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PARTNER June 15, 2022 San Joaquin County Environmental Health 1868 East Hazelton Avenue Stockton, California 95205 Subject: Investigation Workplan 1301 East Lockeford Street Lodi, California 95240 Project Number 22-360172.15 To Whom it May Concern: Partner Engineering and Science, Inc.(Partner) is pleased to submit this Workplan to provide environmental services for the above-referenced property. Project History Partner completed a Phase I Environmental Site Assessment Report(Phase 1) for the subject property, dated March 18,2022,on behalf of STORE Capital. Based on the information reviewed and the site reconnaissance, the subject property consists of one parcel of land comprising approximately 2.84 acres located on the north side of East Lockeford Street within a mixed residential and industrial area of Lodi,San Joaquin County, California. The subject property is currently developed with two single-story buildings, which were constructed in 1962 and 1969. The subject property is currently occupied by Calpine Containers Inc. for industrial use. On-site operations consist of shipping, receiving, and assembly of cardboard boxes, and office operations. The southern building is developed with an office on the south end and a maintenance shop on the southwestern portion. Stored cardboard boxes, wooden pallets, and other materials are stored in the buildings and throughout the subject property. In addition to the current structures, the subject property is improved with a 499-gallon propane aboveground storage tank (AST) on the eastern portion.A former 550-gallon underground storage tank (UST) was located on the subject property. A railroad spur is present on the southern portion of the subject property. According to available historical sources,the subject property was undeveloped land as early as 1908/1910 and was agricultural land from at least 1937 until 1957.The subject property was improved with the current structures in 1962 and 1969. Calpine Containers, Inc. has been the only tenant since initial construction. The following recognized environmental condition (REQ was identified in the Phase I: • Based on Partner's historical and regulatory review, hazardous wastes were formerly generated at the subject property from vehicle maintenance operations. A parts washer, which used chlorinated solvents,was previously located in the maintenance room on the southwestern portion of the subject property. According to subject property personnel, hazardous waste generation ceased in 2008. Therefore, the historical use of PCE on the subject property represent a REC. Based on available information from a previous investigation at the subject property, groundwater beneath the subject property is anticipated to be first encountered at approximately 35 bgs with variable flow