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PARTNER April 26, 2022 San Joaquin County Environmental Health 1868 East Hazelton Avenue Stockton, California 95205 Subject: Phase II Subsurface Investigation Workplan Dollar General 2150 West Alpine Avenue Stockton, California 95204 Dear Ms. Baca: Partner Engineering and Science, Inc. (Partner) is pleased to submit this workplan for the above-referenced property. Project History Partner completed a Draft Phase I Environmental Site Assessment Report (Phase 1) for the subject property, dated April 14, 2022, on behalf of Exchange Right Real Estate, LLC. Based on the information reviewed and the site reconnaissance, the subject property consists of three parcels of land comprising approximately 1.61 acres located on the southwest corner of the West Alpine Avenue and Franklin Avenue intersection within a mixed commercial and residential area of Stockton, San Joaquin County, California. The subject property is currently developed with a single-story building, which was originally constructed in 1955 and renovated in 2012.The subject property is currently occupied by Dollar General for commercial use.On-site operations consist of the sale of household consumer goods. In addition to the current structure,the subject property is also improved with a large asphalt-paved parking lot. According to available historical sources, the subject property was undeveloped or possibly developed for agricultural use until 1954.An apparent residence and several outbuildings were evident by as early as 1949; these structures appear to have been demolished sometime between 1949 and 1955, when the existing building was constructed as a multi-tenant store. The building appears to have remained in this use until 2012 when the building was renovated into the current single-tenant store (Dollar General). The following recognized environmental condition (REC) was identified in the Phase I: • According to the historical review, the subject property was formerly used by dry cleaning tenant, Hess Du Bois Cleaners, that occupied the subject property from approximately 1955 to 1965 at 2156 West Alpine Avenue (a former on-site address). Dry cleaning operations typically use chlorinated solvents, particularly tetra chIoroethylene (PCE), during the dry cleaning process.These solvents, even when properly stored and disposed of, can be released from these facilities in small,frequent releases through floor drains, cracked concrete, and sewer systems. Chlorinated solvents are highly mobile chemicals that can easily accumulate in the soil and migrate to the groundwater beneath a facility. Partner was unable to identify records pertaining to the exact nature of the on-site operations during this time. Based on the potential for dry cleaning facilities to impact the subsurface, the duration of dry cleaning operations on-site (at least 10 years), the lack of previous subsurface investigations 00 www.PARTNEResi.com :11419-4923