A wavebreak was constructed more recently (approximately 20 years ago) and provides some measure of protection from weather- related damage. The surfactants that were tested to clean oil from a small area performed satisfactorily. A poultice was also effective at removing surface soiling, though would be more effective at removing stains that penetrate the surface if left for a longer period. Further laboratory testing is planned and will be shared with the Louisiana Office of State Parks as the results are complied.
At the request of the Louisiana SHPO and Louisiana Office of State Parks, two NCPTT staff members visited Fort Livingston, Grand Terre Island, in Jefferson Parish, Louisiana to assess the amount of oil contamination on the fort and to test cleaning methods on small portions of the structure.
On June 16, 2010 Jason Church and Carol Chin met Sara Clowery of HDR/E2M and Nicholas Neylon, Dianne Mouton-Allen and Tamara Augustine of the Louisiana Office of State Parks. Sara Clowery is a contracted archaeologist for BP who was on assignment at the BP incident command in Houma, Louisiana. Tamara Augustine is the Park Manager for Grand Isle State Park. The group and equipment were transported by a workboat and airboat to Grand Terre Island, which is accessible only by boat from Grand Isle, Louisiana.
On the day of the visit, the weather was warm, approximately 90°F. Temperatures on the sand were significantly warmer, which affected the viscosity of the oil observed on the beach. According to online NOAA tides data, high tide occurred at approximately 11:30 am on June 16. This is consistent with field observations. The group arrived at Grand Terre Island at approximately 11:30 am and returned to Grand Isle at approximately 4:00 pm and noticed that the tide had receded during that time.