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<br />pesticides <br />metals <br />inorganics <br /> <br />solid phase extraction: GC/MSD <br />ICP I GFAA <br />varies with analyte <br /> <br />I <br />I <br />I <br />.' <br />I <br />I <br />I <br />I <br />II <br />III <br />I <br />I <br />I <br />I <br />I <br />. <br />.1 <br />.' <br />. <br /> <br />'. <br /> <br />0300 <br /> <br />3. Spikes <br /> <br />Up to five pesticide spiked samples were submitted to the organic laboratories <br />for lab QAlQC. These spiked samples were prepared in duplicate in <br />accordance with instructions provided by the manufacture of the spiking kits. <br /> <br />4. Duplicate Spikes <br /> <br />Duplicate spiked samples as described above. <br /> <br />Ground water samples were protected from undue exposure to light during handling, <br />storage, and transport. Samples were stored on ice to prevent temperature extremes and <br />transported to the CDA, or CSU laboratory and analyzed within the recommended holding <br />periods. Documentation of actual sample storage and treatment were handled as part of the chain <br />of custody procedures. <br /> <br />DECONTAMINATION PROCEDURES <br /> <br />Wells were sampled to minimize the potential for cross contamination. Decontamination <br />procedures were adhered to between each sampling event. All common sampling equipment was <br />decontaminated prior to and between all sampling events by washing with a nonphosphate <br />detergent and triple rinsing with deionized water. Since pesticides were the constituents of most <br />concern due to the low levels detectable, no sampling equipment was common between wells for <br />the pesticide sampling. <br /> <br />CONTROL OF CONTAMINATED MATERIALS <br /> <br />The sampling team disposed of all wastes produced during the investigation in accordance <br />with Federal and State regulations. Disposable sampling equipment was bagged, removed from <br />the site, and disposed of as a nonhazardous material. <br /> <br />LABORATORY ANALYSES <br /> <br />All water samples were analyzed for selected pesticides currently used in the area, basic <br />inorganic minerals including nitrate, and dissolved metals. Table 3 provides a listing of the <br />laboratories used, the chemicals analyzed by each, and their detection limits. All collected <br />samples (classified as environmental samples) were transported to the designated laboratory as <br />medium hazard and analyzed accordingly. EPA analytical methods for each parameter group <br />were as follows: <br />