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EXHIBIT C Regbnal Water Board letter dated December 17, 2018 M*'... Ikont,.l Water Boards Central Valley Regional Water Quality Control Board 17 December 2018 Troy Estaclo Buzz Oates Construction Company 555 Capital Drive Sacramento, Ca, 95814 COMFORT LETTER REGARDING PROPERTYAT FORMER PILKINGTON NORTH AMERICA, 17100 MURPHY PARKWAY (APN 198-120-090), L.A THROP, SAN JOAQUIN COUNTY California Central Valley Regional Water Quality Control Board (Regional Water Board) staff received your 5 AprIl 2017 C(ean Closure end Post Closure Land 1./se Plan (Closure Request) and responded in a 28 September 2018 staff letter Comments on Di -aft Request for Clean Closure and Proposed Post Closure Land Use Plan and subsequent letters in support of the path to closure for the site located at 17100 Murphy Parkway (APN 198-120-09) in Lathrop, San Joaquin County (the Site"). The approved closure Includes redevelopment of the property to maintain commercial/industrial land use by constructing a large warehouse (870000 square - foot) arid accompanying parking lot. The Site was formerly a part of the Former Plikington North America property located at 500 East Louise Ave and was recently purchased by Buzz Oates Construction, LLC to continue with the pianned redevelopment. The Site historically contained three unpermitted landfills that primarily received broken glass and other wastes generated by the former glass factory during manufacturing operations by the former Pilklrigton North America (PNA) and its predecessor Libby Owens Ford. Site investigations have Identified metals, total petroleum hydrocarbons, total dissolved solids polychlorinated biphenyis, semi -volatile organic compounds, dioxin and furans as constituents of concern, Each former landfill cell was excavated with approved confirmation sampling, waste disposal, and backfiillng with approved fill material. Two of the former landfill cells, located along the property boundary with the neIghboring San ,Joaquln Cogerieration Plant (SJCP), were defined, excavated and backililed to the property line leaving waste in place along their shared property line where the former North and South Waste Cells extend onto the SJCP property, Due to these two waste cells having walls on the property line with waste extending from tile property line into the neighboring former SJCP, the cells are not eligible for a No Further Action (NFA) letter until the waste Is addressed at the neighboring property. Regional Water Board staff have requested the neighboring property owner begin investigation of the waste cells extending onto their property for remediation. Regional Water Board staff are currently reviewing a work plan to begin site assessment field work at the SJCP. California Water Code section 13304 authorizes Regional Boards, among other provisions, to order any person who causes or permits waste to be discharged where it 'creates, or threatens to create, a condition of pollution or nuisance" to clean up the waste or abate the effects of the KAnt E. tOnaLly LcD. P5.. cnn,,, Ptnca PVt.IIPA, Ita.. ACU/A ,StYIcro T070 Au's C.A,4' 01Wa S200. Annen, Cbrd,v*. CA 05170 I wwc.na,.aso.tdS 0. oow'p.nttnIv, 0 us, c:t,o Pu P 5(5