Laserfiche WebLink
WEISS ASSOCIATES <br /> between samples The cuttings collected from the soil borings were placed on,and covered with, <br /> plastic sheeting and secured <br /> 2 2 ANALYTIC RESULTS FOR SOIL <br /> Analytic results for the soil samples are presented in Tables 1 and 2 and the analytic <br /> reports are included as Appendix B The sample depths indicated on the tables are depth below <br /> ground surface The soil samples collected beneath Vaults 1 and 6 were analyzed by gas <br /> chromatography/flame ionization detection(GC/FID)in a manner similar to EPA Method 8015 <br /> A "DB Wax" megabore-type column was used in the gas chromatograph Ethylene glycol and <br /> propylene glycol analyses used a five point calibration curve to standardize the GC, and had <br /> method detection limits of 1 part per million (ppm) <br /> Although ethylene and propylene glycol were not detected in samples deeper than 45 feet <br /> at Vault 1,glycols were detected in three of five Vault 1 samples at depths shallower than 45 ft <br /> The maximum concentrations detected were 500 parts per million (ppm) ethylene glycol and <br /> 9,900 ppm propylene glycol,both at 27 6 ft depth Glycols were not detected in samples deeper <br /> than 33 ft at Vault 6 The highest concentration of propylene glycol was 22,000 ppm at 13 3 <br /> ft The highest ethylene glycol concentration was 3,000 ppm at 219 ft depth <br /> The Vault 8 soil samples were analyzed for total chromium, total hexavalent chromium, <br /> sodium, calcium, chlorides and soluble total chromium Extraction and analytic methods for <br /> these samples are shown at the end of Table 2 Due to a communication error with the analytic <br /> laboratory, soil samples were analyzed for total hexavalent chromium rather than soluble <br /> hexavalent chromium <br /> The soluble total chromium totalhr <br /> c omium and total hexavalent chromium analytic <br /> results for the Vault 8 samples were below their respective DHS STLC and TTLCs Although <br /> the sodium analytic results did not significantly exceed the sodium background concentration, <br /> the calcium and chloride results did exceed their respective background concentrations <br /> The results of the soil analyses will be used to determine the appropriate disposal of the <br /> soil stockpiles generated during drilling <br /> D 1ALL1331DWG1331R1MA1 WP Page 8 <br />