pnnl 15431 the second generation model data parameters and implementation ronald d sands 1 allen a fawcett 2 october 2005 prepared for united states environmental protection agency under contracts agrdw89921669 agrdw89921964 joint global change research institute college park md pacific northwest national laboratory operated by battelle us department of energy university maryland 8400 baltimore avenue suite 201 20740 usa 1200 pennsylvania ave nw 6207j washington dc 20460 views authors do not necessarily represent government or legal notice this report was memorial batelle as an account sponsored activities neither client nor any person acting on behalf either makes warranty representation express implied with respect to accuracy completeness usefulness information contained in that use apparatus product composition disclosed may infringe privately owned rights assumes liabilities damages resulting from