ARCHIVED REPORTS THIRD QUARTER GROUNDWATER MONITORING REPORT AUGUST 2015

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CONDOR EARTH TECHNOLOGIES,INC. 188 Frank West Circle,Suite I Stockton,CA 95206 Phone 209.234.0518 Fax 209.234.0538 CONDORwww.condorearth.com ' October 21,2015 Condor Project No. 7064B THIRD QUARTER(SEMI-ANNUAL) GROUNDWATER MONITORING REPORT AUGUST 2015 ' Site Address: Former Pilkington North America,Inc. (Site) 500 East Louise Avenue ' Lathrop, California Client: Carey Andre ' Jones Development Company,LLC 500 East Louise Avenue Lathrop, Califomia 95330 Primary Agency: Gerald Djuth, California Regional Water Quality Control Board (CRWQCB) Ann Palmer, CRWQCB ' Copy to: Adrienne Eltsaesser, San Joaquin County Environmental Health Department (SJCEHD) t During the third quarter of 2015, Condor Earth Technologies, Inc. (Condor) conducted a semi-annual groundwater monitoring event and remediation activities consisting of diesel skimming operations at the above-referenced Site (Figure 1, Attachment A). This report contains a summary of the diesel product ' removal data and results of the third quarter 2015 groundwater monitoring event conducted in August 2015. Report attachments include figures indicating the Site location and groundwater gradient, diesel isopach maps, and cumulative gallons of diesel removed from the Site recovery wells (Attachment A); ' Site background information (Attachment B); historic monitoring and diesel product removal data (Attachment C); field forms(Attachment D); and current laboratory analytical results(Attachment E). ' Third Quarter Groundwater Monitoring Event Summary(August 21,2015) On August 21, 2015, a Condor representative measured the depth to groundwater, recorded field observations, and collected groundwater samples from the three monitoring wells (MW-1 through MW-3) ' and collected groundwater samples from two of the four facility sumps (SE-sump and SW-sump) (Figure 2, Attachment A). The average groundwater elevation in the three Site monitoring wells on August 21, 2015, was 0.43 feet, a decrease of 1.40 feet since previously measured on February 9, 2015. The calculated groundwater gradient was approximately 0.0033 feet per foot (ft/ft)to the east-northeast. Total petroleum hydrocarbons quantified as diesel (TPH-D), kerosene(TPH-K),and(TPH-MO) motor oil ' were not detected at or above the laboratory reported detection limits in MW-2, MW-3, and the SW-sump. Total petroleum hydrocarbons quantified as diesel were detected above the laboratory reported detection limits in MW-1 and the SE-sump. Motor oil was also detected above the laboratory reported detection limits in MW-1. 1