Both Ethanol and Biodiesel producers have been attracting the attention of the U.S. Environmental Protection Agency (EPA), as well as other government regulatory agencies, and coming under closer scrutiny to ensure their wastewater discharges comply with the Clean Water Act (CWA). Easy-to-use, portable infrared analyzers for on-site oil in water measurements, from Wilks Enterprise, help ensure Ethanol and Biodiesel plants do not discharge wastewater exceeding established permit levels for oil/grease levels and pollute nearby streams and waterways.
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(The success of the biodiesel fuel industry relies heavily on biodiesel testing <http://www.youtube.com/watch?v=s32Ke2VzrqU>, not only at the production level but at the consumer level, where degraded fuel may cause engine failures.  Of major concern to diesel and biodiesel users is the very real possibility that water has contaminated their fuel. (See http://www.youtube.com/watch?v=0YcczdvPyAk).  The potential catastrophic impact of this problem is discussed at length  in this video at: http://www.youtube.com/watch?v=-lh4qhXc_5s&feature=youtube_gdata.
Fleet Fuel's  family of inexpensive biodiesel test kits  is just a click away on the internet at:
<http://fleetbiodiesel.com/biodiesel_testing_and_supplies.html>)