Background of the Subslab Depressurization System (SSDS)
- Site History
- 1961: metal craft products manufacturing
- 1971:warehouse was expanded
- 1980’s/1990’s refinishing/enameling company operated perchloroethylene (PCE) degreaser, baking oven, paint and solvent spray booth, and unspecified “other” solvent degreaser
- 23,000 square foot building footprint
- Heterogeneous slab slab poured at different times over the life of the building
- PCE is the Chemical of Concern (COC)
- Soil vapor and indoor air sampling results above the allowable limits
Pre-Work for the Subslab Depressurization System (SSDS)
- Cracks were sealed by others
- Pilot test was conducted
Construction of the Subslab Depressurization System (SSDS)
- 3 extraction points
- 9 observation points
- Blower w/carbon
Start Up, Acceptance and Operation of the Subslab Depressurization System (SSDS)
- Started up and adjusted system to achieve full slab coverage
- Compiled start-up report and included Operations and Maintenance (O&M) Manua
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