gasoline hydrocarbons such as soil discoloration or ' obvious odor was noted ' Sample Labeling and Handling Soil samples selected for possible laboratory analysis were removed from the sampler and quickly sealed in their brass sleeves, plastic caps, and Teflon`v tape The respective sample containers were labeled in the field with the fob number, sample location, depth if applicable, and date, and SACNN\PJ2\2613\2613I000 1 BB-95V1b 2 A-I Rev 0,215197 ' 22613-100 001