Laserfiche WebLink
{ 3 , <br /> -� samples and one . field blank will be prepared. These duplicates and the <br /> field blank will be sent to the laboratory selected to conduct the <br /> analyses. Duplicates will, also be collected for an additional 10 percent <br /> of the samples and these duplicates will be sent to a second check <br /> laboratory. Wells will be sampled twice shortly after well development. <br /> The need for and frequency of eubeequent eampling will be evaluated <br /> following receipt of the analytical results from the first round of <br /> sampling. <br /> Samples will be analyzed , routinely for total chromium and as--- appropriate <br /> for hexavalent chromium." Temperature, conductivity, and PH measurements <br /> will be taken in the field. Chromium is the only contaminant that has been <br /> identified in groundwater in the vicinity of the MCTC facility in the past. <br /> In addition, analytical results for the last three years of monitoring <br /> indicate that virtually all of the chromium in the groundwater is <br /> hexavalent chromium. Therefore, routine analyses for total chromium should <br /> be sufficient to define the contaminant plume. Total chromium will ca <br /> analyzed in accordance with Method 218.1, or equivalent, as cited isi <br /> .Methods for Chemical Analysis of Water and Wastes", EPA, 1979. Hexavalent <br /> Ir <br /> chromium will be analyzed in accordance with Method 312.8, or equivalent, <br /> as cited in "Standard Methods for the Examination of Water and Wa:stewater", <br /> American Public Health Association, 1980. Analyses will be collducted by <br /> laboratories certified by DOHS' Hazardous Materials Laboratory. <br /> 4.1.3 Storm Water Sam rtg i ng <br /> Analyses of :storm water runoff samples from the south yard and soil samples <br /> from the drainage ditches southwest of the south yard showed that the::e <br /> samples were contaminated with wood treatment chemicals. The source of <br /> these chemicals appears to have been. treated wood spacer=.; and support <br /> Pallets used in the couth yard in the past. In order to remove all woad <br /> treatment residues from the south yard, an extensive Yard surface cleaving <br /> pry gram has been implemented. After this clraIirt, program has been <br /> completed, additional grab samples of surface runoff will "De collected from <br /> 4 -10 <br />