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11/12/2015 State.co.us Executive Branch Mail - Fwd: FW: Results of Ravine Samples <br />- Gasoline range organics (GRO) <br />PCBs, and <br />MBTEXn (Benzene, Ethylbenzene, Methyl tert-Butyl Ether, Naphthalene, Toluene, and Xylenes) <br />Soil sample locations 1, 2, 3, and 4 (S-1-12, S-1-15, S-2-6, S-2-14, S-3-8, S-4-14, and S-4-6) were taken in the <br />bottom of the drainage directly downgradient of barrel(s). Samples were taken at varying intervals to refusal. All <br />of these samples returned a non -detect. Barrel 1 (B-1) located in the bottom of the ravine returned a non -detect. <br />Soil sample location 5 (S-5-6 and S-5-12) was taken up on the hillside directly adjacent to a barrel with liquids <br />with obvious soil staining present. This sample resulted in a high DRO detect (8530 mg/kg dry at 12", and 10700 <br />mg/kg dry at 6"). The barrel located next to the soil staining (B-3) also resulted in high DRO (392,000 mg/kg wet) <br />and minor solvents (naphthalene 0.16 mg/kg wet and xylenes mg/kg wet). <br />Samples from Barrel 2 (B-2) also resulted in high DRO (367,000 mg/kg wet) and minor solvents (naphthalene <br />0.14 mg/kg wet). There was no soil staining from this barrel. <br />Soil sample 6 (S-6-6 and S-6-12) was taken at the bottom of the ravine prior to the culvert under Highway 13. <br />There were minor DRO hits (90 mg/kg dry at 6" and 107 mg/kg dry at 12"). Due to the fact that there were no <br />detections from the bottom of the ravine we attribute this minor detection to other sources, possibly the adjacent <br />road. <br />Sample locations are provided in the table below. I've also attached photos showing the sample locations by <br />waypoint. <br />Waypoint <br />No. <br />Sample Type <br />CO State Plane North NAD 83 <br />X <br />Y <br />Elev. (ft) <br />25 <br />Soil <br />2402702 <br />1404933 <br />1915.828 <br />26 <br />Soil <br />2402665 <br />1404946 <br />1913.532 <br />27 <br />Soil 3 & Barrel 1 <br />2402585 <br />1405006 <br />1911.718 <br />28 <br />Barrel <br />2402697 <br />1404979 <br />1922.865 <br />29 <br />Soil <br />2402826 <br />1404822 <br />1925.591 <br />30 <br />Soil 5 & Barrel 3 <br />2403019 <br />1404742 <br />1937.856 <br />31 <br />Soil <br />2402028 <br />1406641 <br />1870.308 <br />https://mail.googl e.com/m ai I/u/0/?ui=2&i k=e29129fcb5&view=pt&search= i nbox&th= l50t7e5eO9a5aba9&si m l=150f7e5e09a5aba9 3/5 <br />