the study results are accurate and reproducible. 



Upon receipt of the samples, station and sample information 

 were recorded in a laboratory notebook and the samples were 

 assigned a unique number compatible with the Montana Diatom 

 Database, e.g., 2004-01. The first part of this number (2004) 

 designates the sampling site (Judith River west of Ross Fork) ; 

 the second part of this number (01) designates the number of 

 periphyton samples that have been collected at this site to date 

 for which data have been entered into the- Montana Diatom 

 Database . 



Sample observations and analyses of soft (non-diatom) algae 

 were recorded in a lab notebook along with station and sample 

 information provided by MDEQ . A portion of the raw sample was 

 used to make duplicate diatom slides. After completing the 

 diatom proportional count, the slide used for the count will be 

 deposited in the University of Montana Herbarium in Missoula. 

 The other slide will be retained by Hannaea in Helena. 



On completion of the project, station information, sample 

 information, and diatom proportional count data will be entered 

 into the Montana Diatom Database. 



RESULTS AND DISCUSSION 



Results are presented in Tables 5 and 6, which are located 

 near the end of this report following the Literature Cited 

 section. Spreadsheets containing completed diatom proportional 

 counts, with species' pollution tolerance classes (PTC) and 

 percent abundances, are attached as Appendix A. 



SAMPLE NOTES 



J 1. Some filaments of Audouinella had terminal setae. 

 Specimens of Synedra were particularly evident among the diatoms 



J 3. No observations were recorded for this sample. 



NON- DIATOM ALGAE 



