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k" KLEINFELDER <br /> 4 ANALYSIS FOR SOIL SAMPLES <br /> The soil samples selected for chemical analyses will be delivered under <br /> ' chain—of—custody to a DOHS certified analytical laboratory. Several <br /> analyses will be conducted to obtain information relevant to SI closure <br /> ' and development of an HAR. <br /> Twelve routine samples, four from each boring, will be submitted for <br /> analysis of concentration of selected metals. Either an Atomic Adsorption (,CF, <br /> ' (AA) spectrometer, or Inductively Coupled Argon Plasma (ICRP) spectrometer <br /> will be utilized in the analyses. The appropriate method will be used to <br /> obtain detection limits less than or equal to 1 mg/kg (ppm) . The <br /> analytical technique will involve nitric acid digestion except for <br /> chromium VI which will utilize the base extraction procedure specified in <br /> ' EPA SW-846. Samples will be analyzed for concentrations of chromium III, <br /> chromium VI, copper, lead, nickel, and zinc. <br /> dy <br /> 1 <br /> 51-87-413 5 <br />