TAILIEUCHUNG - THE METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER

It is important to understand at the outset the natural hydrochemical conditions that exist in aquifer systems, as these provide the necessary baseline from which quality changes caused by human impacts can be determined. The natural hydrochemical conditions may also affect the behaviour of some pollutants. Because groundwater movement is typically slow and residence times long, there is potential for interaction between the water and the rock material through which it passes. The properties of both the water and the material are therefore important, and natural groundwater quality will vary from one rock type to another and within. | APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER METHOD 6O8 ORGANOCHLORINE PESTICIDES AND PCBS 1. Scope and Application This method covers the determination of certain organochlorine pesticides and PCBs. The following parameters can be determined by this method Parameter STORET No. CAS No. Aldrin 39330 309-00-2 a-BHC 39337 319-84-6 P-BHC 39338 319-85-7 0-BHC 34259 319-86-8 Y-BHC 39340 58-89-9 Chlordane 39350 57-74-9 4 4 -DDD 39310 72-54-8 4 4 -DDE 39320 72-55-9 4 4 -DDT 39300 50-29-3 Dieldrin 39380 60-57-1 Endosulfan I 34361 959-98-8 Endosulfan II 34356 33212-65-9 Endosulfan sulfate 34351 1031-07-8 Endrin 39390 72-20-8 Endrin aldehyde 34366 7421-93-4 Heptachlor 39410 76-44-8 Heptachlor epoxide 39420 1024-57-3 Toxaphene 39400 8001-35-2 PCB-1016 34671 12674-11-2 PCB-1221 39488 1104-28-2 PCB-1232 39492 11141-16-5 PCB-1242 39496 53469-21-9 PCB-1248 39500 12672-29-6 PCB-1254 39504 11097-69-1 PCB-1260 39508 11096-82-5 This is a gas chromatographic GC method applicable to the determination of the compounds listed above in municipal and industrial discharges as provided under 40 CFR Part . When this method is used to analyze unfamiliar samples for any or all of the compounds above compound identifications should be supported by at least one additional qualitative technique. This method describes analytical conditions for a second gas chromatographic column that can be used to confirm measurements made with the primary column. Method 625 provides gas chromatograph mass spectrometer GC MS conditions appropriate for the qualitative and quantitative confirmation of results for all of the parameters listed above using the extract produced by this method. The method detection limit MDL defined in Section 1 for each parameter is listed in Table 1. The MDL for a specific wastewater may differ from those listed depending upon the nature of interferences in the sample matrix. The sample extraction and .

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