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No Further Action Required Request Report
<br /> US Can—Welty Road September 24, 201
<br /> 7. Report the volume of excavated soil disposed off-site, or remaining on site.
<br /> Approximately 29.86 tons of soil were removed from the Hunter Container property by WHF,
<br /> Inc. (WHF)in 1996 as part of the waste/bum pit investigation. The soil was disposed at a
<br /> Class 1 hazardous waste facility located in Kettleman City, California(WHF, 1996; Appendix
<br /> BA). The excavation was unrelated to HPP-BTR activities.
<br /> 8. Describe the fate of any remaining monitoring and remediation wells(destroyed,
<br /> ownership transferred, or to remain in use).
<br /> Groundwater monitoring wells MW-4 and MW-5 were destroyed in August 2008. Wells MW-1,
<br /> MW-2, and MW-3 were destroyed in July 2010. No groundwater monitoring wells remain at the
<br /> Site.
<br /> 9. Provide tabulated results of all groundwater elevations and depths to water.
<br /> A comprehensive table showing all tabulated results of groundwater elevations and depths to
<br /> water is included in the SAIC Annual 2009 Groundwater Monitoring and Sampling Report,
<br /> included as a component of Appendix B. Groundwater elevations were not calculated for grab
<br /> groundwater samples collected during soil and groundwater investigations.
<br /> 10. Provide tabulated results of all sample analyses, including the sampling method and
<br /> detection limits. Analytical results must include TPH and BTEX constituents, lead,
<br /> MTBE,EtBE, TBA,ETBE,DIPS, TAME, ethanol,methanol, ethylene dibromide,
<br /> 1,2-dichloroethane, and other constituents as indicated in Table#2 above. Provide any
<br /> WET or TCLP results.
<br /> Soil and groundwater analytical results for TPH as crude oil(TPHc),TPH as gasoline(TPHg),
<br /> TPHd, BTEX,methyl tertiary butyl ether(MTBE),PAHs, general mineral analyses, and fuel-
<br /> fingerprint results are provided in the reports included as Appendix B. Tables and figures from
<br /> previous reports are included as Appendix C. Tertiary butyl alcohol (TBA), ethyl tertiary butyl
<br /> ether(ETBE), diisopropyl ether(DIPE), tert-Amyl methyl ether(TAME), ethanol,methanol,
<br /> ethylene dibromide, and 1,2-dichloroethane are not considered COPCs and were therefore not
<br /> analyzed. Although not considered a COPC, lead was analyzed during an environmental
<br /> assessment by ERM-West(ERM-West, 1995; Appendix B.1)and the excavation of a former
<br /> burn pit by WHF(WHF, 1996; Appendix BA).
<br /> Soluble threshold limit concentration metals analysis was performed on a composite soil sample
<br /> collected by WHF during the excavation of the former burn pit. Toxicity characteristic leaching
<br /> procedure(TCLP) tests have not been performed on soil samples.
<br /> 11.Discuss concentration and mass changes over time, and current concentrations of
<br /> contaminants remaining in groundwater at the site.
<br /> Groundwater monitoring was conducted at the Site between 1996 and 2009. Monitoring wells
<br /> MW-1 and MW-2, located within the Area 2 and Area 3 hydrocarbon-affected plumes,
<br /> respectively,were rarely sampled due to the presence of SPO. MW-3, located between affected
<br /> soil plume Areas 1 and 2, had detections of TPHd ranging from<50 µg/L to 6,700 gg/L;
<br /> fluctuations in TPHd concentrations appear to correlate to changes in groundwater elevation.
<br /> MW-4 and MW-5, located up gradient(southwest) and down gradient(northeast),respectively,
<br /> of hydrocarbon-affected groundwater did not have any detections of TPHd or PAHs above ESLs.
<br /> 8 SAIC
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