ARCHIVED REPORTS_2015 SITE INVESTIGATION WORK PLAN

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Y 21 July 2015 AGE Project No. 14-3154 Page 2 of 15 The known waste production glass area on the property extends approximately 400 feet north to south and 500 feet east to west. Following the termination of glass waste handling in the southern staging area, the glass waste area was covered with a minimum of two feet of soil imported from an area east of the waste area; the soil was then subsequently compacted and hydro-seeded. The LEA inspected the installation of the cover soil. PREVIOUS INVESTIGATION On 05 and 08 December 2014, soil borings (AB8 through AB21) were advanced in areas of the property where former glass debris and dust waste streams were historically managed/treated, stored, and disposed on the surface. Soil samples were collected at a minimum of five foot intervals from the soil borings and grab groundwater samples were collected from borings AB8, AB10, AB 12, and AB16. Generally, tan, brown to dark brown, silts and sands were encountered between surface grade and approximately 15 feet below surface grade (bsg). Fine to medium, well graded sands were encountered at depths between 15 feet and 20 feet bsg and silt and clay was observed in the deepest soil samples collected at 25 feet bsg. Saturated soil was encountered at depths of 15 feet bsg; and available groundwater was present at 20 feet bsg. One soil boring detected minor glass deposited at five feet below grade. No hydrocarbon-like odors were observed in samples collected from the borings. Organic vapor was not detected beyond background values from the soil samples collected from borings AB8 through AB21 using an organic vapor meter (OVM) equipped with a photo-ionization detector (PID). During boring advancement, field PID readings did not detect organic vapors above 0 parts per million volume (ppmv), with the exception of the five-foot sample at boring location A131 8-5 (0.5 ppmv). Constituents of concern (petroleum) were not detected at or above laboratory reporting limits in any of the analyzed soil samples collected from the borings; volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), polychlorinated bi- phenols (PCBs), and poly nuclear aromatic hydrocarbons (PAHs) were not detected above laboratory reporting limits. Fourteen soil samples were analyzed for CAM 17 metals; Arsenic was detected as high as 2.4 milligrams per kilogram (mg/kg), chromium as high as 7.5 mg/kg, cobalt as high as 11 mg/kg, copper as high as 21 mg/kg, lead as high 6.4 mg/kg, nickel as high as 12 mg/kg, vanadium as high as 36 mg/kg and zinc as high as 78 mg/kg from all fourteen soil samples. Additional analytes of concern were not detected above laboratory reporting limits. Four groundwater samples were collected from borings AB8 through AB16 and analyzed for CAM 17 metals. Analytical results of CAM 17 metals detected concentrations of barium as high as 0.27 milligrams per liter (mg/L), chromium as high Advanced GeoEnvironmental,Inc.