0000948600-02-000035 424B3 1 20020509 PERMA FIX ENVIRONMENTAL SERVICES INC 0000891532 4955 581954497 DE 1231 424B3 33 333-43149 02639808 1940 NORTHWEST 67TH PLACE SUITE A GAINESVILLE FL 32653 3523734200 1940 NW 67TH PL SUITE A GAINESVILLE FL 32653 424B3 1 supp5.htm FIFTH SUPPLEMENT TO 2000 PROSPECTUS