Use these resources for further guidance:
Method 1623: Cryptosporidium and Giardia in Water by Filtration/IMS/FA. 815-R-05-002. 2005. U.S. Environmental Protection Agency, Office of Water, Office of Ground Water and Drinking Water Technical Support Center, Cincinnati, OH.
Method 1622: Cryptosporidium in Water by Filtration/IMS/FA. 815-R-05-001. 2005. U.S. Environmental Protection Agency, Office of Water, Office of Ground Water and Drinking Water Technical Support Center, Cincinnati, OH.
Microbial Laboratory Guidance Manual for the Long Term 2 Enhanced Surface Water Treatment Rule (LT2 Rule). 815-R-06-006. 2006. U.S. Environmental Protection Agency, Office of Water, Office of Ground Water and Drinking Water Technical Support Center, Cincinnati, OH.
The following EPA websites contain general information regarding LT2:
http://www.epa.gov/safewater/disinfection/lt2/index.html
http://www.epa.gov/safewater/disinfection/lt2/lab_home.html
The following sites may be helpful. The list is not complete and inclusion on the list is not an endorsement or recommendation by the EPA.
Invitrogen Dynal® Bead Based Separation
Aureon Biosystems Pathogen Detection