On March 13 and June 8, 2007, the D.C. Court of Appeals vacated Maximum Achievable Control Technology (MACT) rules for hazardous air pollutants (HAPs) for Brick and Structural Clay Manufacturing Facilities and for Industrial, Commercial and Institutional Boilers and Process Heaters. The compliance dates for these rules were May 16, 2006 and September 13, 2007, respectively. These rules are now null and void until EPA completes rulemaking to remedy the deficiencies identified by the court. Under Section 112(j) of the Clean Air Act (CAA), major sources of HAPs previously subject to these MACT rules must apply for a case-by-case MACT determination to be included in the facilities’ Title V operating permits. Some States are requesting sources to submit their case-by-case MACT permit applications, while others are waiting for more detailed guidance from EPA. For further information, please contact Kent Berry at (800) 229-5299 or Jeff Slayback or Dawn Miller at (800) 229-7495.
EQ’s Lynwood Washington office is managing an ongoing remediation project at the Conjecture Mine site in Idaho. The removal action at Conjecture Mine is part of a comprehensive approach by U.S. EPA and the United States Forest Service (USFS) to address mine waste contaminants in the Gold Creek watershed. The purpose of the removal action is to mitigate the release of hazardous substances, including arsenic, lead, and manganese, from waste rock dumps and sediment along Gold Creek. Contaminated mine waste materials (approximately 40,000 loose cubic yards) are being removed from the site for deposition in a nearby waste repository. Mine-waste materials to be removed are identified by field screening, including visual observation and analysis by field portable x-ray fluorescence (FPXRF). Following removal of the contaminated materials, the excavated areas are being backfilled as necessary using fill from borrow sites on USFS land in the vicinity of the site. In addition, a clean stream corridor has been constructed for Gold Creek and its tributaries to restore hydraulic capacity and to prevent erosion and liberation of metals contamination. Construction of this corridor included removal of approximately 7,500 cubic yards of contaminated sediment and reshaping the topography to allow the water to flow through a clean and stable corridor. Regrading efforts are substantial, and include moving roughly 100,000 cubic yards of material to prevent waste rock from coming into contact with surface water. The location is remote, and the entire crew is staying on site in a 25 -room mobile camp complete with two cooks for meal preparation. The site is completely self-contained with lodging, food, satellite internet, satellite phones and cell phone boosters. Please visit EQ’s website for photos and more information on this project, other EQ remediation projects, EQ’s site remediation capabilities; or call Jason Coury at (425) 673-2900 or Bob McCullough at (800) 229-7495.
For your engineering needs, please contact EQ Engineers at 219-844-3500 or visit their website.
For international engineering services, please contact EQ Engineers Slovakia via their website.
For questions about EQ's capabilities, please email or call Bob McCullough.
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