ARCHIVED REPORTS_2019 SOIL MGMT PLAN (MAY)

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ekienvironment & water water feature in the vicinity of the Site is the San Joaquin River located approximately 1.5 miles to the west. 1.3 Environmental Conditions 1.3.1 Previous Environmental Investigations and Remediation Previous environmental investigations and remediation at the Site have been conducted under the oversight of the San Joaquin County Environmental Health Department ("EHD"), the RWQCB, and/or CalRecycle. The identified areas with known or suspected environmental impacts associated with the former PNA glass making operations are summarized below and are shown on Figure 1-2. • Waste Unit 1 ("WU1"): The property at 17100 Murphy Parkway (Parcel Number 198- 120-09), referred to herein as "Parcel B" is located immediately to the south/southwest of the Site (Figure 1-2 — Appendix B). The western portion of Parcel B was historically used as a disposal facility for waste glass, glass -making materials and rubbish from the former PNA operations on the Site (AGE, 2018a). The disposal facility was designated as SWIS 39 -CR -0022 in 1993, and within SWIS 39 -CR -0022 there are three subareas, one of which was a capped landfill area containing glass cullet (small pieces of broken glass that could be and were reused/recycled in the manufacturing process). It is referred to here as WU1 and was located in the northwest corner of Parcel B along the southern boundary of the Former PNA Site separate and apart from the North and South Waste Cells discussed below (Figure 1-2). Excavation and removal of glass cullet from the portion of WU1 located on Parcel B was completed in April 2018 in accordance with the Excavation and Material Management Plan ("EMMP"), dated 9 Mary 2018 (BAI, 2018a)(Appendix B) and the EMMP addendum, dated 22 March 2018 (BAI, 2018b). Extensive analyses of materials from WU1 demonstrated that the landfilled material was not hazardous and the excavated material was utilized in the foundation of the building constructed on Parcel B (analytical data are summarized in Appendix Q. • Waste Unit 1 Sliver ("WU1 Sliver"): During excavation of WU1 on Parcel B, it was determined that a sliver of WU1, also located within SWIS 39 -CR -0022 extended to the north onto the Former PNA Site (Figure 1-2). The WU1 Sliver extends approximately 25 to 35 feet onto the Former PNA Site and is approximately 250 to 350 feet long (AGE, 2019). A WU1 Clean Closure Plan and Work Plan Addendum ("WU1 Plan Addendum"), dated 22 February 2019 (AGE, 2019), was conditionally approved by the RWQCB on 15 March 2019. In late March 2019, and in accordance with the WU1 Plan Addendum (Appendix B), soil/waste material was excavated from the WU1 Sliver and stockpiled for reuse at the Site. • North and South Waste Cells: The third subarea within SWIS 39 -CR -0022 contained two deep waste pits or cells containing waste glass, rubbish and other materials located on the western boundary of Parcel B. They have been designated as the North and South