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10 May 2017 AdvantedGeo <br />AGE Project No. 14-3154 Environmental <br />Page 2 of 2 '0 V <br />Two waste cells of approximately 2,000 square feet of area each (30 to 35 feet north - <br />south to soil and 65-70 feet east -west) had demonstrated some waste glass and debris; <br />the southern cell was approximately eight feet deep and the northern cell was <br />approximately thirteen feet thick. The majority of waste stream was comprised of steel <br />parts or window components (rusted), glass, and minor plastics. Excavations removed <br />the waste from the waste cells and adequately defined the horizontal and vertical extent <br />of the buried waste, on the property to the western boundary. Excavation was required to <br />a depth of 13 feet at some locations (north cell), through the use of an excavator <br />(removing the encountered waste) to reach native soil. Removal of the waste from the <br />site to a Class II landfill was conducted in December 2015. Approximately 3,567 tons of <br />waste glass, minor garbage and cover soils were disposed. The waste glass/metal was <br />loaded into end dump trucks for transport to Forward Landfill under special waste <br />manifest. A plastic sheet barrier was installed at the western edge of the property <br />boundary, prior to backfilling native clean soil from the property area undisturbed by waste <br />handling. Additional waste was observed on the property at 17200 Murphy Parkway. <br />ADDENDUM TO SCOPE <br />AGE proposes an additional investigation be performed at the southwestern easement <br />roadway on the property at 17200 Murphy Parkway to evaluate the potential impact to the <br />subsurface. AGE anticipates that approximately eight (8) trenching locations will be <br />required to adequately evaluate the potential horizontal extent of the waste (see trench <br />location map). AGE anticipates that equally spaced trenches, excavated north to south, <br />across the easement area from east to west to a shallow depth below the surrounding <br />surface grade will adequately detect any significant mass of waste materials. Native <br />materials will be used to backfill and secure the excavations. All field procedures will be <br />overseen by an AGE representative under the supervision of a California Professional <br />Geologist. Work will be conducted under SJC-EHD oversight. <br />If you have any questions regarding this matter, please contact our office at (800) 511- <br />9300. <br />Sincerely, <br />Advanced GeoEnviron o c. <br />No. 7473 <br />William R. Liff!Lr- �tarlwffllo/' Senior Project Geologi <br />California Professional Geologist No. 7473 <br />cc: Dana Parry <br />