Conference Proceedings ~ Papers

Geza, M., J.E. McCray, K.S. Lowe, M. Tucholke, A. Wunsch, and S. Roberts (2009). A Simple Tool for Predicting Nutrient Removal in Soil Treatment Units. Proc. National Onsite Wastewater Recycling Association (NOWRA) 18th Annual Technical Education & Exposition Conference.

Roberts, S. M., J. E. McCray and K. Lowe (2009). Modeling the Fate and Transport of 5 Organic Wastewater Contaminants in Onsite Wastewater System Soil Treatment Units. Proc. NOWRA 18th Annual Technical Education & Exposition Conference.

Tucholke, M.B., N.K. Rothe, and K.S. Lowe (2009). A Comparison of Standard Constituents Present in the Modern Waste Stream to Values Reported in the Literature. Proc. NOWRA 18th Annual Technical Education & Exposition Conference.

Wunsch, A., J.E. McCray, M. Geza, and D.E. Radcliffe (2009). Modeling Soil Treatment Units with Hydrus-2D, Constructed Wetlands Module (CW2D). Proc. NOWRA 18th Annual Technical Education & Exposition Conference.

Wunsch, A., J.E. McCray, K.S. Lowe, and R. Furrer (2009). Analyzing Wastewater-N and P Concentrations in Soil Treatment Using Multivariate Statistics. Proc. NOWRA 18th Annual Technical Education & Exposition Conference.

Tucholke, M.B., J.M.B. Tomaras, and K.S. Lowe (2008). Regional Differences in Raw Wastewater and Primary Treated Effluent Characteristics from Single Residential Sources. Proc. of NOWRA 17th Annual Technical Education & Exposition Conference.

Tuchloke, M.B., D. Anderson, and K.S. Lowe (2008). Mass Loading Rates for Standard Constituents for Onsite Wastewater Treatment Systems from Single Residential Sources. Proc. WEFTEC 2008, 81st Annual Conference and Exposition, Water Environment Federation (WEF), Water Environment Research Foundation (WERF) Workshop #116.

Conn, K.E., R.L. Siegrist, L.B. Barber, and G.K. Brown (2007).  Organic Contaminants in Onsite Wastewater Treatment. Proc. Eleventh National Symposium on Individual and Small Community Sewage Systems, American Society of Agricultural and Biological Engineers (ASABE).

Geza, M. and J.E. McCray (2007).  Modeling the Effect of Population Growth on Stream Nutrient Concentration in Turkey Creek Watershed using the WARMF Model. Proc. Eleventh National Symposium on Individual and Small Community Sewage Systems, ASABE.

Geza, M. and John E. McCray, (2007). Modeling The Effect of Discharges from On-Site Systems and Sewers on Stream Nutrient Loading in Turkey Creek Watershed Using WARMF and SWAT. Proc. NOWRA 17th Annual Technical Education & Exposition Conference.

Lemonds, P.J. and J.E. McCray (2007).  Modeling Phosphorus Loading in an Urban Drinking Water Source Watershed.  Proc. WEFTEC 07, 80th Annual Conference and Exposition, WEF.

Lindstrom, K.A., J.E. McCray, and G.D. Thyne (2007).  Modeling pf Phosphorus Reactions during Wastewater Infiltration using Analytical and Numerical Modeling Techniques. Proc. Eleventh National Symposium on Individual and Small Community Sewage Systems, ASABE.

Lowe, K.S., S.M. VanCuyk, and R.L. Siegrist (2007).  Soil Treatment Unit Performance as Affected by Hydraulic Loading Rate and Applied Effluent Quality.  Proc. Eleventh National Symposium on Individual and Small Community Sewage Systems, ASABE.

McKinley, J.W. and R.L. Siegrist (2007).  The Occurrence of Humic Substances and Polysaccharides in Soil Treatment Units used for Wastewater Reclamation. Proc. Eleventh National Symposium on Individual and Small Community Sewage Systems, ASABE.

Parzen, R.E., J. Tomaras, and R.L. Siegrist (2007).  Controlled Field Performance Evaluation of a Drip Dispersal System Used for Wastewater Reclamation in Colorado.  Proc. Eleventh National Symposium on Individual and Small Community Sewage Systems, ASABE.

