ARCHIVED REPORTS_2019 SOIL MGMT PLAN (JULY-REVISED)

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Brusca File No. 137-002 Page 3 May 23, 2018 Murphy Parkway Property Waste Materials Reuse Workplan 2.0 SITE DESCRIPTION AND BACKGROUND 2.1 Site Location and Description The approximate 48-acre subject property is located about 500 feet easterly of Murphy Parkway and about 1,000 feet northerly of D’Arcy Parkway in a commercial and industrial area of Lathrop, San Joaquin County, California. The property consists of an approximate 48-acre parcel identified as APN 198-120-009. The subject parcel is currently vacant/undeveloped land. The site is generally flat; however, two depressed areas are situated on the northwesterly portion of the site (bordering the WU1 area). Until recently, portions of the site were used for livestock grazing; wire fencing is in place on portions of the site for livestock enclosure purposes. A Vicinity Map showing the location of the property is presented as Plate 1, and a Site Map is presented as Plate 2. 2.2 Historical Site Activities The 48-acre subject parcel historically was vacant farmland. In the early 1960s, a large glass manufacturing facility (currently referred to as former Pilkington North America [PNA] facility) was constructed directly northerly of the subject property. The subject 48-acre parcel (identified by APN 198-120-009) was associated with the former PNA facility, and, along with other offsite areas, was used for solid waste handling and waste water disposal related to the PNA facility. Solid wastes comprised largely of waste glass materials were handled within the northwesterly portion of the subject 48-acre site; the vast majority of waste glass materials historically handled and temporarily stored in this area were hauled from the property in the past to offsite disposal locations. Glass manufacturing activities at the former PNA facility were discontinued several years ago. In recent years, the subject 48-acre parcel generally has been unused, except for some livestock grazing. Treated industrial and domestic waste water, as well as storm water, generated at the former PNA facility northerly of the subject property was disposed at that facility, and also on the subject 48-acre parcel via spray irrigation. The waste water discharge was performed under permit with the CVRWQCB. Because the subject 48-acre property is no longer intended for waste water discharge, the CVRWQCB is currently in the process of removing this area from the waste water discharge permit. 2.3 Past Onsite Waste Investigations and Remedial Work It is indicated that the handling of glass wastes on the subject property ceased in the 1980s. Around 2012, the local oversight agency (the SJCEHD) required the placement of a clean soil cap over the northwesterly portion of the property (WU1 area) where a thin layer of residual glass wastes was known to exist at the site surface. A Soil Cover Workplan was prepared in early 2013, and the capping work was implemented in late 2013.8 The area of the cap (WU1 area) is shown on Plate 2. 8 Antea Group; “Soil Cover Workplan, Former Cullet Staging Area, Pilkington North America, Inc., 500 East Louise Avenue, Lathrop, California”; May 22, 2013.