WASHINGTON ( CNN ) -- Up to 80,000 items at the Ronald Reagan Presidential Library are unaccounted for , probably because of haphazard record-keeping and inventory procedures , officials said Thursday . An audit found `` significant breakdown in internal controls '' at the Ronald Reagan Presidential Library . An audit completed last month by the National Archives and Records Administration 's inspector general looked at the management of presidential artifacts at six presidential libraries . It `` cites particular issues at the Ronald Reagan Library . ... We acknowledge that problems exist in inventory control at the Reagan library , '' said a statement from Allen Weinstein , national archivist . Inspector General Paul Brachfield was more blunt . A `` significant breakdown in internal controls '' was found at the Reagan library , in Simi Valley , California , he said in a statement Thursday . The audit results prompted the Ronald Reagan Presidential Foundation to urge the National Archives -- which is responsible for maintaining the artifacts -- to move quickly to fix the problems . The chairman of the board of trustees has contacted Weinstein `` to express the serious concerns and disappointment on behalf of the Reagan Foundation and Mrs. Reagan , '' the foundation said . Library officials told auditors that `` the collection contained approximately 100,000 items , yet the library systems only had information to locate and account for approximately 20,000 items , '' Brachfield said . `` This does not automatically mean the approximately 80,000 remaining items are missing . The vast majority may very well be safely located within the library 's storage facilities . ... Some of these items may be missing or stolen , or none of these items may be missing or stolen . '' Control deficiencies at the library created an environment that could potentially have been exploited , Brachfield said . Although Congress has a copy of the audit , it has not yet been made public because of the ongoing investigation into the whereabouts of the items . The count of 100,000 was an estimate taken from the original Reagan White House Gift Unit database , Weinstein said Thursday , but was never meant to be used as a concrete inventory control number . The Reagan library has already begun implementing recommendations from the audit , he said . It has upgraded its management inventory software , is hiring additional trained museum staff , has begun a comprehensive inventory and is addressing storage issues by reshelving artifacts and taking steps to protect artifacts in case of an earthquake . `` Like all of the presidential libraries , the Reagan library stores their gifts in a locked vault , which is protected by a security camera , '' Weinstein said . The audit examined management of artifacts at the Reagan library ; the Franklin D. Roosevelt library ; the John F. Kennedy library ; the Gerald R. Ford library ; the George Bush library ; and the William J. Clinton library , Weinstein said . `` Early collections of artifacts came to presidential libraries with few controls and incomplete information relating to the collections , '' he said . E-mail to a friend .
Of 100,000 items , library systems are able to locate about 20,000 . Inspector general : This does not mean the remaining items are missing . It means that they have been located and can be found by a librarian or other person who has access to them. Items may `` be safely located within the library 's storage '' Ronald Reagan Presidential Foundation expresses `` serious concerns ''