if anyone out there does commercial tests for radionuclides in groundwater and soil extract samples, i would appreciate an email reply - i'll then provide details. paul skierkowski univ. of oklahoma pskierkowski@ou.edu Paul Skierkowski Environmental Safety Services University of Oklahoma 905 Asp Ave, Room 112 Norman, OK 73019-6041 (405)325-1015 FAX: -7238 PSKIERKOWSKI@OU.EDU