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2 June 2020 Buzz Oates Development & Construction Services Attn: Troy Estacio 555 Capital Mall, Ninth Floor Sacramento, CA, 95814 VERIFICATION REPORT WASTE MATERIALS MANAGEMENT WASTE UNIT 1, MURPHY PARKWAY PROPERTY, APN 198-120-09, 17100 MURPHY PARKWAY, LATHROP, SAN JOAQUIN COUNTY Staff of the Central Valley Regional Water Quality Control Board (Regional Water Board) have reviewed the report dated 14 December 2018 Verification Report Waste Materials Management – Waste Unit 1 (Report) for the Murphy Parkway Property located at 17100 Murphy Parkway, Parcel B, APN 198-120-09 (Site), and submitted on your behalf by Brusca Associates, Inc. (BAI). The Report documents the waste management work performed at the site from April through December 2018 in preparation for project closure and site redevelopment. Waste management work included excavation/removal, stockpiling, sampling, laboratory testing, and onsite reuse of solid waste material and associated soils located beneath a clean soil cap on the far northwesterly portion of the parcel known as Waste Unit 1 (WU1). The Site has been redeveloped an approximate 870,000 square-foot commercial building structure for warehouse distribution purposes. The waste management work is a component of clean closure activities in accordance with CCR Title 27, Section 21810 and with the guidance outlined in the Local Enforcement Agency (LEA) Advisory #16 published by CalRecycle. The site Clean Closure Plan dated 20 June 2018 was submitted by AGE and approved by the LEA in a letter dated 19 July 2018. Regional Water Board’s concurrence with the site Clean Closure Plan was issued in its 21 November 2018 letter. This Report summarizes the results from the Excavation and Material Management Plan (EMMP) that describes the procedures for the removal, management, sampling, testing, and evaluation of residual solid waste materials from WU1. Brusca Associates provided the 22 March 2018 Addendum to the EMMP to revise the verification and soil sampling protocols for the testing of soils beneath the area of removed wastes.