User Guide to Thresholds and Classification - Environmental ...

More documents

Recommendations

Info

396User Guide for Thresholds and Classifications0.0001 < EC 50 0.001 1,0000.00001 < EC 50 0.0001 10,000(continue in factor 10 intervals)Note: EC 50 = median effect concentration. [where appropriate, ie for microbial function data, the EC 25 value can beused]Table 20.6: Example calculation for soil hazard classification of mixture Y containing one highly toxic componentComponentL(E)C 50(mg/kg)Soilclassificationof individualcomponentComponentwith DT 50>30 days*Concentration ofcomponent inmixture(%)Multiplyingfactor (M)(from Error!Referencesource notfound.)B 5 9.2B No 5 1 5P 0.02 9.2A Yes 0.05 10 0.5Q 0.9 9.2A No 1 1 1T 50 9.2C Yes 40 1 40U 200 Not classified No 53.95 1 53.95Adjustedconcentrationof componentin mixture(M x %)Note:*where no data on degradation, the default applies, ie the substance is considered to have DT 50 >30 daysL(E)C 50 = median lethal concentration or median effect concentration. [where appropriate, ie for microbial functiondata, the EC 25 value can be used]The steps to follow in applying the summation approach to soil hazard classification for mixtures with highlytoxic components are set out below, using the information from Table 20.6.Step 1Component P is highly ecotoxic and attracts a multiplier of 10, resulting in a weighted concentration ofthat component of 0.5%.Component Q, although classified as 9.2A does not attract a multiplier, that is:(10 x P) + Q(10 x 0.05%) + 1% = 1.5%, which is < 25%Therefore mixture Y is not classified as 9.2A.Step 2: Consider components classified as 9.2A and 9.2B.10((10 x P) + Q) +B10((10 x 0.05%) +1%) + 5% = 15% + 5% = 20%which is
397User Guide for Thresholds and ClassificationsSo mixture Y is classified as 9.2C unlessConsider the weighted sum of components with DT 50 >30 daysMixture Y contains two components with a DT 50 of >30 days (components P and T). The weighted sumfor these components100(0.05 x 10) + 40 = 90%, which is >25%therefore the mixture retains the 9.2C classification.Figure 20.2: Classification of mixtures for hazards to the soil environmentNotes: M = multiplying factor.January 2012 EPA0109
Page 1 and 2:
Thresholds and ClassificationsUnder
Page 3 and 4:
3User Guide for Thresholds and Clas
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
11User Guide for Thresholds and Cla
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21:
Page 24 and 25:
Page 26 and 27:
Page 28 and 29:
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
Page 46 and 47:
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
Page 54 and 55:
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
Page 62 and 63:
Page 64 and 65:
Page 66 and 67:
Page 68 and 69:
Page 70 and 71:
Page 72 and 73:
Page 74 and 75:
Page 76 and 77:
Page 78 and 79:
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
Page 86 and 87:
Page 88 and 89:
Page 90 and 91:
Page 92 and 93:
Page 94 and 95:
Page 96 and 97:
Page 98 and 99:
Page 100 and 101:
100User Guide for Thresholds and Cl
Page 102 and 103:
Page 104 and 105:
Page 106 and 107:
Page 108 and 109:
Page 110 and 111:
Page 112 and 113:
Page 114 and 115:
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Page 132 and 133:
Page 134 and 135:
Page 136 and 137:
Page 138 and 139:
Page 140 and 141:
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
Page 152 and 153:
Page 154 and 155:
Page 156 and 157:
Page 158 and 159:
Page 160 and 161:
Page 162 and 163:
Page 164 and 165:
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
Page 172 and 173:
Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
Page 182 and 183:
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
Page 202 and 203:
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212 and 213:
Page 214 and 215:
Page 216 and 217:
Page 218 and 219:
Page 220 and 221:
Page 222 and 223:
Page 224 and 225:
Page 226 and 227:
Page 228 and 229:
Page 230 and 231:
Page 232 and 233:
Page 234 and 235:
Page 236 and 237:
Page 238 and 239:
Page 240 and 241:
Page 242 and 243:
Page 244 and 245:
Page 246 and 247:
Page 248 and 249:
Page 250 and 251:
Page 252 and 253:
Page 254 and 255:
Page 256 and 257:
Page 258 and 259:
Page 260 and 261:
Page 262 and 263:
Page 264 and 265:
Page 266 and 267:
Page 268 and 269:
Page 270 and 271:
Page 272 and 273:
Page 274 and 275:
Page 276 and 277:
Page 278 and 279:
Page 280 and 281:
Page 282 and 283:
Page 284 and 285:
Page 286 and 287:
Page 288 and 289:
Page 290 and 291:
Page 292 and 293:
Page 294 and 295:
Page 296 and 297:
Page 298 and 299:
Page 300 and 301:
Page 302 and 303:
Page 304 and 305:
Page 306 and 307:
Page 308 and 309:
Page 310 and 311:
Page 312 and 313:
Page 314 and 315:
Page 316 and 317:
Page 318 and 319:
Page 320 and 321:
Page 322 and 323:
Page 324 and 325:
Page 326 and 327:
Page 328 and 329:
Page 330 and 331:
Page 332 and 333:
Page 334 and 335:
Page 336 and 337:
Page 338 and 339:
Page 340 and 341:
Page 342 and 343:
Page 344 and 345:
Page 346 and 347: 346User Guide for Thresholds and Cl
Page 438: BP House, (Level 1), 20 Customhouse
show all

User Guide to Thresholds and Classification - Environmental ...

Create successful ePaper yourself

Delete template?

Save as template?