An appeal of the air quality permit issued last year for Perpetua Resources’ proposed Stibnite mine near Yellow Pine has been dismissed by an independent hearing officer.The appeal was filed by the Nez Perce Tribe, the Idaho Conservation League, and Save the South Fork Salmon amid worries that the permit under-estimated air pollution from the mine and did not include sufficient monitoring requirements.Dylan Lawrence of Varin Thomas, a Boise law firm, dismissed each of the 13 errors cited in the appeal and upheld the permit as written by the Idaho Department of Environmental Quality.Lawrence cited expert testimony, including from DEQ employees, and agency’s discretion in administering the air permit in his order to dismiss the appeal.Mckinsey Lyon, a spokesperson for Perpetua, said Lawrence’s ruling “confirms the accuracy and thoroughness of IDEQ’s process” and validates the company’s efforts to be “protective of people and the environment.”“We remain confident that the integrity and soundness of IDEQ’s permit speaks for itself,” Lyon said.Julie Thrower, an attorney representing Save the South Fork, said the groups will appeal Lawrence’s ruling to the DEQ board of directors.