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��� <br /> Mr.Jon Fletcher �� <br /> �ake West Development WENCK <br /> Elsinger Property Development <br /> July 8, 2015 <br /> Re�onslve paraier. <br /> �� <br /> � RCRA Metals <br /> The 8 RCRA metais include arsenic, barium, cadmium, chromium, lead, mercury, seleniurn, <br /> and silve�. Soil samples for RCRA metals were collected and analyzed from four of the test <br /> pits. <br /> Arsenic was detected above the laboratory reporting Itmit in afl the samples; however, only <br /> test pit TP-2 (6'} had a detection of arsenic at 9.22 mg/kg. This detection exceeded the <br /> Restdentlal SRV of 9 mg/kg and the Tier I SLV af 5.8 mg/kg, <br /> Cadmium concentrations were detected In TP-2 (6� at 13.0 rng/kg, which is above the Tier I <br /> S�V of 8.8 mg/kg. Cadrnium was detected below the regulatory limits in TP-4 (11'} at 6.67 <br /> mg/kg. Cadmtum was not detected above laboratory reporting Ilmits in TP-1 (9.8'} or TP-3 <br /> (5�. <br /> Lead was detected at concentrations above laboratory reporting lirnits in each of the focar <br /> collected samples. Lead concentratlons were reported at 45.7 mg/kg In sample TP-1 {9.8�; <br /> 332 mg/kg in sample TP-2 {6�; 18.8 mg/kg In sample TP-3 (5�; and 778 mg/kg in sampEe <br /> TP-4 (11�. The lead concentrations in TP-2 (6� and TP-4 (11'} exceeded the Resldentlal <br /> SRV of 300 mg/kg. <br /> A Toxicity Characteristic Leaching Procedure {TCLP) analysis for lead was conducted on the <br /> samples collected from TP-2 (6� and TP-4 {11� for disposal characterizatJon. Lead was not <br /> detected above laboratory reporting Iimits in either samp{e. <br /> Siiver was detected above the MPCA Tier I SLV of 7.9 mg/kg in TP-2 {6') which had a <br /> oon�entratlon of 18.8 mg/kg. Sllver was not detected above laboratory reporting limits in <br /> TP-1 (9.8'}, TP-3 (5� or TP-4 {li�. <br /> Barium, chromlum, mercury and selenium were detected above the laboratory detection <br /> Ilmits In several of the test pits; however, none of the concentrations exceeded thelr <br /> respective MPCA established Industrial/Residential SRVs or Tler 1 SLVs. <br /> yolatile Ordanic Compounds <br /> VOCs were analyzed in all four of the samples collected fram the pits using method 82606. <br /> Methylene chioride was detected above laboratory detection limtts in all four samples; <br /> however, none of the detectlons exceeded the MPCA SRVs. Methylene chlo�de <br /> concentrations exceeded the SLV of 0.017 mg/kg In three of the four collected samples. No <br /> ather VOCs were Identifled in the soil samples above thelr respective laboratory reporting <br /> iimlts. Methylene chloricie is often known as a laboratory contaminant and may not be <br /> present in the actual samples. <br /> ��nuclear Aromatic Hydrocarbons <br /> AI! four of the soll samples collected from the test pits were analyzed far PAHs. Low {evels of <br /> PAHs were identified in TP-2 (6') and TP-4 (11'). No individual PAHs were identil5ed in any of <br /> the soil samples above their respective IndustHal/Resldential SRVs or Tler I Si.Vs. <br /> Benzo(a)pyrene (BaP) equivalent concentratians were calculated to estimate the aggregated <br /> carclnogenic potential of PAHs relative to benzo(a)pyrene. The benzo(a)pyrene equlvalent Is <br /> calculated using the sufn of the products of the respective relative potency slope factors <br /> multiplied by the compound's soil concentration. TabuEated soil sample PAH results, <br /> 2 <br /> 1\wnod�ury-0ci\wooEW rylSsdnlul45503 leke Wat101-9Nnper Ekab�lT�di mamo\Bstnper txhnlal mena.do« <br />