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MSHA Enforcement: RESPA-SD saves Underground Silica Mine Thousands in MSHA FINES
Respirable Crystalline Silca (RCS) Exposure reduced from high of 667% of Personal Exposure Limit (PEL) to as low as 37% of PEL.
A Caterpillar 330CL excavator operating as a scaler in an underground Silica Mine in Wisconsin, USA., was out of compliance each of the five times that the Mine Safety and Health Administration (MSHA) tested the average daily exposure rate of the operator to respirable crystalline silica (RCS). Prior to the installation of the REPSA–SD, the excavator not only failed every time it was tested, but it failed by a rather dramatic margin.
The last time the machine failed it received a D-Citation and the machine was removed from operation until it could be brought into compliance. Each of the citations was accompanied by a substantial fine.
The mine operator sealed the cab and was still unable to get the cab to meet the exposure limits.
The RESPA-SD was properly installed on the sealed cab on 11/5/2009. MSHA tested the operator of the cab on 11/17 and 11/18 and for the first time since the excavator began operation at the mine it passed the MSHA test. It was released to full operation in the mine. Since that time was again inspected on 2/3/2010 and was still under the Permissible Exposure Limit (PEL).
The cost of the RESPA-SD installation was less than one of the MSHA fines.
A Caterpillar 330CL excavator operating as a scaler in an underground Silica Mine in Wisconsin, USA., was out of compliance each of the five times that the 
