FOBAS Alert: Off Specification Fuels from Las Palmas and Houston by FOBAS Las Palmas and ISO8217 specification limit of 0.10% m/m. The Las Palmas samples were all VSLFO fuels and TSP results ranged from 0.16% m/m to 0.39% m/m. Extended analysis indicated these results were due to both precipitated asphaltenic material and extraneous dirt. The Houston samples were all VSLFO fuels and TSP results ranged from 0.17% m/m to 0.24% m/m. Extended analysis indicated these results were due to both precipitated asphaltenic material and extraneous dirt. Fuels with high sediments can result in excessive sludge deposition in tanks and throughout the