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In modifying soil pH, the addition of amendments, fertilizers, tillage practices, soil organic matter levels, and drainage should all be considered. A common amendment used to acidify alkaline soils is sulfur (S) (Slaton et al., 2001). Elemental sulfur (S0 ) is oxidized by microbes to produce sulfate (SO4 2- ) and H+, causing a lower pH. Ferrous sulfate (FeSO4 ) and aluminum sulfate (Al 2 (SO4 )3 ) can also be used to lower pH, not due to SO4 , but because of the addition of acidic cations (Fe2+, Al 3+) (see Q & A #1). Application rates for these amendments will vary depending upon product properties (particle size, oxidation. | APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER METHOD 624 PURGEABLES 1. Scope and Application 1.1 This method covers the determination of a number of purgeable organics. The following parameters may be determined by this method Parameter STORET No. CAS No. Benzene 34030 71-43-2 Bromodichloromethane 32101 75-27-4 Bromoform 32104 75-25-2 Bromomethane 34413 74-83-9 Carbon tetrachloride 32102 56-23-5 Chlorobenzene 34301 108-90-7 Chloroethane 34311 75-00-3 2-Chloroethylvinyl ether 34576 110-75-8 Chloroform 32106 67-66-3 Chloromethane 34418 74-87-3 Dibromochloromethane 32105 124-48-1 1 2-Dichlorobenzene 34536 95-50-1 1 3-Dichlorobenzene 34566 541-73-1 1 4-Dichlorobenzene 34571 106-46-7 1 1-Dichloroethane 34496 75-34-3 1 2-Dichloroethane 34531 107-06-2 1 1-Dichloroethane 34501 75-35-4 trans-1 2-Dichloroethene 34546 156-60-5 1 2-Dichloropropane 34541 78-87-5 cis-1 3-Dichloropropene 34704 10061-01-5 trans-1 3-Dichloropropene 34699 10061-02-6 Ethyl benzene 34371 100-41-4 Methylene chloride 34423 75-09-2 1 1 2 2-Tetrachloroethane 34516 79-34-5 Tetrachloroethene 34475 127-18-4 Toluene 34010 108-88-3 1 1 1-Trichloroethene 34506 71-55-6 1 1 2-Trichloroethene 34511 79-00-5 Trichloroethane 39180 79-01-6 Trichlorofluoromethane 34488 75-69-4 Vinyl chloride 39175 75-01-4 1.2 The method may be extended to screen samples for acrolein STORET No. 34210 CAS No. 107-02-8 and acrylonitrile STORET No. 34215 CAS No. 107-13-1 however the preferred method for these two compounds is Method 603. 1.3 This is a purge and trap gas chromatographic mass spectrometer GC MS method applicable to the determination of the compounds listed above in municipal and industrial discharges as provided under 40 CFR Part 136.1. 1.4 The method detection limit MDL defined in Section 14.1 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. 1.5 Any .
