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Colorado Ui~lch Ii'etlanc~s Beach Test <br />Tech»~cal ~1len~oranc~rin~ <br />• Decontaminated plastic cup/bearer for field measurement of pH and ORP. <br />• 0.4~ µm filters for dissolved metals samples. <br />• TygomR tub>lig for sa~npluig. <br />Field equipment: <br />• Flo« measuring device (i.e. graduated cylinder). <br />• Latei and/or Nitrile gloves <br />Pipe repair supplies flinch pipe couplers, duct tape, 1 inch & 3/4 inch hose clamps, pipe cutters, hand <br />tools. etc.) <br />3.0 Quality Assurance/Quality Control Procedures <br />Both eater quality and sample aliquot collection used QA/QC measures to ensure accurate data <br />collection. Daily water quality of the cells will be measured using a Myron Ultrameter and/or an <br />HACH Sension 1 and ~ «-ater qualit<- meters. <br />3.1 Calibration Procedures <br />The ~~-ater quality meters used, Myron L Ultrameter II 6P, Hach Sension 5 and Hach Sension 1, are to <br />be calibrated for pH using standard buffer reference solutions. Each day- the water qualit<- meters ~~~ill <br />be calibrated to a reference of pH 4 and pH 7 at 2~° C. For conductivity. a standard solution of 1413 <br />µs at 2~°C is to be used to calibrate the M~-ron L Ultrasneter II 6P and Hach Sension 5 meters. After <br />pH and conductivity measurements were obtained from each cell, the probe is to be thoroughly raised <br />with DI ~~-ater. <br />3.2 Decontamination Procedures <br />The probes used for each meter will ~ undergo decontamination prior to each dai1~- measurement <br />event and bet<tieen cell measurements by rinsing with DI water. After each dai1~- measurement event. <br />the probes ~~-i11 be rinsed with DI eater, ail dried, and stored ili clean plastic bags. <br />Ne~~ T~ gon ~'~ tubilig ~~-ill be used for each «~eeldy sampling event. Prior to each sampling event, the <br />original tubing ~~, ill be discarded quid replaced with nes~- tubing. Water from the associated cell will be <br />flushed through the new tubing prior to sampling and filtration. <br />Collection of sample aliquots will require all individuals involved to wear non-po« dered latei gloves <br />throughout the process. Gloves ~~ i11 be changed in-between the sampling of the cells. <br />The holding tasilc «~ill be rinsed out ~~~ith tap ~~~ater prior to each daily collection of Colorado Gulch <br />water. Before final collection of Colorado Gulch water, the holding tank will rinsed with Colorado <br />Gulch water to precontaminate the holding tank. <br />11 CMC NRM <br />