Perma-Fix Environmental Services, Inc.https://pcaobus.org/form-ap-filings/53815/53815Perma-Fix Environmental Services, Inc.538153/31/2020 8:49:44 PM20194854f1c5-7d04-45cb-8c89-560e358a574f248Grant Thornton LLP47407Perma-Fix Environmental Services, Inc.891532PESI0024800024John William Bishop Jr.0024800024True