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Onsite (Current and Historical Use) Offsite (Current and Historical Use) 1 15120209 1015 E Market Street Stockton, CA 95205 Soil Depth - ~29 ft bgs (2013) Direction - east to northeast Suspected Soil Current - Auto junkyard (TPH & Metals) Historical - Railroad car loading/offloading, vacant lot (TPH & Metals) Historical - Dry cleaners (VOCs [solvents]) • Located at 742 E. Main St. • Located at East Main Street and South Grant St. • The potential presence of chlorinated solvents in groundwater at Subject Property 1 from upgradient source(s) represents a REC 2 15124002 1024 E Market Street Stockton, CA 95205 Soil None Suspected Soil Current - Tractor trailer / vehicle parking yard (TPH & Metals) Historical - Railroad car loading / offloading, vacant lot (TPH & Metals) Historical - Dry cleaners (VOCs [solvents]) • Located at 742 E. Main St. • Located at East Main Street and South Grant St. • The potential presence of chlorinated solvents in groundwater at Subject Property 1 from upgradient source(s) represents a REC 3 15124071 201 S Union Street Stockton, CA 95205 Soil None Suspected Soil Current - Unpaved road and parking Historical - Railroad car loading/offloading, vehicle parking (TPH & Metals) Historical - Dry cleaners (VOCs [solvents]) • Located at 742 E. Main St. • Located at East Main Street and South Grant St. • The potential presence of chlorinated solvents in groundwater at Subject Property 2 from upgradient source(s) represents a REC 4 15124067 1037 E Lafayette Street Stockton, CA 95205 None None None Current - Tractor Trailer and vehicle parking Historical - Railroad car loading/offloading, vehicle parking Current Phase 1 did not identify any RECs CRECs or HRECs for this Subject Property None 5 15124068 1037 E Lafayette Street Stockton, CA 95205 None None None Current - Tractor Trailer and vehicle parking Historical - Railroad car loading/offloading, vehicle parking Current Phase 1 did not identify any RECs CRECs or HRECs for this Subject Property None 6 15124070 233 S Union Street Stockton, CA 95205 None None None Current - Tractor Trailer and vehicle parking Historical - Railroad car loading/offloading, vehicle parking Current Phase 1 did not identify any RECs CRECs or HRECs for this Subject Property None 7 15126003 1038 E Lafayette Street Stockton, CA 95205 Soil None Suspected Soil Current - Vacant Lot Historical - Vacant Lot Historical - Foundary located 300-ft west (Metals) • Information source: Sanborn 1917. • Located at 400 Aurora St S. • The potential for aerial deposition of metals from an off- site adjacent historical foundry represents a REC. 8 15126004 321 S Union Street Stockton, CA 95205 Soil None Suspected Soil Current - Auto junkyard (TPH & Metals) Historical - Railroad car loading/offloading operations Historical - Foundary located 300-ft west (Metals) • Information source: Sanborn 1917. • Located at 400 Aurora St S. • The potential for aerial deposition of metals from an off- 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. 9 15126034 1036 E Sonora Street Stockton, CA 95205 Soil Depth - ~49-54 ft bgs (1995) Direction - northeast Suspected Soil Current - Auto garage/ junkyard (TPH & Metals) Historical - Railroad car loading/offloading operations, oil shed (TPH) Historical - Woodworking Dip Tank located 300-ft west. (VOCs, SVOCs, Metals) • Information source: Sanborn 1972. • Located at 418 Aurora St S. • 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. 10 15126035 1031 E Church Street Stockton, CA 95205 Soil None Suspected Soil Current - Auto garage / junkyard (TPH & Metals) Historical - Railroad car loading/offloading (TPH) 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) • Information source: Sanborn 1972. • Located at 418 Aurora 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. 11 15128003 1021 / 1025 E Hazelton Avenue Stockton, CA 95205 Soil None Suspected Soil Current - Auto repair, Gasoline Service Station, Paint Shop (BTEX & TPH) Historical - Former LUSTs, Paint shop (TPH, SVOCs, VOCs) • 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 northwestern portion of the Subject Property. Total petroleum hydrocarbons (TPH)- diesel was detected at a concentration of 8,700 milligrams per kilogram (mg/Kg) in the soil boring drilled at the location 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. 12 15128004 501 S Union Street Stockton, CA 95205 None None Soil Current - Vacant lot Historical - Rail loading (TPH) Current Phase 1 did not identify any RECs CRECs or HRECs for this Subject Property Historical Phase 1 and Phase II performed in 2018 indicated limited impact to soil. 13 15128036 1022 E Hazelton Avenue Stockton, CA 95205 Soil None Suspected Soil Current - Vacant lot Historical - The 1917, 1950 and 1972 Sanborn maps show three fuel tanks in-ground under a platform with a total capacity of 16,000 gallons. There are no records of the removal or remediation associated with these fuel tanks. The likely presence of hydrocarbons in soil and/or groundwater from the documented fuel tanks is a REC. Historical - Adjacent Project Site 14 contained Former LUSTs (TPH). Received an NFA. • Located at 1033 E Scotts Ave. Table 2.1. Subject Properties Sampling and Rationale Summary Subject Property No. Property APN Address Sampling Recommendation Groundwater Information Known or Suspected Contamination Onsite Decision Rationale