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k k1 <br /> GENERAL FIELD PROCEDURES <br /> Sampling Assignments (TSR) <br /> � <br /> and Samp 9 Request ( <br /> Groundwater Monitoring provided with a Technical Service nd sampling <br /> For each site, TRC technicians are P lete the groundwater monitoring <br /> that specifies activities required to compuiremructi and TRC's <br /> Rs are based on client directives, instructions <br /> from the <br /> assignment for the site TS site, regulatory requirements, <br /> primary environmental consultant for the <br /> previous experience with the site map <br /> provided <br /> Fluid Level Measurements <br /> include deterrriination of well locations based ed a Irid cat ons a well or well <br /> initial site activitiesopened and caps a <br /> with the TSR Well bessure bues are dup in the well are noted a equipped with an <br /> box damage, or of p easured using a coated cloth tap <br /> Fluid levels in each robe, which distingu+ell are M he between liquid phase hydrocarbon (LPN) <br /> electronic interfac p to water, and to the bottom of the well are <br /> th to LPH (if it is present), ars marls or notch if present) <br /> and water The del of the well casing (survey <br /> measured from the top the well casing is considered <br /> nearest 0 01 foot Unless <br /> otherwise instructed, a well w{h less than {3 67 fool between <br /> the measured top of water and the measured bottom o <br /> if the well contains Q 67 foot or more of water, an attemp is <br /> dry, and is not sampled le as specified on the TSR <br /> made to bail and/or same ur ed or sampled_ instead, one dosed <br /> ing <br /> Wells that are found to contain LPH a;e not purged <br /> ll rl disposed <br /> sled from the well and the well is rer-sealed Bailed fluids are p <br /> volume of fluid is ba Purge a water, and properly <br /> in a container separate from normal p 9 <br /> lin be purged <br /> Purging and Groundwater paramaetre�lNe t be purged (iso-purge sampling), <br /> n jor bad methods <br /> TSR instructions may specify thatconventional pump <br /> or be purged using <br /> three <br /> using low-flow methods, in or bailing until a rri+rUiiiiirn of <br /> dry <br /> Conventional purging generally consists of pump g <br /> f water have been removed e Able electriclhas beer)or pneumaticdiaphragm <br /> lcasing volumenerally accomplished using submersible <br /> Pumping is 9 H, and <br /> t pumps Parameters (temperature, p <br /> ur Ing, groundwater P volume Stabilization of these <br /> During conventional A g gmoval of Completed In <br /> conductivity) are measured cfent,confirm that sufficient purging has been <br /> parameters, to within 10 pe oxidation-reduction potential <br /> indicates that other parameters are a{so to be measured <br /> during <br /> some cases, the TSR measures dissolved oxygen (D }� <br /> TRC commonly <br /> ' purging Instruments used for groundwater parameter measuremen are <br /> (ORP), andlor turbidity <br /> pump to remove water irominuou ly u� it <br /> calibrated daily according to manufacturerInstruc ions n <br /> Low-flaw purging utilizes a bladder or peristalticthe TSR are measured co <br /> low rate Groundwater parameters specified by guidelines accordance with EPA ges <br /> they become stable in g <br /> ees Dnims may be left on <br /> water is generally collected in labeled drums for dispfor osal be collected <br /> purge transported to a collection location water may be <br /> transfer to <br /> site for disposal by others, or <br /> a licensed treatment or recycling <br /> facility In some caseasi�, p orgmay be treated on site by <br /> directly <br /> from the site by a licensed vacuum truck company, <br /> an active remediation syste+ , if so directed <br />