TAILIEUCHUNG - APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER

Bone Meal: Excellent slow-release source of calcium and phosphorus recommended for bulbs, tomatoes, and other vegetables. Analysis will range from 2-12-0 to 4-12-0 with 2 to 5 percent calcium. Slow release form of calcium and phosphorous. It is used for bulbs, tomatoes, and other vegetables. Analysis will range from 2-12-0 to 4- 12-0 with 2 to 5% calcium. A good calcium and phosphorus source but slower acting and more expensive than soft rock phosphate. Analysis of bone meal will vary from about 2-12-0 to 4-12-0 with 2-5 percent calcium. Young bones usually have less phosphorous and more nitrogen than older bones | APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER METHOD 613-2 3 7 8-TETRACHLORODIBENZO-P-DIOXIN 1. Scope and Application This method covers the determination of 2 3 7 8-tetrachlorodibenzo-p-dioxin 2 3 7 8-TCDD . The following parameter may be determined by this method Parameter STORET No. CAS No. 2 3 7 8-TCDD 34675 1746-01-6 This is a gas chromatographic mass spectrometer GC MS method applicable to the determination of 2 3 7 8-TCDD in municipal and industrial discharges as provided under 40 CFR Part . Method 625 may be used to screen samples for 2 3 7 8-TCDD. When the screening test is positive the final qualitative confirmation and quantification must be made using Method 613. The method detection limit MDL defined in Section 1 for 2 3 7 8-TCDD is listed in Table 1. The MDL for a specific wastewater may be different from that listed depending upon the nature of interferences in the sample matrix. Because of the extreme toxicity of this compound the analyst must prevent exposure to himself of to others by materials knows or believed to contain 2 3 7 8-TCDD. Section 4 of this method contains guidelines and protocols that serve as minimum safe-handling standards in a limited-access laboratory. Any modification of this method beyond those expressly permitted shall be considered as a major modification subject to application and approval of alternate test procedures under 40 CFR Parts and . This method is restricted to use by or under the supervision of analysts experienced in the use of a gas chromatograph mass spectrometer and in the interpretation of mass spectra. Each analyst must demonstrate the ability to generate acceptable results with this method using the procedure described in Section . 2. Summary of Method A measured volume of sample approximately 1 L is spiked with an internal standard of labeled 2 3 7 8-TCDD and extracted with methylene chloride using a

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