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21 December 2017 AGE-Project No. 14-3154 Page 7 of 23 detected at an elevated level of 16%. Detectable methane concentrations are significantly below the LEA action level of 1%. Therefore, no on-going control for methane gas should be necessary.  Subsurface Trenching/Exploration – July 2015: On 30 and 31 July 2015, Trenches T24 through T57 were excavated/established and duplicate trenches for T7, T10, and T11 were established in the waste/glass handling area (T7B, T10B, T11B). Trenches T24 through T57 were established surrounding the known waste/glass handling area, except to the immediate west of the area (Figure 3). Trenches T46, T48 and T50 were established near the western property boundary of the site discovering a large area and deep cross-section of loosely consolidated glass, metal and minor factory debris, covered by native soil. AGE initially designated this area the South Waste Cell. No significant glass or waste was encountered in the other trenches, except for minor metals buried at trench T29 (Figure 3; Appendix A and B).  Subsurface Trenching/Exploration – August 2015: On 03 August 2015, Trenches T58 to T60 were established along the western property boundary, defining the limits of the South Waste Cell initially discovered by T46, T48, and T50. The vertical limits of the waste were observed at trench T59 to be approximately 11 feet bsg (Figure 3; Appendix A and B).  Ground Penetrating Radar Survey (GPR) – June and August 2015: On 30 June 2015, at the direction of the LEA, a limited ground penetrating radar survey was performed and initially indicated limited amounts of buried glass across the area of T1 to T23 (waste/glass handling area). However, the soil composition was not ideal for GPR and there was no evidence to indicate the boundaries of the waste/glass handling area. On 27 August 2015, A secondary GPR and magnetometer survey conducted within the western portion of the property and on the Cogen property, indicated the presence of buried glass and ancillary metals across two cells; generally limited to relatively small areas along the far western property margin. The August 2015 GPR survey, confirmed the waste cell locations on the Cogen property, but due to the soil composition could not define the boundaries of the waste cells on the subject property. Additional trenching along the western property boundary ultimately defined the waste cells (Appendix E).  Subsurface Trenching/Exploration – September 2015: On 08, 09 and 10 September 2015, trenches T63 to T91 were established in the western portion of the site at the direction of the LEA. This investigation encountered and discovered an additional large area and deep cross-section of loosely consolidated debris at the western edge of the property. This area was designated the North Waste Cell, and was well defined by trenches to the north, south, and east; the western limits of the waste cell were not determined. The vertical limits of the North Waste Cell were observed at trench T65 to be approximately 13 feet bsg. Both the North and South Waste Cells were documented to extend into the adjacent Cogen property, to the west. (Figures 3 and 4).