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SITE-SPECIFIC HEALTH AND SAFETY PLAN FOR PHASE II ENVIRONMENTAL SITE ASSESSMENT <br /> Site Background and Chemical Hazards <br /> July 7, 2023 <br /> Constituents of Potential Concern and Maximum Concentrations <br /> Constituent Sample Date Media Well/Sample Concentration MCL or Action <br /> Location (mg/kg) Level <br /> TPHg 9/1999 Soil P3-10 60 NA <br /> TPHd 9/1999 Soil P1-5 110 NA <br /> TPHmo 2/1999 Soil Piping 4 92 NA <br /> MTBE 8/1999 Soil P3-10 32 NA <br /> TBA 8/1999 Soil P3-10 <5 NA <br /> Benzene 10/2003 Soil P10-15 0.092 NA <br /> Toluene 2/1999 Soil SP-1A/1B 0.76 NA <br /> Ethlybenzene 2/1999 Soil SP-1A/1B 1.8 NA <br /> Total Xylenes 2/1999 Soil SP-1A/1B 16 NA <br /> Notes: <br /> TPHg/GRO = Total petroleum hydrocarbons as gasoline or gasoline-range organics <br /> TPHd/DRO =Total petroleum hydrocarbons as diesel or diesel-range organics <br /> TPHmo = Total petroleum hydrocarbons as motor oil or oil-range organics <br /> MTBE = Methyl tert-butyl ether <br /> TBA=tert-butyl alcohol <br /> NA/NE = Not applicable/not established <br /> Stantec <br /> 3.5 <br />