Siegrist, R.L. (2007).  Engineering Soil Treatment Units as a Unit Operation in Onsite Wastewater Reclamation Systems.  Proc. Eleventh National Symposium on Individual and Small Community Sewage Systems, ASABE.

Siegrist, R.L., K.S. Lowe, J.E. McCray, J. Marr, J. Drewes, J.R. Spear, J.M.B. Tomaras (2007). Advancing the Science and Engineering and Integration of Onsite Wastewater Systems. Invited paper, Proc. The Onsite ’07 International Conference, Armidale, Australia. 

Tomaras, J., J.W. Sahl, J.R. Spear, and R.L. Siegrist (2007).  Molecular Characterization of the Microbial Community in Onsite Treatment Units.  Proc. Eleventh National Symposium on Individual and Small Community Sewage Systems, ASABE.

Tucholke, M.B., J.E. McCray, G.D. Thyne, and R.M. Waskom (2007).  Correlating Denitrification Rates to Soil Texture using Hierarchical Cluster Analysis.  Proc. Eleventh National Symposium on Individual and Small Community Sewage Systems, ASABE.

Tucholke, M.B., J.E. McCray, G.D. Thyne, and R.M. Waskom (2007).  Variability in Denitrification Rates: Literature Review and Analysis.  Proc. NOWRA 16th Annual Technical Education & Exposition Conference.

Dimick, C.A., K.S. Lowe, R.L. Siegrist, and S.M. Van Cuyk (2006).  Effects of Applied Wastewater Quality on Soil Treatment of Effluent.  Proc. NOWRA 16th Annual Technical Education & Exposition Conference.

Geza, M. and J.E. McCray (2006).  Modeling the Effect of Discharges from Septic Systems and Sewers on Stream Nutrient Loading in Turkey Creek Watershed using WARMF and SWAT.  Proc. NOWRA 16th Annual Technical Education & Exposition Conference.

Heatwole, K.K. and J.E. McCray (2006).  A Simple Model for Predicting Nitrate Plumes.  Proc. NOWRA 16th Annual Technical Education & Exposition Conference.

Lowe, K.S., R.L. Siegrist, and K.N. Tackett (2006).  Hydraulic Loading Rate and Infiltrative Surface Architecture Effects on Septic Tank Effluent Treatment During Soil Infiltration.  Proc. NOWRA 16th Annual Technical Education & Exposition Conference.

McCray, J.E. and K.K. Heatwole (2006).  Using Analytical Models for Assessment of Nitrogen Removal in the Soil Treatment Unit and Transport in Groundwater.  Proc. NOWRA 16th Annual Technical Education & Exposition Conference.

Rothe, N.K. and K.S. Lowe (2006).  Wastewater Composition and Variability as Obtained from Literature Sources.  Proc. NOWRA 16th Annual Technical Education & Exposition Conference.

Siegrist, R.L. (2006). Soil as a Treatment Media: Soil Treatment Units. Proc. NOWRA 16th Annual Technical Education & Exposition Conference.

Tomaras, J.M.B., J.R. Spear, J. McKinley, and R.L. Siegrist (2006).  Microbial Characteristics of the Wastewater-Induced Soil Biozone.  Proc. NOWRA 16th Annual Technical Education & Exposition Conference.

Walsh, D.R., K.S. Lowe, J.E. McCray, and R.L. Siegrist (2006).  Infiltrative Capacity of Receiving Media as Affected by Effluent Quality, Infiltrative Surface Architecture, and Hydraulic Loading Rate.  Proc. NOWRA 16th Annual Technical Education & Exposition Conference.

Doyle, S., J.E. McCray, K.S. Lowe, and G.D. Thyne (2005).  Modeling Phosphorus Reaction and Transport at an Experimental Onsite Wastewater Site.  Proc. NOWRA 15th Annual Technical Education & Exposition Conference.

Rauch, T. and J. Drewes (2005). Removal Mechanisms of Effluent Organic Matter during Soil Infiltration.  Proc. 5th Intern. Symp. On Management of Aquifer Recharge.  Berlin, Germany, June 2005.

