Laserfiche WebLink
Field Parameters <br />' Field parameters including temperature, pH, and conductivity were collected during the <br />May, 2009 sampling. The data collected indicate that pH at the site is very close to <br />neutral. Conductivity is highest in the alluvial wells where some turbidity was noted. <br />' Quality Control <br />' One set of field duplicate samples was collected during the monitoring event. Sample <br />Dup-01 was submitted as a blind field duplicate of primary alluvial well sample MW002. <br />Precision between the results of the primary and duplicate samples was very good for all <br />' parameters tested. <br />One equipment rinsate blank was collected during the monitoring event. The blank was <br />collected by pouring laboratory-supplied de-ionized water through a new bailer and into <br />the appropriate sample bottles. Silicon was detected in the field blank at a concentration <br />more than an order of magnitude less than that detected in the associated groundwater <br />samples. No action is taken based on the silicon detection in the blank, as no bias to the <br />sample results is indicated. <br />All laboratory data packages were reviewed to ensure that quality control elements <br />(holding times, blanks, control samples, and matrix spikes), impacting precision and <br />accuracy of the groundwater results presented were within appropriate control limits. <br />Data from the contract laboratories was found to be acceptable in terms of data quality <br />and industry standard presentation, with the following considerations. A laboratory <br />control sample (LCS) recovery for silver was high in one quality control analysis. Silver <br />was not detected in any of the associated samples, and no bias to the sample results is <br />indicated. <br />4