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18 October 2019 AGE Project No. 19-4885 Page 2 of 3 SOIL EXCAVATION AND SAMPLE COLLECTION A total of four excavations were performed at the property on 09 October 2019. The main excavation (EX-1) was completed to a depth of seven feet below surface grade (bsg). A second smaller excavation (EX-2) was completed to the west of EX-1, to a depth of two feet bsg (Figure 2); two pothole excavations were performed northeast of EX-1 and EX-2 to a depth of one-foot bsg. Soil was excavated in EX-1 and EX-2 until the sidewalls and base of the excavations appeared free of staining and hydrocarbon impact. Soil in the two pot hole locations did not indicate significant evidence of impact and the holes were terminated at one-foot bsg. One soil sample was collected at the base of the main excavation (EX-1) at a depth of seven feet bsg. The soil sample was hand packed into a two- by six-inch stainless-steel sleeve. Once the sample was packed, each end was covered with Teflon, capped, sealed with tape and stored in a chilled container. The samples were later delivered to Enviro- Chem Inc. (ECI) and analyzed for the following: • Total petroleum hydrocarbons quantified as gasoline, diesel and motor oil (TPH-g/d/mo) in accordance with EPA Method 8015M. • Volatile organic compounds (VOCs) in accordance with EPA Method 8260B. Upon completion of excavation and sampling, backfill material was imported to fill the cavities of the excavations. Imported fill was compacted and spread evenly to match the surface level of the surrounding area. Copies of disposal tickets documenting the removal and disposal of 7.4 tons of excavated soil are included in Attachment A. FINDINGS One soil sample (EX-1/7’) was collected from excavation EX-1 at a depth of seven feet bsg and was analyzed for the constituents listed above. TPH -d was detected at a concentration of 65.7 milligrams per kilogram (mg/kg). No additional petroleum hydrocarbons or VOCs were reported in the excavation soil sample. The laboratory report and chain of custody are included as Attachment B. CONCLUSIONS AND RECOMMENDATIONS Based on laboratory analysis and field evaluation, soil impact encountered during the October 2019 excavation has been removed to the extent practicable. It’s AGE’s opinion that additional excavation and sampling do not appear warranted at this time.