Rauch, T., J. Munoz, J. Drewes, G. Amy, and H. Choi (2005).  Fate of Pharmaceuticals during Soil Infiltration Leading to Artificial Groundwater Recharge. Proc. 5th Intern. Symp. On Management of Aquifer Recharge.  Berlin, Germany, June 2005.

Rauch, T., J. Munoz, S. Wagner, J. Drewes, H. Choi, G. Amy, and E. Worch (2005).  Removal of Organic Micropollutants during Soil Infiltration.  Proc. 20th Annual Water Reuse Symposium, American Water Works Association (AWWA)/WEF/WRF.

Siegrist, R.L. (2005).  Onsite and Decentralized Wastewater Reclamation and Reuse: Critical Approaches and Technologies for a Sustainable Infrastructure. USA-Vietnam Workshop on Water Pollution Prevention Technologies.  Hanoi, Vietnam.  pp. 143-154.

Siegrist, R.L. (2005). Characterization of Wastewater Effluents for Onsite System Design. Proc. NOWRA 15th Annual Technical Education & Exposition Conference.

Siegrist, R.L. (2005). Factors Affecting Infiltration of Wastewater Effluents. Proc. NOWRA 15th Annual Technical Education & Exposition Conference.

Albert, J.M., J.M. Marr, L. Tenorio and R.L. Siegrist (2004).  Experimental and Statistical Evaluation of Bacterial Source Tracking in a Subalpine Region by rep-PCR DNA Fingerprinting.  Proc. Tenth National Symposium on Individual and Small Community Sewage Systems, American Society of Agricultural Engineers (ASAE).  pp. 470-481.

Bagdol, J.L., R.L. Siegrist, and K.S. Lowe (2004).  Mass Balance Modeling and Water Quality Monitoring for Impact Assessment of Suburban Development with Onsite Wastewater Systems Compared to Urbanized Areas with Centralized Treatment Plants.  Proc. Tenth National Symposium on Individual and Small Community Sewage Systems, ASAE.  pp. 146-155.

DeJong, K., R.L. Siegrist, L. Barber, J.E. McCray, K.S. Lowe (2004).  Occurrence and Fate of Emerging Organic Chemicals in Onsite Wastewater Systems and Implications on Water Quality Management in the Rocky Mountain Region.  Proc. Tenth National Symposium on Individual and Small Community Sewage Systems, ASAE.  pp. 400-407.

Diaz, A.D., R.L. Siegrist (2004).  Wastewater Infiltration Rate Behavior in Porous Media as Affected by Infiltrative Surface Architecture: Methods Development & Experimental Results.  Proc. Tenth National Symposium on Individual and Small Community Sewage Systems, ASAE.  pp. 210-222.

Lemonds, P.J. and J.E. McCray (2004).  Watershed-Scale Transport Modeling of Onsite Wastewater Pollutants in the Blue River Drainage Basin, Colorado.  Proc. Tenth National Symposium on Individual and Small Community Sewage Systems, ASAE.  pp. 19-26.

Siegrist R.L. and K.S. Lowe (2004). Wastewater Treatment as Affected by Infiltrative Surface Architecture and Hydraulic Loading Rate.  Proc. NOWRA 14th Annual Conference and Exposition.

Siegrist R.L. (2004). Optimizing Onsite Wastewater System Performance: Some Perspectives and Ideas.  Proc. NOWRA 14th Annual Conference and Exposition.

Smith, H.L., G.D. Thyne, J.E. McCray, K.S. Lowe, J. Guelfo, and R.L. Siegrist (2004).  Preliminary Evaluation of Anthropogenic Effects on Water Quality within the Blue River Watershed, Summit County, Colorado.  Proc. Tenth National Symposium on Individual and Small Community Sewage Systems, ASAE.  pp.668-678.

Tackett, K.N., K.S. Lowe, R.L. Siegrist, S.M. VanCuyk (2004).  Vadose Zone Treatment During Effluent Reclamation as Affected by Infiltrative Surface Architecture and Hydraulic Loading Rate.  Proc. Tenth National Symposium on Individual and Small Community Sewage Systems, ASAE.  pp. 655-667.

Van Cuyk, S. (2004).  Fate of Viruses in Onsite Systems: The Impact of Effluent Quality.  Proc. NOWRA 14th Annual Conference and Exposition.

