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Brusca File No. 137-002 <br /> <br />Page 2 <br />August 10, 2017 <br />Murphy Parkway Property Soil Gas Monitoring Workplan <br /> <br /> <br />SITE DESCRIPTION AND BACKGROUND <br /> <br />Site Location and Description <br /> <br />The approximate 48-acre subject property is located about 500 feet easterly of Murphy Parkway <br />and about 1,500 feet southerly of East Louise Avenue in a commercial and industrial area of <br />Lathrop, San Joaquin County, California. The subject property is currently vacant/undeveloped <br />land. The site is generally flat; however, portions of the site are irregular and hummocky, and two <br />depressed areas are situated on the northwesterly portion of the site. Portions of the site are <br />currently used for livestock grazing; wire fencing is in place on portions of the site for livestock <br />enclosure purposes. A Vicinity Map showing the location of the property is presented as Plate 1, <br />and a Site Map is presented as Plate 2. <br /> <br />Historical Site Activities <br /> <br />The subject property historically was vacant farmland. In the early 1960s, a large glass <br />manufacturing facility (currently referred to as former Pilkington North America [PNA] facility) <br />was constructed directly northerly of the subject property. The subject property was associated <br />with the former PNA facility, and was used for solid waste handling and waste water disposal <br />related to the PNA facility. Solid wastes comprised largely of waste glass materials were <br />handled within the northwesterly portion of the subject 48-acre site. Glass manufacturing <br />activities at the former PNA facility were discontinued a few years ago. In recent years, the <br />subject 48-acre site generally has been unused, except for some livestock grazing. <br /> <br />Industrial and domestic waste water generated at the former PNA facility northerly of the subject <br />property was treated at that site, and disposed at that facility, and also on the subject 48-acre <br />property via spray irrigation. The treated waste water discharge was performed under permit with <br />the Central Valley Regional Water Quality Control Board (CVRWQCB). Because the subject <br />48-acre property is no longer intended for waste water discharge, the CVRWQCB is currently <br />considering removing this area from the waste water discharge permit. <br /> <br />Past Onsite Waste Investigations and Remedial Work <br /> <br />It is indicated that the handling of glass wastes on the subject property ceased in the 1980s. <br />Around 2012, the local oversight agency (SJCEHD) required the placement of a soil cap over the <br />northwesterly portion of the property where residual glass wastes were known to exist. A Soil <br />Cover Workplan was prepared in early 2013, and the capping work was implemented in late <br />2013.1 The general area of the cap is shown on Plate 2. <br /> <br />In 2014 and 2015, a substantial amount of investigation and waste characterization was <br />performed on the subject property by AGE; the results were presented in a report dated June 15, <br />2016.2 The 2014 and 2015 investigative work was performed to evaluate the limits and nature of <br /> <br />1 Antea Group; “Soil Cover Workplan, Former Cullet Staging Area, Pilkington North America, Inc., 500 East <br />Louise Avenue, Lathrop, California”; May 22, 2013. <br />2 Advanced GeoEnvironmental, Inc.; “Summary of SWIS Investigation, Waste Characterization/Disposal, Former <br />Pilkington North America – Lathrop Facility, 17100 Murphy Parkway, Lathrop, San Joaquin County, Solid Waste <br />Information System (SWIS) Number 39-CR-0022”; June 15, 2017.