Mitchell, Mark K., and William B. Stapp. Field Manual for Water Quality Monitoring. Dubuque, IA: Kendall/Hunt Publishing Co., 1997.
EPA Ground Water and Drinking Water. 5-06-04. EPA. 6-15-04. <http://www.epa.gov/safewater/mcl.html>.
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| References | ||||
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Mitchell, Mark K., and William B. Stapp. Field Manual for Water Quality Monitoring. Dubuque, IA: Kendall/Hunt Publishing Co., 1997. |
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EPA Ground Water and Drinking Water. 5-06-04. EPA. 6-15-04. <http://www.epa.gov/safewater/mcl.html>. |
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