Van Cuyk, S.M., J. Spear, R. Siegrist, and N. Pace (2004).  Molecular Analysis Of Microbial Community Associated With Laboratory 1-D Scale Wastewater Impacted Porous Media Biofilters.  Proc. Tenth National Symposium on Individual and Small Community Sewage Systems, ASAE.  pp. 387-399.

Weintraub, L.H.Z., C.W. Chen, R.A. Goldstein, and R.L. Siegrist (2004).  WARMF: A Watershed Modeling Tool for Onsite Wastewater Systems.  Proc. Tenth National Symposium on Individual and Small Community Sewage Systems, ASAE.  pp. 636-646.

Wren, A., R. Siegrist, and R. Laws (2004).  Field Performance Evaluation of Textile Filter Units Employed in Onsite Wastewater Treatment Systems.  Proc. Tenth National Symposium on Individual and Small Community Sewage Systems, ASAE.  pp. 514-525.

Lemonds, P.J., and J.E. McCray (2003). Modeling Phosphorus Transport in the Blue River Watershed, Summit County, Colorado, Presentation, First Interagency Conference on Research in the Watersheds, USDA, USGS, BLLM, NRCS, EPA, USFS, and Consortium of Universities for the Advancement of Hydrologic Science.

Siegrist, R.L. (2003).  The Role of Research in Sustaining the Future of Onsite Wastewater Systems. Proc. 12th Northwest On-Site Wastewater Treatment Shortcourse, University of Washington.

Siegrist, R.L., J. McCray, S. Van Cuyk, J. Bagdol, K.S. Lowe, P. Lemonds, L. Weintraub, C. Chen, R. Goldstein, and J. Rada (2003).  Quantifying Site-Scale Processes & Watershed-Scale Effects of Decentralized Wastewater Systems. Proc. 12th Northwest On-Site Wastewater Treatment Shortcourse, University of Washington.

Albert, J., J. Munakata-Marr, and R.L. Siegrist (2002).  Using rep-PCR as a Tool to Determine the Sources of Non-Point Fecal Contamination in Drinking Water.  Proc. WEFTEC ’02, 75th Annual Conference and Exposition, WEF.

McCray, J.E., K.S. Lowe, and R.L. Siegrist (2002).  Science and Engineering of On-Site Wastewater Treatment Systems: An Overview of Research at CSM.  Proc. 2002 Southwest Onsite Wastewater Conference.

McCray, J.E., P.J. Lemonds, D.N. Beach, S.L. Kirkland, K.S. Lowe, and R.L. Siegrist (2002).  Modeling Fate and Transport of Wastewater Pollutants at Site and Watershed Scales.  Proc. NOWRA 12th Annual Conference and Exposition.

Siegrist. R.L. (2002).  Advancing the Science & Engineering of Decentralized Wastewater Systems through Research and Education.  Proc. 1st New England Wastewater Conference.

Siegrist R.L. and J.E. McCray (2002).  Infiltration Rate Behavior during Wastewater Treatment in Soil Systems.  Proc. NOWRA 12th Annual Conference and Exposition.

Siegrist, R.L., J. McCray, S. Kirkland, R. Goldstein, C. Chen, L. Weintraub (2002).  Modeling Nitrogen Transport and Fate in Decentralized Systems at the Single Site to Watershed Scales.  Proc. 1st New England Wastewater Conference.

Siegrist, R.L., K.S. Lowe, J. McCray, D. Beach, and S. Van Cuyk (2002).  Accelerated Loading Methods to Evaluate Long-term Performance of Soil PMBs used for Wastewater Treatment.  Proc. 11th Northwest On-site Wastewater Treatment Short Course, University of Washington.

Van Cuyk, S., R.L. Siegrist, and R. W. Harvey (2002).  Fate of Viruses During Wastewater Reclamation in Small-Scale Systems that Rely on Soil Treatment Before Groundwater Recharge.  Proc. WEFTEC ’02, 75th Annual Conference and Exposition, WEF.

