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0, • <br /> Historic Soil Gas Analytical Data <br /> Parcel 2A and Adjacent Properties <br /> West Weber Avenue and Lincoln Streets <br /> Stockton, California <br /> TO-3 GC/FID To-15 GC/MS Full Scan ASTM D-1946 <br /> EPA Methods 82605 GC/TCD <br /> EPA Methods' 82605 <br /> Natural Gas <br /> TPH C2+HC's BTEX SVOCS Fuel Oxygenates Analysis <br /> (Ref.Gas) <br /> Casing LengN Dilution Ethyl- <br /> Sample or Depth(bgs) Factor Dale TPHg Benzene Toluene benzene Total Xylenes Naphthalene MTBE DIPE ETBE TBA TAME Methane Gas <br /> ID feet TO-15 Sampled (ug/m) (ug/m') (ug/m') (ug/m') (ug/m') (ug/m') (ug/m') (ug/m') (ug/m') (ug/m) (ug/m') ppmV <br /> Area 2A/2B And Adjacent Properties : :9/: <br /> 1 <br /> Trip Blank 9/18/2015 2 -10,000 <40 -200 -100 -100 <35 -100 c100 -100 -1,000 -100 <br /> (cont) t 12115/2018 z <to,000 <ao -zoo -100 -too <3s -100 -100 -100 <1,000 -too -1,00 <br /> 00 <br /> 1 12/16/2015 2 -10,0 <a0 -200 -100 <100 <35 -100 <100 -100 <1,000 -100 <1,000 <br /> -100 <100 <35 -100 <100 -100 -1,000 -100 <1,000 <br /> -200` -100 -100 <35 <100 -100 <100 <11,000 -100 -1,000 <br /> Explanation: <br /> logs ground surface TBA =Tertiary-Butyl Alcohol 3 =Summa Cannister collected and duplicate sample analyzed by <br /> TAME =Tertiary-Amyl-Methyl-Ether Calscience Environmental laboratories <br /> ppmV =parts per million by volume <br /> =micrograms per cubic meter BTEX =Benzene,Toluene,Elhylbenzene,Xylenes =Sample was contaminated following leak check analysis with 1,1 <br /> a Di0ouroethane.Thhee sample was discarded and a duplicate sample <br /> pg/m' <br /> TPHg =Total petroleum hydrocarbons in gasoline range organics SVOCs =Semi-Volatile Organic Compounds was re ran in was s. <br /> = < =Less than method reporting limit 5 =DPE system was shut dawn on October 16,2013. <br /> MTBE Methyl Tertiary-Butyl-Ether <br /> DIPE =Di-Isopropyl Ether ESL =Environmental Screening Levels 6 =Well installed February 2015 <br /> ETBE =Ethyl-Tertiary-Butyl-Ether NS =Not Sampled during this quarter 7 =Not typical gasoline pattern <br /> 1 =Samples analyzed by Air Toxics Ltd.under specified EPA <br /> 2 =Samples analyzed by TEG under specified EPA Methods <br /> Page 23 of 23 <br />