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ekienvironment <br />& water <br />discussed in a Site meeting with RWQCB representatives and EKI on 30 April 2019. <br />Collection of a composite soil sample consisting of glass, soil, and cement was agreed to <br />at that meeting. The sample will be analyzed for the list requested by the RWQCB in an <br />email dated 6 May 2019. The list is provided below. The results will be reported in a <br />memorandum to the RWQCB. If chemical testing does not indicate any concentrations <br />above screening goals, these materials will be reused on the Site. <br />• Pile of Glass Material and Soil Slurry in Field: There is an area of glass material and soil <br />slurry on the east side of field to east of the main building (Figure 1-2). This area was <br />discussed in a Site meeting with RWQCB representatives and EKI on 30 April 2019. <br />Collection of a glass sample was agreed to at that meeting. The sample will be analyzed <br />for the list requested by the RWQCB in an email dated 6 May 2019. The list is provided <br />below. The results will be reported in a memorandum to the RWQCB. If chemical testing <br />does not indicate any concentrations above screening goals, these materials will be <br />reused on the Site. <br />• The chemical analytical list for these four samples is: <br />o Total petroleum hydrocarbons ("TPH") as gasoline, diesel, and motor oil by EPA <br />Method 8015B <br />o Semivolatile organic compounds ("SVOCs") by EPA Method 8270C <br />o Polychlorinated biphenyls ("PCBs") EPA Method 8082 <br />o Dioxins and Furans by EPA Method E1613 <br />o Title 22 Metals Total Threshold Limit ("TTLC") by EPA Method 6010/200.7; Soluble <br />Threshold Limit ("STLC") to be analyzed for any metals with TTLC exceeding 10 times <br />the STLC; for samples with metals above the commercial/industrial screening levels, <br />please follow up with Title 22 metals by Waste Extraction Method ("WET") by EPA <br />Method 1311 using deionized water as the extractant. <br />1.3.2 Identified Chemicals of Concern <br />As described in documents identified above, the following chemicals of concern ("COCs") were <br />identified at the Site. <br />o WU1 Sliver Area (AGE, 2019): <br />o Title 22 Metals <br />o Dioxin and furans <br />o Polychlorinated biphenyls ("PCBs") <br />o Total petroleum hydrocarbons ("TPH") as gasoline/diesel/motor oil <br />("TPH-g/d/o") <br />o Semi -volatile organic compounds ("SVOCs") <br />o Polycyclic aromatic hydrocarbons ("PAHs") <br />o Volatile organic compounds ("VOCs") <br />o Methane in soil gas only <br />