GENERAL40263

• Permit No: M1980131
• IBM Index Class Name: General Documents
• Doc Date: 10/21/2005
• Doc Name: Contaminated Soil Final Cleanup
• From: Elam Construction
• To: DMG
• Media Type: D
• Archive: No

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1225 South 7th Street -°'~
Grand Junction, Colorado 81501-7791
[phone] FAX [phone]
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October 20, 2005
Mr. Greg Stasinos /
Colorado Department of Public Health & Environment /
Emergency Management Program
4300 Cherry Creek Drive South, Building A3
Denver, CO 80246 /
RE: Contaminated Soil Final Cleanup, Report No. 2005-181
Dear Mr. Stasinos,
OCT 2 12085 >/
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This Letter provides documentation of cleanup of a diesel spill that occurred on March 28, 2005
(reference CDPHE Report No. 2005-181). As discussed in previous letters dated April 1 and
May 17, Elam treated the contaminated material on-site. Following is a description of the final
clean-up process which occurred from September 12 through October 3, 2005.
The contaminated material, which consisted primarily of pit run, was removed from the affected
area and stored in a lined bermed area immediately after the spill, as described in previous letters
dated April 1 and May 17. Storage of the material was necessary until the required rock crushing
equipment became available to mobilize to the site in Craig. The contaminated pit run material
was blended with clean pit run and processed through the crusher. This process was used to
minimize the possible introduction of high concentration ofdiesel-contaminated material into the
crushing equipment. Two samples were obtained during this procedure to have tested for Total
Petroleum Hydrocarbons-Diesel. One sample (BR-4; 845 ppm) was obtained from the
contaminated stockpile prior to blending and crushing. The second sample (BR-5; 22 ppm) was
obtained at the discharge point of the crusher.
Additionally, the area under the lined containment area was over excavated to a depth of
approximately 18-inches to 24-inches. This over excavated area covered an area of
approximately 45-feet by 70-feet. The over excavated material became contaminated during the
removal of contaminated material when the liner became damaged during the final clean up.
Visual inspections of the area were conducted to assure all stained soil was removed. In addition
to the visual inspection, soil within this area was smelled for any detection of residual diesel.
Otrce the area was determined to be clean, two samples were obtained from the excavated area
and tested for Total Petroleum Hydrocarbons-Diesel. Both test results (BR-6; 102 ppm and BR-
7; 38 ppm) are well below the threshold of 500 parts per million, which is considered the limit
for contaminated material. The processed material was ultimately used in the production of hot
mix asphalt material. -,