ARCHIVED REPORTS FIRST QUARTER GROUNDWATER MONITORING REPORT FEBRUARY 2014

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Pilkington North America,Inc. Site Background ' Page 12 of 13 product were removed; product recovery operations have produced a cumulative total of approximately 221.71 gallons of recovered diesel. ' Condor sampled the three Site monitoring wells and two facility sumps during the first quarter groundwater monitoring event conducted on February 7, 2012. The average groundwater elevation ' measured in the three Site monitoring wells on February 7, 2012, was 3.05 feet, a decrease of 0.48 feet since the previous monitoring event on August 3, 2011, and the calculated groundwater gradient was approximately 0.003 ft/ft to the northeast. Laboratory analytical results indicated that none of the constituents of concern were detected in the monitoring wells or the SE-sump. A low concentration of TPH-MO was detected in the SW-sump. Nineteen diesel recovery and skimmer O/M events were conducted between September 1, 2011, and March 31, 2012. Free product was observed in recovery wells RW-2, RW-3, and RW-4, and approximately 7.25 gallons of product were recovered. Product recovery from the Site's recovery wells ' has produced a cumulative total of approximately 228.96 gallons of recovered diesel. Condor sampled the three Site monitoring wells and two facility sumps during the third quarter ' groundwater monitoring event conducted on August 15 and 28,2012. The average groundwater elevation in the three Site monitoring wells on August 28, 2012, was 3.03 feet, a decrease of 0.02 feet since the previous monitoring event on February 7, 2012. The calculated groundwater gradient was approximately 0.004 ft/ft to the northeast. Laboratory analytical results indicated that none of the constituents of concern ' were detected in MW-1, MW-2, or the SE-sump. TPH-D was detected in MW-3 and the SW-sump. Seventeen diesel recovery and skimmer O/M events were conducted between April 1 and September 30, ' 2012. Free product was observed in recovery wells RW-2, RW-3, RW-4, and RW-6, and approximately 4.45 gallons of product were recovered. Product recovery from the Site's recovery wells has produced a cumulative total of approximately 233.41 gallons of recovered diesel. ' Condor sampled the three Site monitoring wells and two facility sumps during the first quarter groundwater monitoring event conducted on February 5, 2013. The average groundwater elevation in the ' three Site monitoring wells was 3.76 feet, an increase of 0.73 feet since previously measured on August 28, 2012. The calculated groundwater gradient was approximately 0.004 ft/ft to the east. Laboratory analytical results indicated that TPH-K and TPH-MO were not detected at or above the laboratory ' reported detection limits in the three monitoring wells or two facility sumps. TPH-D was detected in the three monitoring wells and two facility sumps. Fourteen diesel recovery and skimmer O/M events were conducted between October 1, 2012 and March 31, 2013. Free product was observed in recovery wells RW-2, RW-3, RW-4, and RW-6, and approximately 5.28 gallons of product were recovered. Product recovery from the Site's recovery wells has produced a cumulative total of approximately 238.69 gallons of recovered diesel. ' Condor sampled the three Site monitoring wells and two facility sumps during the third quarter groundwater monitoring event conducted on August 12 and 13, 2013. The average groundwater elevation ' was 3.29 feet, a decrease of 0.47 feet since last measured on February 5, 2013. The calculated groundwater gradient was approximately 0.004 ft/ft to the northeast. Laboratory analytical results indicated that TPH-D was detected in the three Site monitoring wells and two facility sumps. 1 1