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). H. KLEINFELDER & ASSbCIATES <br /> File : PW86-1017 <br /> May 15 , 1986 <br /> Page 2 <br /> SCOPE OF WORK <br /> I. Soil Boring & Samoling <br /> A single boring will be drilled at each end of the tank <br /> at a 450 angle to a depth of 17 feet 'using hollow-stem auger <br /> equipment . Because the tank is located under the building <br /> one of the borings will be drilled from within the building <br /> using a portable drilling device. Adequate clearance will <br /> be necessary for a forklift to enter and maneuver within the <br /> building to situate the drill rig. We anticipate utilizing <br /> a truck-mounted auger rig for the boring to begin outside <br /> the building. One sample will be collected from the <br /> termination of each boring. The samples will be placed in <br /> ice-cooled chests and handled under strict chain-of-custody <br /> procedures to ensure sample integrity. All field work <br /> performed will be under the supervision of a staff level J. <br /> H. Kleinfelder geologist. <br /> II . Laboratory Analysis <br /> It would not be economical or necessary to analyze for <br /> all the pesticides which may have been discharged to the <br /> rinsewater holding tank. We evaluated the list of <br /> pesticides provided to us and consulted with our chemists <br /> and contract laboratory and selected three chemical groups <br /> for the analytical program. Based on availability of <br /> analytical reference standards, chemical mobility and cost <br /> of analyses, we recommend organophospate and carbamate <br /> Desticide scans and analyses for volatile aromatic <br /> hydrocarbons. The volatile aromatic hydrocarbon scan is <br /> included to detect the carriers normally used in many <br /> pesticide formulations. These three analytical scans should <br /> indicate whether leakage from the holding tank has occurred. <br /> We did consider use of the priority pollutants <br /> Desticide scan but decided against using this type of <br /> analysis. This analysis generally screens for <br /> organochlorine pesticides and would not detect any of the <br /> listed compounds. <br /> III . Report of Findinas <br /> A summary report will be prepared with results of our <br /> field and laboratory investigations to include <br /> recommendations for further investigation if deemed <br /> necessary. <br />