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a <br /> r <br /> I <br /> i <br /> 4' <br /> t <br /> i <br /> x <br /> Vince Bruscas <br /> June 24, 2019 <br /> Page 5 <br /> Three test pit samples were analyzed for volatile organic compounds. Volatile organic <br /> compounds were detected in one of three samples,with both detections being below their <br /> respective MTCA Method B standards. Four test pit soil samples were analyzed for <br /> arsenic,cadmium, chromium, lead,and mercury. There were no detections of arsenic, <br /> cadmium, or mercury in any of the four samples. Chromium was detected in all four test <br /> pit soil samples with lead detected in two of four test pit soil samples. All detections of <br /> chromium and lead were below their respective MTCA Method A standards. <br /> In February, and May of 2018,groundwater samples were collected from all four <br /> groundwater monitoring wells(one well was dry in May) and analyzed for gasoline, <br /> diesel, oil,polycyclic aromatic hydrocarbons, and total metals(arsenic, cadmium, <br /> chromium, lead, and mercury). There were no detections of gasoline, diesel, cadmium, <br /> or mercury in any groundwater sample. One of seven groundwater samples had a <br /> detection of oil. One of seven groundwater samples had a detection of naphthalene with <br /> no detections of any other polycyclic aromatic hydrocarbons. Three of seven <br /> groundwater samples had a detection of arsenic,three of seven groundwater samples had <br /> a detection of chromium, and one of seven groundwater samples had a detection of lead. <br /> None of the detections of oil,naphthalene,arsenic, chromium,or lead exceeded their <br /> respective MTCA Method A or Method B standards. <br /> 2. Establishment of cleanup standards. <br /> Ecology has determined the cleanup levels and points of compliance you established for <br /> the Site meet the substantive requirements of MTCA. <br /> Soil <br /> Diesel—2,000 mg/Kg <br /> Oil—2,000 mg/Kg <br /> cPAH—0.1 mg/Kg(TEF) <br /> Note the cleanup standard(toxicity equivalent factor—TEF)for carcinogenic <br /> polycyclic aromatic hydrocarbons(cPAHs)is based on conversion of the toxicity <br /> of the individual PAHs to the equivalent toxicity of benzo(a)pyrene,then <br /> summing the individual equivalent toxicities <br /> i <br /> 3 <br /> z <br /> ii <br /> E <br /> 6 <br />