Laserfiche WebLink
Amendment #1 <br />C0-0000213 <br />Page 2 <br />;ill. PURPOSE OFAMENDMENT <br />In a letter dated August 16, 2007, Western Fuels Company requested an amendment to the permit to reduce the WET testing frequency <br />from quarterly to biannually. The facility has been required to perform accelerated testing due to failures of a WET test on two <br />occasions, once in 1995 and once in 2006. Accelerated testing did not show any pattern of toxicity and therefore the WET tests were <br />deemed to have passed. <br />IY. CHANGES AS A RESULT OF THE AMENDMENT <br />The permittee was previously required to perform acute WET testing. The renewal permit requires chronic WET testing be performed, <br />which is a new limitation and test, which the permittee has not yet shown the ability to pass. However, the Division is updating its WET <br />policy to allow flexibility in assigning either acute or chronic WET requirements. The current policy states that chronic WET testing will <br />be required where the ratio of the chronic low flow to the effluent design flow is less than 10:1. As the chronic low flow for this facility is <br />0 for all months, this resulted in a chronic WET requirement. The Division is inserting text into the WETguidance that states in the case <br />of a receiving stream where the low flow is zero for all months, and the discharge from the facility is intermittent, then the Division may <br />consider acute WET testing on a site speck basis. This decision is due to the fact that these receiving streams do not contain water on <br />any consistent basis, and the discharge itself does not flow on a consistent base, therefore, chronic effects are not likely to be seen in <br />these scenarios. <br />In the permittee's application for a renewal permit, which was received in August of2006, it is stated that all discharges are intermittent, <br />with the exception of Outfa11007, which is nearly constant. Therefore, the chronic WET requirements will be changed to acute WET <br />re_yutr~men~s at all ou alls with the exception o Outfall 007. As the facility has not had any exceedances of the acute WET limits at these <br />outfalls, the monitoring frequency w: a reduced to semi-annually. <br />For Outfa11007, the discharge Is on more of a continuous basis, and therefore the chronic exce~on will not apply. Also, as the chronic <br />limit r as new limit, it is unknown if compliance with the limit will be maintained and therefore the frequency will remain quarterly. <br />YIl. PUBLIC NOTICE COMMENTS <br />No comments were received during the public notice period <br />Andrew J. Neuhart <br />September I2, 2007 <br />Andrew J. Neuhart <br />October 25, 2007 <br />AMENDED: OCTOBER 24 2007 EFFECTIVE: DECEMBER 1 2007 EXPIRATION• MARCH 31 2012 <br />Attachment 2.05.3(3)-18-51 <br />