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21 December 2017 AGE-Project No. 14-3154 Page 2 of 23 to the north and commercial trucking and buildings are located to the south. Highway 5 is situated approximately 1,000 feet west of the subject property. Several groundwater monitoring and remediation wells are installed in the southeast portion of the subject property associated with the current investigation and remediation of contaminated groundwater emanating from JR Simplot and the former Oxy Chem facilities to the east. Additionally, wells W-0, W-1R, and W-2 were installed at the subject property to monitor groundwater related to the past discharge/spray of treated waste water on the property and groundwater in the waste cells (W-0); wells W-0 and W-1R have been destroyed. The western portion of the subject property was historically utilized to store, manage/handle and dispose of waste glass and other minor debris from the processing of glass at the former PNA glass factory to the north. Specifically, a flat graded area in the northwest corner of the site was used to store waste glass (waste/glass handling area); in 2013, native soil to the east of the waste/glass handling area was used to cover the residual waste glass in this area. Investigations performed at the subject property in 2015 identified two additional areas along the western property boundary that contained buried waste glass and debris (North and South Waste Cell). As described in this report, the waste/glass handling area in the northwest corner of the subject property and the waste cells along the western property boundary have been thoroughly investigated and defined by investigations performed at the site. 3.0. BACKGROUND In the early 1960s, the Libby Owens Ford (LOF) facility (currently referred to as the former PNA facility) was built directly to the north of the subject property. The subject property was associated with the LOF facility, and historically waste glass and comparatively minor amounts of other debris (such as innocuous plastic and metal fragments) from the processing of raw glass at the LOF facility was stockpiled on the subject property at 17100 Murphy Parkway, Lathrop, California. An area that extends approximately 400 feet north to south and 500 feet east to west, in the northwest corner of the subject property was historically reported to support a large pile of glass waste where former glass debris was managed and stored on the surface prior to removal; no documented burial of waste was observed based on aerial photographs. A significant portion of wastes formerly stored at the subject property were removed throughout the facility’s operation and disposed off-site. In 1986, the handling of glass waste in the northwest portion (waste/glass handling area) of the site was terminated. In December 2013, cover (native soil) was placed over a relatively minor amount of residual waste glass that was present within the waste/glass handling area and this area was sloped for drainage.