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This letter from DTSC references the same "Preliminary Investigation for Surface and Subsurface Contamination of Soils and Groundwater Final Report" apparently prepared by Woodward Clyde Consultants (report not available for our review). The letter indicated that the next step in the remediation of the site is preparation of a draft Remedial Action Plan (RAP). They reference soil and groundwater sample analytical data; however, it was not included in the information provided. The Site Identification Form and Site Assessment Data Form (Attachment 3) indicated the site name as Libbey Owens Ford Company. The land owners were identified as General Motors Corporation/General Motors Building. The type of waste was identified as inert and industrial and the site was listed as an open dump. The waste disposal area is stated as 5 to 10 acres and the site is indicated as closed in 1986. A site visit was conducted in March 25, 1993 and surface conditions were indicated as "No cover or cap was used. Glass cullet sand and trace amounts of wood and metal banding are accumulated on site. No further dumping occurfing]." Attachment 3 indicated a SWAT has not been conducted, there is no groundwater monitoring program for the WDS; however, groundwater monitoring wells are located on site to monitor a potential plume from an adjacent industrial use facility (Simplot/BEST) based on agreement between Libbey Owens Ford and Simplot/BEST. The site was reported as not having a LFG monitoring or control system and notes on the attachment form state "Methane gas production unlikely given the waste streams and glass cutlet, banding metal (small amounts) and wood small amounts)." The site was reported as having no engineered lining system and no final cover. It was recommended that the site be inspected annually. A yellow sticky note included with the document has the following notes: "possible heavy metals, contamination from sand if used for blasting, metals scan of site! Cover in place!" Comments: A San Joaquin County Assessor's Parcel Map of the site and vicinity includes hand drawn information added to the parcel map indicating the location of the Libbey Owen Ford Plant and what appears to be a road coming into the site from the north of the plant building, then splitting to the west and east, with the road to the west continuing south and paralleling the plant building and terminating at a circular area identified as Disposal Area south of the building. This area appears to correlate with the waste disposal area as indicated in the 1993 historical aerial photograph. Ninyo&Moore 1 500 E.Louise Avenue,Lathrop,San Joaquin County,California 1 104690095 1 August 11,2017 16