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Evaluation of gases via Method E

Evaluation of gases via Method E. UL Jeff Hebenstreit 12/02/2009. Background. Utility contacted UL Concern surrounding contaminants in chlorine Provided a study suggesting a concentration effect of Carbon Tetrachloride. Concerns.

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Evaluation of gases via Method E

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  1. Evaluation of gases via Method E UL Jeff Hebenstreit 12/02/2009

  2. Background • Utility contacted UL • Concern surrounding contaminants in chlorine • Provided a study suggesting a concentration effect of Carbon Tetrachloride.

  3. Concerns • A product could meet the requirements of the standard, if prepared from a full cylinder, where it truly may be non-compliant. • As product is used, compliant products can become non-compliant, depending on the application method.

  4. Modified Test Method • Gases prepped via method E • Prepared sample from full cylinder • Vented cylinder to near empty • Prepared a second sample • Analyzed via EPA method 524.2

  5. Results

  6. Results

  7. AWWA B301-04 Section 4.3, Impurities – Liquid chlorine: a.Moisture ≤ 150 ppm b.Heavy Metals, sum of all ≤ 30 ppm c.Lead ≤ 10 ppm d.Mercury ≤ 1 ppm e.Arsenic ≤ 3 ppm f.Nonvolatile residue ≤ 50 ppm mfrd rail/tank cars or ≤ 150 ppm cylinders g.Carbon tetrachloride ≤ 100 ppm h. Trihalomethanes ≤ 300 ppm

  8. Examples

  9. Recommendation • Formation of a Task Group • Reach out to AWWA

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