The California Department of Toxic Substances Control (DTSC), pursuant to authority granted under California Health and Safety Code, division 20, chapter 6.5 and California Code of Regulations, title 22, division 4.5, Chapter 20, proposes to approve a Class 1* Permit Modification (Modification) for the HWF Permit. The purpose of the Modification is to address changes to the permitted boundary for the HWF due to the proposed sale of five parcels comprising of landscaped areas, roads and open space at the facility. This is an administrative boundary adjustment to the permitted facility with no indications that any contamination exists or has ever existed on the parcels being removed from the HWF permit. Raytheon Space and Airborne Systems (Raytheon) is a manufacturer and assembler of electronic components and accessories. It is also a registered Hazardous Waste Transporter. The facility is on an approximately 134-acre parcel of land zoned for commercial/manufacturing uses. The facility stores waste generated on site and on satellite facilities. On October 8, 2017, Raytheon’s HWF Permit expired, and Raytheon initiated closure of the HWF, however it still conducts short-term storage activities that are not subject to a DTSC-issued HWF Permit. The satellite facilities are located within a 160-mile radius of the facility. It is bordered on the west by Sepulveda Boulevard and on the opposite side of Sepulveda with Chevron Refinery Inc.; on the east by the Metro Blue-Line light rail- track; on the north by El Segundo Boulevard; and on the south by Hughes Way on which is Allied Chemical Corporation. It is approximately 1 mile south of the Los Angeles International Airport. No Solid Waste Management Units (SWMUs) or Areas of Concern (AOCs) were identified on these parcels during the "Environmental Priorities Initiative Preliminary Assessment" (PA) conducted in 1991, and DTSC did not identify any concerns with these parcels during its subsequent evaluations and in the Corrective Action Consent Agreement (CACA) that was executed in 2011. Given the use and location of these parcels, impacts to the subsurface from historical and current site operations are not anticipated.