Engineering Controls to Protect Collections Inside a Museum During Excavation and In-situ Ozone Treatment of MGP Residuals

摘要

Seldom are engineering controls to mitigate impacts from MGP remediations morernstringent to protect objects rather than human health. This paper describes thernengineering controls designed to protect collections and artifacts inside a HistoricrnMuseum in Santa Barbara, California during the excavation and in-situ ozone treatmentrnof manufactured gas plant (MGP) residuals. The approved remedial action plan calls forrnexcavation of approximately 8,000 cubic yards of soil and in-situ ozone sparging to treatrnapproximately 32,000 cubic yards of soil.rnThe Museum buildings are constructed of adobe bricks (one structure dating backrnto 1817) and contain collections such as; textiles, paintings, fine art, leather goods andrnbooks. A cultural heritage preservation consultant assessed the potential impacts fromrndust, vibration, ozone and volatile organic compounds generated by the plannedrnremediation. The two major risk factors that could affect Museum collections are: dustrnand combustion engine exhaust generated during excavation, and ozone and other volatilerncompounds generated during the in-situ ozone remediation.rnThe engineering controls to mitigate impacts from physical and chemical agentsrngenerated during remediation activities include: 1) sealing of doors, windows and roofrnjoints, 2) installing an air intake handling system capable of maintaining a positive airrnpressure inside the building, 3) installing a “high efficiency” air filtration system inrnconjunction with the air handlers, 4) excavating source areas of contamination inside arnsprung structure equipped with negative air pressure, 5) soil vapor extraction systemrnworking in conjunction with in-situ ozone sparging, and 6) installing a state–of–the–art,rnintegrated monitoring system to detect ozone intrusion, change in air pressure, excessive