JBI has already stated that their output contains 8 ppm sulfur. According to wikipedia, "ultra low sulfur diesel" is defined as having 10ppm or less.
Here is their text:
"Samples of fuels were created from various plastic feedstocks and were tested (ASTM D 5453) and confirmed a sulphur concentration less than 8.4 ppm (parts per million). Additionally, the water and sediment tests (ASTM D 1796) confirm that its fuel contained less than 0.005% water and sediment."