Problem: Nearly 370m 2 (4,000 ft 2 ) of congealed # 6 oil, 750 microns (30 mils) thick, needed to be cleaned from aluminum insulation sheathing on petroleum storage tanks in South Portland, Maine. Clean Harbors, Inc., a national hazardous waste remediation contractor, was hired to clean and remove the thick oil layer. Due to issues of contaminant properties, substrate integrity, containment and environmental restraints, many indus- trial cleaning methods were ruled out. Solution: Using Sponge-Jet’s Sponge Blasting System, TM Clean Harbors was able to efficiently remove the thick oil coating and the residual black stains without causing damage to the aluminum substrate or to the surrounding environment. Goals:
Cost efficient
No damage, no stain on substrate
Limited containment, n

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