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NO IF 141 ?A <br /> M-M-N- <br /> tai <br /> i <br /> .0 Drilling of four soil borings for the purpose of obtaining soil samples to be analysed <br /> -- in the field via gas chromamg aphy,2nd further testing by Bio National Corporation. <br /> o Conversion of four soil borings to ground water observation wells for the purpose of <br /> obtaining water samples for analysis at rireman's Fund Laboratories of Petaluma, <br /> ' - California. <br /> i Sor'':,Prings will be drilled to enr_ le installatiqn of observation well. Truck mountsd hollow- <br /> stem z:=aer drilling equipment will be used. <br /> '[ Frill baring will be advsn-gid to approximately ten feet below the water table or into a clay <br /> or other material below the water table,suspected to be of lower permeability,whichever is less <br /> { - deep. Undisturbed soil samples will be obtained using the Dames & Moore Type-U sampler <br /> driven by a 140 pound hammer falling 30 inches. Samples will bo collected from the borings at <br /> minimum int�rrgls of five feet. The clean sampler will be driven into the soil beneath tLe open <br /> borehole. The soil samples retained in the 3-inch stainless steel tubes will bo removed from the <br /> sampler and their ends sealed with teflon membranes and plastic end caps. Each samp�e selected <br /> E for chemical analysis will be securely sealed,labeled and stored in ice cooled containers. <br /> _ To prohibit cross-contamination of successive samples, the sampling equipment will be <br /> disassembled between sampling attempts and washed with a tri-sodium phosphate !TSP) soap <br /> �., solution. The sampicii will then be reassembled with clean 3-inch stainless ctael tubes and there <br /> used for subsequent sampling. All augers and sampling equipment will be thoroughly steara- <br /> 1 cleaned between borings to prevent cross-contamination. <br /> j <br /> Four ground water wells will be installed at the facility. `be wells will be installed for water <br /> level monitoring and ground water sampling purposes. <br /> Four ground water samples, one quality control dupticatz field blank,a travel blank and a <br /> rinsate sample will be collected for chemical analysis for each round of ground water sampling. <br /> Samples will be analyzed for total petroNlAum hyZITocarbons(TPH)and benzene,toluene,xylene, <br /> and ethylbenzene by EPA Method 1015 Modified and Method 602. <br /> , <br /> V. HAZARD At4AI_YS1'2 <br /> Based on the site background and planned activities, the fol!owing types of hazards exist: <br /> 4 Pinch points and rotating machinery associated with truck mounted drill rigs; <br /> Skin contact with potentially contaminated soil::nd water during sampling; <br /> i Inhalation of organic vapors during soil and water sampling; and <br /> inhalation and ingestion zf soil particles potentially contaminated with benzene, <br /> toluene, xylene,and ethylbenzene. <br /> Sampling in this area coFild result in the release of Contaminated particles and organic vapors. <br /> iA minimum revel of personnel protection must be recommended that will prcvant skin contact <br /> - with the soil and prevent respiratory inhalation of soil particles or vapors. Specifics regarding <br /> necessary protective measures aro addressed in t::? next secti-:!a. Also, the attached Material <br /> Safety Data Sheets(MSD..Ss) list impirtant properties of var'Jus contaminants thst may possibly <br /> I be encountered. <br /> 2 <br /> i. <br /> i <br /> j <br /> is <br /> I <br /> r <br /> f. <br /> a�:� <br />