Weintraub, L., C.W. Chen, J. Herr, R.A. Goldstein, R. Siegrist (2002).  Modifications of WARMF to Assess the Efficacy of Onsite Wastewater Systems on Public Health.  Proc. WEFTEC ’02, 75th Annual Conference and Exposition, WEF.

Chen, C.W., L. Weintraub, R.A. Goldstein, R.L. Siegrist, and S. Kirkland (2001).  Framework to Account for Onsite Wastewater Systems in Calculating Total Maximum Daily Loads.  Proc. Ninth National Symposium on Individual and Small Community Sewage Systems, ASAE.  pp. 524-532.

Huntzinger, D., J. McCray, R.L. Siegrist and S. Van Cuyk (2001).  Mathematical Modeling of Unsaturated Flow in Wastewater Soil Absorption Systems with Clogging Zones.  Proc. Ninth National Symposium on Individual and Small Community Sewage Systems, ASAE.  pp. 106-115.

Logan, A.J., T.K. Stevik, R.L. Siegrist, and R. Ronn (2001). Transport and Fate of Cryptosporidium parvum in Intermittent Sand Filters during Wastewater Treatment.  Proc. Ninth National Symposium on Individual and Small Community Sewage Systems, ASAE.  pp. 137-146.

McCray, J.E., S. Kirkland, D. Huntzinger, and R.L. Siegrist  (2001).  Quantitative Modeling Approaches for Assessing Wastewater Flow and Pollutant Transport in Porous Media. Proc. 3rd NSF International Symposium and Technology Expo on Small Drinking Water and Wastewater Systems. pp. 10-18.

Siegrist, R.L. (2001).  Advancing the Science and Engineering of Onsite Wastewater Systems.  Proc. Ninth National Symposium on Individual and Small Community Sewage Systems, ASAE.  pp. 1-10.

Siegrist, R.L. and S. Van Cuyk (2001).  Wastewater Soil Absorption Systems: The Performance Effects of Process Design and Environmental Conditions. Proc. Ninth National Symposium on Individual and Small Community Sewage Systems, ASAE.  pp. 41-51.

Van Cuyk, S. and R.L. Siegrist (2001).  Pathogen Fate in Wastewater Soil Absorption Systems as affected by Effluent Quality and Soil Clogging Genesis.  Proc. Ninth National Symposium on Individual and Small Community Sewage Systems, ASAE.  pp.125-136.

Van Cuyk, S., R.L. Siegrist, and A.J. Logan (2001).  Evaluation of Virus and Microbial Purification in Wastewater Soil Absorption Systems using Multicomponent Surrogate and Tracer Additions. Proc. Ninth National Symposium on Individual and Small Community Sewage Systems, ASAE.  pp.30-40.

McCray, J.E., D.N. Huntzinger, S. Van Cuyk, and R.L. Siegrist (2000).  Mathematical Modeling of Unsaturated Flow and Transport in Soil-Based Wastewater Treatment Systems.  Proc. WEFTEC 2000, 73nd Annual Conference and Exhibition, WEF. 

Siegrist, R.L., J. McCray, D. Huntzinger, S. Van Cuyk, and S. Kirkland (2000).  Use of Modeling to Understand and Predict Wastewater Treatment for Onsite Wastewater Systems. Proc. NOWRA 9th Annual Conference and Exposition.  pp. 135-142.

Van Cuyk, S. and R.L. Siegrist (2000).  Pathogen Fate in Wastewater Soil Absorption Systems as affected by Pretreatment and Soil Clogging Genesis.  Proc. WEFTEC 2000, 73nd Annual Conference and Exhibition, WEF. 

Siegrist, R.L., S. Van Cuyk, A. Logan, S. Masson, and E. Fischer (1999).  Hydraulic and Purification Behavior in Wastewater Soil Treatment Systems as Affected by Infiltrative Surface Character and Vadose Zone Soil Depth.  Proc. NOWRA 8th Annual Conference and Exposition. pp. 181-189.

Van Cuyk, S., R.L. Siegrist, A. Logan, S. Masson, E. Fischer, and L. Figueroa (1999).  Purification of Wastewater in Soil Treatment Systems as affected by Infiltrative Surface Character and Unsaturated Soil Depth.  Proc. WEFTEC ’99, 72nd 73nd Annual Conference and Exhibition, WEF.