On 20 Sep 06, an Associated Petroleum Products (APP) fuel truck slid off the road and over an embankment at Howard Hanson Dam. Incident resulted in the release of approximately 600 gallons of #2 diesel fuel into the soil. The tanker truck has been removed from site.
Initial soil analysis predicted that the fuel would quickly move vertically through the soil until it reached the water table.
This fuel has traveled from the spill site to the reservoir shore. Temporary measures have been put in place to minimize the fuel impact to the water. This has been accomplished with a series of trenches dug with absorbent materials placed in them and also a combination of oil only absorbents and rigid containment boom.
• Work concluded on contouring of the lower slope and excavation equipment was demobilized from site.
• Two additional extraction wells were installed as a preventative measure to reduce the possibility of water from the upper slope bypassing the existing well.
• Norm Peck from Department of Ecology’s Toxics Cleanup Program was identified as their POC for upper slope treatment phase of operations.
• Final count: Approximately 1006 tons (670 cubic yards) of petroleum contaminated soil was removed from the site.
• Kira Lynch and Kym Takasaki collaborated with Harold Cashman on treatment methods for the upper slope. The evaluation includes calculating anticipated concentration/volume of impact area, evaluating treatment options and developing exploration techniques on steep slopes.
• Lower slope will be covered with jute mat and hydroseeded this Friday (October 13th).
• Whatcom will submit a written proposal for upper slope treatment to the Corps tomorrow. Process will be coordinated with both Department of Ecology and EPA.
• Treatment methods for the upper slope.
• Completing work prior to poor weather beginning.
• Meeting planned to discuss final phase of work (upper slope).
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