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organic vapor using a calibrated photoioruzation detector The results of the <br /> field testing will be noted with the lithologic descriptions on field exploratory <br /> soil boring log Soil samples selected for laboratory analysis will be covered <br /> on both ends with teflon tape and plastic end caps The samples will then be <br /> ' labeled, documented on a chain-of-custody form and placed in a cooler for <br /> transport to a state certified analytical laboratory <br /> ' Drill soil cuttings will be stockpiled on plastic and covered to control runoff, <br /> or placed in 55 gallon D Q T drums on site, sampled for landfill profiling <br /> purposes and hauled by a licensed hazardous waste hauler to an appropriate <br /> landfill All waste stored on site will be clearly labeled <br /> ' Well Installation <br /> Soil borings not to be converted into monitoring wells will be sealed to the <br /> ground surface using either neat cement or a cement/bentonite grout mixture <br /> in accordance with federal, state and local regulations <br /> Soil borings that will be converted into monitoring wells will be a minimum <br /> of eight inches in diameter for 2-inch diameter wells and a minimum of ten <br /> inches in diameter for 4-inch diameter wells Monitoring wells will be <br /> constructed with schedule 40, threaded polyvinylchloride (PVC) casing and <br /> have factory-slotted screen The screened interval will be placed such that it <br /> will extend approximately ten feet into the water bearing zone, and at least <br /> ' two feet above the expected water level Screen slot size and sand pack will be <br /> chosen based upon the expected aquifer materials A graded sand,pack will be <br /> placed in the annular space across the screened interval and extended <br /> approximately one to three feet above the screen A minimum of a one foot" <br /> seal of bentonite will placed above the sand pack' The bentonite seal will be <br /> ' hydrated by either formation water or distilled water Neat cement or,a <br /> cement/bentonite grout mixture seals the remaining annular space to Ithe' <br /> surface If bentonite is used in the grout mixture, it will not exceed 5% by <br /> ' weight A watertight locking cap and protective traffic-rated vault box will be <br /> installed on top of each well All well materials will be free from <br /> contamination prior to installation Complete well construction details will <br /> be presented on the field exploratory soil boring,log Fluids or lubrications <br /> will not ,be used during the connection of individual lengths of screen and " <br /> solid casing; other than distilled water <br /> III ( { <br /> 14` <br /> +, <br /> ' �I <br /> s f [ <br /> CLEARWATER GROUP,INC November 9, 1994 <br /> iliIII �� Ir4 E1 E�I� I I <br /> r <br /> " <br /> IIIIIBiF �llE, I '�'ll I ill�lw"Ili k�I��" k 411i�1�3 I Illr��` " I�ulr�"I Yfpk Ir "I I ��l ( l "� II"Ifl�� IIY�II�II"III,i,llHll,�lf it, IYY��iil" 11 ll�II�' [ <br />