ARCHIVED REPORTS_2019 SOIL MGMT PLAN (JULY-REVISED)

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22 February 2019 AGE-Project No. 14-3154 Page 3 of 12 groundwater. The investigations included geophysical survey work; advancement of borings and excavation of trenches for sample collection (soil, water, and solid waste); collection of soil-gas samples; and excavations to remove identified waste. Analytical results of all soil, solid waste, groundwater, and soil-gas samples collected at Parcel B are summarized in Tables 1 through 8. It is anticipated that the small area of WU1 wastes beneath Parcel A is of similar character and composition as the wastes that were extensively characterized to the south beneath Parcel B. All work on the southerly adjoining Parcel B was performed in accordance with directives issued by the LEA at the EHD and/or the CVRWQCB, or with approval of the LEA and CVRWQCB. The LEA is certified by CalRecycle (formerly California Integrated Waste Management Board: CIWMB) to enforce state and local solid waste laws and regulations within its jurisdiction in the County; LEA staff was onsite to witness most of the field work performed. Extensive background information on the Former PNA Facility and detailed information about WU1 were provided in the following reports. • Clean Closure Plan dated 20 June 2018. • Site Assessment Summary Report – Final dated 21 June 2018. • Addendum to the Request for Exemption to Implement Construction Controls dated 12 July 2018. • Verification Report dated December 14, 2018. 5.0. SITE INFORMATION The subject property (Parcel A) has a physical address of 500 East Louise Avenue, Lathrop, California, and is located on the south side of East Louise Avenue approximately 400 feet east of the intersection of East Louise Avenue and Harlan Road. The property includes one mostly-rectangular parcel totaling approximately 117 acres (APN: 198-120- 08) and is located within a mixed residential, commercial and industrial area of the city of Lathrop, San Joaquin County, California. As shown in Figure 3, the residual disposal area WU1 on Parcel A is estimated to be approximately 0.14 to 0.28 acres within SWIS 39- CR-0022 (the exact extent of WU1 on Parcel A will be determined during excavation and removal activities). The Former PNA Facility includes a large warehouse structure formerly utilized for manufacturing glass, two smaller stand-alone warehouse structures, a sanitation plant, stormwater reservoir, irrigation lawns and asphalt parking areas. Parcel maps indicating the subject property location, surrounding parcels and structures, and the legal description of the property are included in Appendix C. The Former PNA Facility is bordered to the west by a vacant field and a McDonalds restaurant, to the south by the former San Joaquin County Cogeneration Power Plant