Add UK tier 1 drainage PEC calculations

1 files changed, 42 insertions, 0 deletions

diff --git a/pkg/R/SSLRC_mobility_classification.R b/pkg/R/SSLRC_mobility_classification.R
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+++ b/pkg/R/SSLRC_mobility_classification.R
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+# Copyright (C) 2015  Johannes Ranke
+# Contact: jranke@uni-bremen.de
+# This file is part of the R package pfm
+
+# This program is free software: you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation, either version 3 of the License, or (at your option) any later
+# version.
+
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+
+# You should have received a copy of the GNU General Public License along with
+# this program. If not, see <http://www.gnu.org/licenses/>
+
+#' Determine the SSLRC mobility classification for a chemical substance from its Koc
+#'
+#' This implements the method specified in the UK data requirements handbook and was 
+#' checked against the spreadsheet published on the CRC website
+#'
+#' @param Koc The sorption coefficient normalised to organic carbon in L/kg
+#' @return A list containing the classification and the percentage of the
+#'   compound transported per 10 mm drain water
+#' @export
+#' @author Johannes Ranke
+#' @examples
+#' SSLRC_mobility_classification(Koc)
+SSLRC_mobility_classification <- function(Koc)
+{
+  if (!is.numeric(Koc) | length(Koc) != 1) stop("Please give a single number")
+  result <- list("Non mobile", 0.01)
+  if (Koc < 4000) result <- list("Slightly mobile", 0.02)
+  if (Koc < 1000) result <- list("Slightly mobile", 0.5)
+  if (Koc < 500) result <- list("Moderately mobile", 0.7)
+  if (Koc < 75) result <- list("Mobile", 1.9)
+  if (Koc < 15) result <- list("Very mobile", 1.9)
+  names(result) <- c("Mobility classification", 
+                     "Percentage drained per mm of drain water")
+  return(result)
+}