3.0 FIELD RESULTS

Subsurface soils generally consisted of fill material to a depth of 0.5 feet bgs, sandy clay and clayey sand from 0.5 feet to 8 feet, fine sand grading to coarse sand and medium gravel from 8 feet to approximately 18 feet bgs where weathered bedrock was encountered. Drill refusal occurred at 19 to 19.5 feet bgs. Borelogs for the exploratory holes are stored in our project file. We encountered free groundwater in each boring during installation. After allowing time to equilibrate, static groundwater levels were measured at approximately 3 feet bgs.

Field evidence of soil and groundwater contamination was identified in boring 3-7 only. Black- stained soil with a solvent and/or petroleum odor was observed from approximately 1 foot bgs to approximately 9¼ feet bgs. PID readings of up to 70 parts per million (ppm) were observed during scans of the soil cores from boring B-7. Field evidence of contamination disappeared below approximately 9½ feet bgs. We observed no field evidence (odors, soil stains, or PlO hits) of contamination during installation and sampling of the other two borings or six monitoring wells.



3554-001(2) Site Characterization Investigation Page 3 of B
Community Airpark Association, Inc.
Fort Collins, Colorado
Stewart Environmental Consultants, Inc.