EP 1110-1-27
27 Jan 00
e. Purge water handling. Any purge water should be disposed of properly in wastewater
treatment or surface spreading on soil. The definition of "properly" will depend on the chemical mixtures,
their chemical properties (e.g., pH), and the sensitivity of the treatment or land system. Discharge to any
surface waters must be avoided. Phosphate-loaded water discharged to surface waters can cause algal
blooms and oxygen depletion, resulting in suffocation of aquatic animals. Additionally, pH shock is toxic
to aquatic life, and turbidity can suffocate.
6-2 Use and Interpretation of MSDS
a. Requirement. Having MSDS on hand is a requirement of governing agencies (including
USACE) and a central feature in safety plans involving chemical safety. The Occupational Safety and
Health Administration (OSHA) requires the MSDS to accompany each container of reactive chemical
from point of origin to point of consumption or final disposal. Each person handling each chemical must
verify that he/she has read the MSDS, or has had it read to him/her and that he/she understands the
precautions necessary.
concerns, and neutralization recommendations, and to provide information on basic physical properties
(e.g., the relatively high freezing temperature of organic acids). The MSDS of proprietary chemical
blends also permits interpretation of their contents and modes of operation in treatment.
6-3 Calculation Work Sheets
This pamphlet provides calculations for well volume dosages, and includes well volume/foot tables for
common well diameters. These are found in Appendix D. Appendix C offers recipes for commonly used
mixtures.
6-5
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