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CLEARVVATER <br /> G R O U P, I N C. <br /> organic vapor..using a.calibrated photoionization detector. . The results of the <br /> field testing will.be noted with the-iithologic 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.O.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...L : <br /> - - ' Well Installation .•;' .: - • _ : .: _ •: . - . <br /> Soil borings riot.to be converted into monitoring wells will be sealed to the <br /> t ground surface using either neat_ cement or a cement/bentonite grout mixture <br /> in accordance with federal, state and local regulations. <br />'0 Soil borings,that will be converted into monitoring :wells will be' a min_imum <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 /> I ' have factory-slotted screen. The screened interval will beP laced such that it <br /> will-extend approximately'ten feet into the water bearing zone, and at least' <br />' two feet above the expected water r 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 .ihe remaining- annular space to' the <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 /> Iinstalled 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 durin& the connection of individual lengths of screen -and <br /> solid casing, other than distilled water. <br /> 2 <br /> CLEARWATER GROUP,INC. April 28, 1995 � <br /> I <br />