2008-02-26_GENERAL DOCUMENTS - M1986104

• Permit No: M1986104
• IBM Index Class Name: GENERAL DOCUMENTS
• Doc Date: 2/26/2008
• Doc Name: Site Characterization Report and Corrective Action Plan
• From: CDPHE
• To: B&B Excavating
• Permit Index Doc Type: Gen. Correspondence
• Media Type: D
• Archive: No

STATE OF COLORADO
~ 1 ~ ~.
BiII Ritter, Jr., Governor
James B. Martin, Executive Director
Dedicated to protecting and improving the health and environment of the people of Colorado
4300 Cherry Creek Dr. S. Laboratory Services Division
Denver, Colorado 80246-1530 8100 Lowry Blvd.
Phone [phone] Denver, Colorado 80230-6928
TDD Line [phone]
Located in Glendale, Colorado [phone] ~~~®
hitp://www.cdphe.state.co. us
EEB 2 6 200
February 19, 2008
Division ota a Safety n
Mining
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Colorado Department
of Public Health
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Mr. Chip Bair
B&B Excavati
'3415 Highway 6
Ed~~~ards, Colorado. 81632 _ - ~ -
RE: Site Characterization Report and Corrective Action lan Event for ID#20070889
B&B Excavating
3341 ~ Highway 6, Edwards, Colorado 81632
SW/EAG/BBE 1.7
Dear Mr. Bair:
Thank you for providing the Solid Waste Unit of the Colorado Department of Public Health and
Environment, Hazardous Materials and Waste Management Division ('the Division") with the Site
Characterization Report gild Corrective Action Plan Event ("the document"} for B&B Excavating,
33415 Highway 6, Edwards, Colorado ("the site," "the facility"). The document provides a summary of
a site investigation conducted at the facility after petroleum hydrocarbons, namely diesel, were found in
the subsurface at the site. The hydrocarbons are believed to be present due to the historic use of diesel
fuel as a solvent and degreaser in the facility's maintenance yard operations.
The document states that 13 test pits were excavated at the facility in order to delineate the horizontal
and vertical extent of contamination in the subsurface. ]n addition, four existing wells, MW-1, MW-5,
MW-6, and MW-11, were sampled for petroleum hydrocarbons and diesel range organics. Well 1VIW-1
was found to have the highest levels of petroleum hydrocarbons present. The report inferred ground
water flow to be to the north toward well MW-~.
The document proposes to excavate contaminated soils at the site in accordance with the Department of
Labor and Employment, Division of Oil and Public Safety's guidance Tier 1 risk-based screening levels
for petroleum-contaminated soils. The Division has the following comments regarding the document.
The facility must use the Colorado Soil Evaluation Values table as guidance for cleanup values
for soil at the site. A copy of the table is attached to this letter for your information. The table can
be downloaded at http:iiwww.cdphe.state.co.us'hf~iicse~~.~dC.
2. The document needs to indicate where samples from each test pit ~~~ere obtained (i.e., bottom or
sides of test pity and whether the samples were gn-ab samples or composites.