Southern California Edison Santa Barbara I MGP in-situ ozone treatment groundwater progress monitoring

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- By:

Courtesy of Piper Environmental Group, Inc

Southern California Edison
Santa Barbara - Former MGP site
In-situ Ozone Treatment
Piper Case History #1
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Problem:

Former MGP site containing VOC and PAH contamination needed aggressive soil and groundwater remediation.

Project Solution:

• Phase I - Limited Soil Excavation near Former Gasholder
• Phase II – In-Situ Ozone Sparging for Deep Soils
• Phase III – Surface Soil Excavation

Contaminants and Cleanup Goals:

Groundwater Remedial Goals
• Based on MCLs and Taste & Odor Thresholds
-VOCs: Benzene 1 ug/L
-Ethylbenzene 300 ug/L (700 ug/L)
-Toluene 150 ug/L
-Xylenes (total) 1,750 ug/L
-Styrene 100 ug/L
-PAHs: Benzo(a)pyrene 0.2 ug/L
-Naphthalene 21 ug/L (taste & odor)
-TPH: 1 mg/L (taste & odor)

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