ARCHIVED REPORTS_2021 CURRENT CONDITIONS RPT

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24 May 2021 Project No. 14-3002 Page 7 of 23 On 01 January 2013, the Facility went into Reserve Shutdown (RS). This is an event where a unit is available for load but is not synchronized due to lack of demand. This type of event is sometimes referred to as an economy outage or economy shutdown. While the unit was on RS, maintenance work was performed. The Facility was never operated after it was declared in RS status. From the 10 July 2007 acquisition date by HPH, formerly known as Bicent Power LLC, to the date of RS, the Facility use was consistent with power generation operations and there were no recordable spills involving chemicals or petroleum products at the Site. In addition, all chemicals and petroleum products that were maintained and used at the Site were consistent with power generation operations. No equipment suspected of containing PCBs has been stored or used on the subject property. The property was not used as an on-site landfill and any solid and liquid wastes produced through business operations were disposed of in accordance with permits and laws. The southern portion of the Site consists of an open field with aged, weathered, broken glass (waste glass cullet), which can be viewed from both aerial and satellite photography (Appendix B). This material was present when the Site was acquired in 2007 by HPH. When HPH acquired the Site in 2007, it had no direct or observable knowledge of how the property was used, if any, by LOF/PNA. There were two transformer areas at the Facility, in the southwest corner and northwest area of the Facility. Both transformers were located within a concrete containment area. As stated above and according to the property owner, no equipment was suspected of containing PCBs. The likely source of PCBs at the Site is the solid waste disposed on the subject property by the former LOF/PNA facility. A historical site layout of the Facility, including transformer locations and identification of system equipment is included in Appendix C. A comprehensive background of the historical operations of the Facility, including wastewater disposal activities and injection well information is provided in the Site Historical Activity Report included in Appendix D. 2.8. CURRENT SITE ENVIRONMENTAL CONDITIONS PCB Aroclor 1254, dioxins and Pb were evaluated using the RSLs, and TPH were evaluated using the January 2019 California Regional Water Quality Control Board (CRWQCB) Environmental Screening Levels for commercial/industrial shallow soil exposure (ESLs). The RSLs and ESLs are listed below:  PCB Aroclor 1254 and total PCBs: 0.97 mg/kg.  Dioxins: 22 picograms per gram (pg/g).  Lead (Pb): 800 mg/kg.