Brian Peck, Republican candidate for the 17th Legislative District seat, failed to disclose on a Washington Public Disclosure Commission financial report that he is a business owner.The PDC, responding to a complaint from the House Democratic Campaign Committee, has asked Peck to amend the financial report he filed at the beginning of his campaign to disclose that he owns two businesses, including a gas station on St. Johns Road in Vancouver. “PDC staff did contact Brian Peck about his personal finance report,” commission spokeswoman Lori Anderson said Tuesday. “We learned that he owns a couple of businesses that he did not identify when he filed at the beginning of his campaign. According to Mr. Peck, he mailed off an amended filing yesterday.”Anderson said no decision has been made on whether the PDC, which enforces state campaign finance disclosure rules, will initiate an enforcement action over Peck’s incomplete filing.“I made a mistake in the filing process,” Peck acknowledged Wednesday. He said he did disclose the names of the businesses he owns, Peck Petroleum and Peck Property, on the first page of the form, but failed to fill out the part of the form requesting supplemental details, including what percentage of each business he owns.