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Cleanup in Vulnerable Communities'Initiative Discovery Project Reference:Favorite Cleaners and Enforcement Discovery Investigation Work Plan Project Number:60688620 2.3 Subject Property Physical and Environmental Characteristics The information presented in the following subsections is from the Phase I ESA for Favorite Cleaners(AECOM 2022b), EDR report, and independent confirmation and research conducted by Wanda Farmer. 2.3.1 Topography According to the United States Geological Survey(USGS)topographic map of the Subject Property(Stockton West, CA quadrangle)and a review of Geocheck Physical Setting in the EDR report, the elevation of the Subject Property is approximately 17 feet above mean sea level (msl). Based on a review of these technical resources and AECOM's site visit,the Subject Property appears to be generally flat with a slight upward slope toward the east. 2.3.2 Geology and Soil Types According to the environmental database report,the Subject Property is underlain with silt-clay and clayey soils. The San Joaquin soils are described as having very slow infiltration rates and as being somewhat poorly drained.These soils are further described as clay to approximately 33 inches below ground surface(bgs),followed by indurated and stratified sandy to clay loam to approximately 46 inches bgs.According to geologic information provided in the EDR report,the bedrock geology of the Subject Property is of the Cenozoic Era, Quaternary System, Quaternary Series with a Stratified Sequence. 2.3.3 Hydrogeologic Setting The Subject Property is located within the San Joaquin Valley—Kings groundwater basin, in the San Joaquin Valley Tulare Lake subbasin inside the Sacramento Valley.Within 1 mile of the subject property are 28 wells,the majority of which are monitoring wells,with one agricultural well.According to information provided by the California State Water Resources Control Board (SWRCB)online GeoTracker database(SWRCB 2023), depth to groundwater measured at the Super Center Mart(T0607700802)site located at 641 E. Charter Way, approximately 270 feet to the north of the Subject Property,was measured at depth of approximately 27 to 31 feet bgs in 2015 and the groundwater flow direction was noted as variable to northeast, east, and southeast directions. It should be noted that the actual depth and flow direction of groundwater beneath the Subject Property cannot be determined without site-specific groundwater monitoring well data. According to Federal Emergency Management Agency(FEMA) information (Map Panel 06077CO46OF effective 11/2/2018)available online on the FEMAwebsite(FEMA Flood Map Service Center I Search by Address), the Subject Property is not within a 100-year flood zone, but it is within 400 feet from an area of reduced flood risk due to levee. 2.3.4 Climatological Setting The Subject Property is located in Stockton, CA, which has an and climate characterized by hot summers, short cool winters, and sparse precipitation.Temperatures in the area rarely exceed 95 degrees Fahrenheit(°F)during summer months,with an annual average daily temperature of approximately 627.Annual rainfall average is 5.78 inches. Nearly all rainfall occurs between November and April, while some thundershowers occur during summer months. Prevailing wind direction is southwesterly. 2.4 Current and Historical Land Uses Historically,the Subject Property was used for residential uses until approximately 1969 when commercial building construction started.The Subject Property was built in 1940 and operated as a dry cleaner from 1970 until 2010, per city directories, EDR reports, and an interview with an owner. Favorite Cleaners has documented waste manifest from 1998 to 2000 transporting and disposing of tetrachloroethylene(PCE).The cleaners waste profile for John Koh was issue an EPA ID CAD981638612 in July 1987 to June 2004 (inactive)and was updated in April 2005. The cleaners then applied for EDA ID#Ca1000229637 under Siyop Hong and was active from March 2005 until June 2010 Development appears to be residential to the southwest, south, and southeast of the Subject Property. Commercial along E. Charter Way with several gas stations,tire shops, and used auto sales from 2010 to present. In the 1940s commercial and residential development was present in all directions surrounding the Subject Property. Development increased in the time between 1950 and 1970. Residential and commercial development in the surrounding area continued to present day. Prepared for: California Department of Toxic Substances Control AECOM 8