ARCHIVED REPORTS_2018 VERIFICATION RPT (DEC)

Home Browse Search

Brusca File No. 137-002 Page 6 December 14, 2018 Murphy Parkway Property Waste Materials Management Verification Report • Total Petroleum Hydrocarbons as gasoline, diesel, and motor oil by EPA Method 8015B • SVOCs by EPA Method 8270C • Polychlorinated Biphenyls (PCBs) by EPA Method 8082 • Title 22 Metals Total Threshold Limit (TTLC) by EPA Method 6010/200.7 • Arsenic and Lead by EPA Method 6010 • Dioxins and Furans by EPA Method E1613 The results of the above-listed analyses performed on verification soil samples collected beneath WU1 are summarized on Tables I through III; the laboratory reports and chain-of-custody documentation are included in the appendix of this report. For reference, hazardous waste criteria and screening levels established in the approved EMMP are included on the summary data tables. As shown on Tables I through III and the appended laboratory reports, none of the verification soil samples collected beneath the removed WU1 materials contained any of the tested analytes at concentrations above hazardous waste criteria or above the established/approved screening values for commercial/industrial site usage. As such, the verification soil sampling/testing results indicate that the WU1 removal activities were successful, and residual soil conditions in this area do not pose an unacceptable risk, considering future commercial/industrial site usage. 4.4 Removed Wastes/Stockpiles Sampling and Testing Per the provisions of the EMMP and Addendum, our firm also collected samples of the removed/stockpiled wastes from the WU1 area for analytical laboratory testing. The sampling was conducted by a Certified Engineering Geologist from our firm and was overseen by regulatory agency representatives. A total of 49 spatially distributed, random/representative samples of the WU1 materials was collected. The samples were placed in laboratory-provided glass jars, immediately placed on ice, and transported to State-certified analytical laboratories under chain- of-custody for analysis. Each sample was analyzed for the following: • Total Petroleum Hydrocarbons as gasoline, diesel, and motor oil by EPA Method 8015B • SVOCs by EPA Method 8270C • Polychlorinated Biphenyls (PCBs) by EPA Method 8082 • Title 22 Metals Total Threshold Limit (TTLC) by EPA Method 6010/200.7 • Dioxins and Furans by EPA Method E1613 As outlined in the EMMP, samples of stockpiled materials from WU1 containing the highest concentrations of total metals were analyzed for soluble Title 22 metals by the Waste Extraction Method (WET) by EPA Method 1311 using deionized water (DI) as the extractant; this element of the testing program was required by the CVRWQCB for the purpose of evaluating potential future leaching impact to groundwater posed by the waste materials. A total of 11 samples was selected for the DI WET metals testing, including samples from each of the five stockpiles. The results of the above-listed analyses performed on samples of removed/stockpiled wastes from WU1 are summarized on Tables IV through VII; the laboratory reports and chain-of-custody documentation are included in the appendix of this report. For reference, hazardous waste criteria and screening levels established in the approved EMMP are included on the summary data tables.