ARCHIVED REPORTS_2014 PRELIMINARY SITE ASSESSMENT RPT

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Advanced GeoEnvironmental, Inc . 837 Shaw Road • Stockton, CA 95215 Telephone (209) 467-1006 • Fax (209) 467-1118 24 December 2014 AGE Project No. 14-3154 Mr. Dana G. Parry REYNOLDS & BROWN 1200 Concord Avenue, Suite 200 Concord, CA 94520 Subject: Preliminary Site Assessment Report PILKINGTON NORTH AMERICA – LATROP FACILITY 500 EAST LOUISE AVENUE, LATHROP, CALIFORNIA Dear Mr. Parry: At your request, Advanced GeoEnvironmental, Inc. (AGE) has prepared this Preliminary Site Assessment Report for the property located at 500 East Louise Avenue, Lathrop, California (site) The scope of work includes advancement of seven (7) soil probe borings for the collection of soil samples and water samples to evaluate the presence and define the type or extent of petroleum hydrocarbon-impacted near the fuel oil tank spill areas, southwest and southeast of the electrical substation. Investigation of potentially metals- impacted soil or groundwater, which includes advancement of 14 soil probe borings for the collection of soil samples and water samples at the sites where former glass debris and dust waste streams were managed or disposed and/or were surface water features appear to have been comingled with waste. Based on PNA Lathrop facility Recognized Environmental Conditions (REC), the following items have been evaluated: The presents of water quality degrading chemicals within the shallow upper aquifer, within an area of the property; former glass debris and dust waste streams on the southwestern portion of the property; a report of a 1985 straw oil line leak at a historical above ground storage tank (AST), at the south edge of the property which reportedly in 1986 underwent investigation; a report of a 1992 fuel oil leak from an AST, at the west side of the on-site transformer station on the property which reportedly underwent investigation and excavation.