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` ' J <br /> \1 <br /> CLEARWAOTER <br /> G R O U P, I N C. <br /> • <br /> sampler, sealed with teflon tape and end caps, and forwarded to the project lab for <br /> analysis of metals, TPH-gasoline/BTEX, TPH-diesel, and chlorinated solvents (as <br /> requested in your letter). The lab will composite samples as directed, and retain the <br /> discrete samples for additional analysis as described above. . Lab work will be <br /> completed well within the holding-time windows of the various procedures to <br /> enable analytical quality control in the event individual discrete sample analysis is <br /> required. <br /> It is also recommended that two composite samples of native soil beneath the pile <br /> be collected during characterization efforts. These samples should be collected on a <br /> grid spacing of 100-cubic-yards-(four-100 yard -discretes comprising each compogite) <br /> and analyzed only if the related pile composites within an associated 100 yard grid <br /> test positive using the listed analytical methods. A single four-tube composite <br /> should be collected from the small-pile remaining at the Union Street site. <br /> It would be helpful to discuss this recommended approach and overall objectives <br /> following your review of the presented information, perhaps by a meeting in your <br /> office. Please give me a call at your earliest convenience to discuss. <br /> Sincerely, <br /> CLEARWATER GROUP, INC. <br /> Markus Niebanck, R.G. <br /> Operations Manager . <br />