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will be decontaminated prior to <br /> hole. Well to commencing drilling at each <br /> necessary, ivn materials will be cleaned <br /> y prior to installation, as <br /> Equipment and well material decontamination <br /> conducted on an impermeable surface and a will be <br /> effluent will be contained. all decontam' a <br /> will be thoroughly All surfaces inat�v:i <br /> 4 I decontaminated usingof the equipment <br /> The equipment will be placed on a a the <br /> cleaner. <br /> drying. rying rack for air <br /> The decontamination water willstoredin containers <br /> certified for hazardous materials storage and disposed of in <br /> an approved manner. <br /> Sample equipment to be used <br /> for pesticides and o <br /> analysis will be washed in a nonphosphate detergent <br /> --- or equ valent rganic <br /> ) and rinsed with to g� (Aleonax <br /> deionized water and finally p water, ,.ollowed b <br /> is for metals anal Y with ketone. If the equipment <br /> with 0.1 N <br /> analysis, the initial rinse will be conducted <br /> nitric acrid followed by tap water and deionized <br /> water. <br /> 7.0 Field Equipment Calibration and Maintenance <br /> The following m ensuring equipment may be <br /> Remedial Investigation. g Y used during <br /> activit Equipment is grouped by field <br /> g the <br /> h piece.ybratzon procedures and frequency are listed <br /> for each <br /> SvilPotrinand Well Dimensions-Steel and <br /> Ccloth <br /> tapes. . alibration: coated <br /> none.�`�" <br /> 1 <br /> Water Level Measurements in Wells_ <br /> wilEa-ll at` manufacturer su~ Steel surveyors tape. <br /> _ will be applied as applicable PPlied temperature correction <br /> Electrical well sounders Calibration: check a field conditions. <br /> sii.rveyor,s tape. against steel <br /> Or anic VaAOrS- <br /> Dail — Photoionization detector. Calibration; <br /> manufacturers ain tru tions Ing a isobutYlene standard as per <br /> Groundwater pH Measurement- <br /> . <br /> Standard pH solution 4 Digital pH meterCalibration: <br /> daily fiele: 7, and 10 will be utilized for <br /> instruction'..- calibration according to manufacturers <br /> Electrical Cond� periodically <br /> u i�i�- Electrical conductivity meter. <br /> Cali on: factory-calibrated annually and <br /> calibrated against laboratory prepared standard calibration <br /> solution. <br /> ---- - - Water- Tem erasure= -- Mercu.- - <br /> - - - Calibration: ry <br /> factoor digital thermometers. <br /> ry-calibrated once. <br />