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Table 2.1. Subject Properties Sampling and Rationale Summary DecisionSubject Property Sampling or Sous cte Emmak- r Historical-Dry cleaners(VOCs[solvents]) 1015 Depth--29 ft bgs(2013) Current-Auto junkyard(TPH&Metals) •Located at 742 E.Main St, Stockton, 1 15120209 Stoc E Market Street Soil •kton,CA 95205 Direction-east to Suspected Soil Historical-Railroad car loading/offloading,vacant lot(TPH& .Located at East Main Street and South Grant St. The potential presence of chlorinated solvents in northeast Metals) groundwater at Subject Property 1 from upgradient sources)represents a REC Historical-Dry cleaners(VOCs[solventsl) Current-Treclor trailer/vehicle parking yard(TPH&Metals) 'Located at 742 E.Main St. 2 15124002 1024 E Market Street Soil None Suspected Soil Historical-Railroad cer loading/offloading,vacant lot(TPH& •Located at East Main Street and South Grant St. Stockton,CA 95205 Metals) •The potential presence of chlorinated solvents in groundwater at Subject Property 1 from upgradient sources)represents a REC Historical-Dry cleaners(VOCs[solventsl) Current-Unpaved road and parking •Located at 742 E.Main St. 3 15124071 2018 Union Street Soil None Suspected Soil Historical-Railroad car loading/offloading,vehicle parking(TPH •Located at East Main Street and South Grant St. Stockton,CA 95205 &Metals) •The potential presence of chlorinated solvents in groundwater at Subject Property 2 from upgradient source(,)represents a REC Current-Tmctor Trailer and vehicle parking 4 15124067 1037 E Lafayette Street None None None Historical-Railroad car loading/offloading,vehicle parking None Stockton,CA 95205 Current Phase 1 did not identify any RECs CRECs or HRECs for this Subject Property Current-T"ctor Trailer and vehicle parking 5 15124068 1037 E Lafayette Street None None None Historical-Railroad car loading/offloading,vehicle parking None Stockton,CA 95205 Current Phase 1 did not identify any RECs CRECs or HRECs for this Subject Property Current-Tmctor Trailer and vehicle parking 6 15124070 233 S Union Street None None None Historical-Railroad car loading/offloading,vehicle parking None Stockton,CA 95205 Current Phase 1 did not identify any REC,CRECs or HRECs for this Subject Property Historical-Foundary located 300-ft west(Metals) 1038 E Lafayette Street Current-Vacant Lot •Information source:Sanborn 1917. 7 15126003 Stockton,CA 95205 Soil None Suspected Soil Historical-Vacant Lot •Located at 400 Aurora St S. •The potential for aerial deposition of metals from an off- site adjacent historical foundry represents a REC. Historical-Foundary located 300-ft west(Metals) •Information source:Sanborn 1917. •Located at 400 Aurore St S. 321 S Union Street Current-Auto junkyard(TPH&Metals) •The potential for aerial deposition of metals from an off- 8 15126004 Stockton,CA 95205 Soil None Suspected Soil Historical-Railroad car loading/offloading operations site but adjacent historical foundry represents a REC. •Aerial photographs shown darkened soils across most of the Subject Property.The darkened soil may be due to a release of petroleum products(TPH)and the 34-year duration of this condition represents a REC. Historical-Woodworking Dip Tank located 300-ft west. (VOCs,SVOCs,Metals)) Depth--49-54 ft bgs Current-Auto garage/junkyard(TPH&Metals) •Information source:Sanborn 1972. 9 15126034 1 to E Sonora Street Soil (1995) Suspected Soil Historical-Railroad car loading/offloading operations,oil shed •Located at 418 Aurora SI S. Stockton,CA 95205 Direction-northeast (TPH) •The current use as an automobile junkyard is considered a REC. •The presence of an oil water separator located south of the building is considered a REC. Potential GW impacts(BTEX,TPH)from Project Site 11. located at 1021 Hazelton Ave. Additional Historical-Woodworking Dip Tank located 300-ft west.(VOCs,SVOCs,Metals) 1031 E Church Street Current-Auto garage/junkyard(TPH&Metals) •Information source:Sanborn 1972. 10 15126035 Stockton,CA 95205 Soil None Suspected Soil Historical-Railroad car loading/offloading(TPH) •Located at 418 Aurore St S. •The Subject Property has been used as an automotive repair facility for over 50 years with violations for improper material storage in 2019.In addition,the Subject Property is currently used for storage of vehicles and tires.These conditions are considered RECs. •The northwestern portion of Subject Property 11 was equipped with USTs with a total capacity of 13,000 gallons which were likely filled by tanker cars from the adjoining railroad tracks to the west. •In 2018'a Phase II ESA was conducted and located the tank holds of the former tanks in the northwesternportion of the Subject Property.Total petroleum hydrocarbons(TPH)- 1021/1025 E Hazelton Avenue Current-Auto repair,Gasoline Service Station,Paint Shop(BTEX diesel was detected at a concentration of 8,700 milligrams 11 15128003 Stockton,CA 95205 Soil None Suspected Soil 8,TPH) per kilogram(mg/Kg)in the soil boring drilled at the location Historical-Former LUSTS,Paint shop(TPH,SVOCs,VOCs) of the former tanks.The Phase II ESA stated that the soil Impacts appear limited in extent and will continue to biodegrade over time.The known presence of TPH-diesel is a REC. •A gas and service station was located at the southern portion of the Subject Property,suggesting the presence of another UST.The potential presence of a UST in the southern portion of the Subject Property is also a REC. Current-Vacant lot 12 15128004 501 S Union Street None None Soil Historical-Rail loading(TPH) Historical Phase 1 and Phase II performed in 2018 Stockton,CA 95205 Current Phase 1 did not identify any RECs CRECs or HRECs for indicated limited impact to soil. this Subject Property Current-Vacant lot Historical-The 1917,1950 and 1972 Sanborn maps show three 1022 E Hal Avenue fuel tanks in-ground under a platform with a total capacity of Historical-Adjacent Project Site 14 contained Former 13 15128038 Stockton,CA 95205 Soil None Suspected Soil 16,000 gallons.There are no records of the removal or LUSTS(TPH).Received an NFA. remediation associated with these fuel tanks.The likely presence Located at 1033 E Scotts Ave. of hydrocarbons in soil and/or groundwater from the documented fuel tanks is a REC.