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1 <br /> ' LLNL Environmental Restoration.Division (ERD) <br /> Standard Operating Procedure (SOP) <br /> ' ERD SOP 2.10: Well Disinfection and Coliform Bacteria <br /> ' Sampling-Revision: 3 <br /> AUTHOR(S): <br /> R. Goodrich <br /> APPROVALS: Date <br /> ,r �o •/� <br /> 2° ��1� T <br /> CONTROLLED G 11n ,�-Cdr++CystC. `rhh3 <br /> ' 2 COPY N Division Leac r <br /> W <br /> ' THIS AMPS A <br /> STAMP ! <br /> Environmental Chemistry <br /> ERD and Biology Group Leader <br /> CONCURRENCE: Date <br /> /2Z/O 3 <br /> ' QA Implementation <br /> Coordinator (Acting) <br /> ' 1.0 PURPOSE <br /> The pw•pose of this SOP is to describe a chlorination procedure to disinfect monitor wells prior <br /> to collecting ground water samples that will be analyzed for coliform bacteria as recommended <br /> di <br /> ' in Appene C of the manual, "Water Well Standards: State of California." <br /> 2.0 APPLICABILITY <br /> This SOP procedure is applicable to the disinfection of monitor wells prior to sampling for total <br /> and fecal coliform bacteria. <br /> 3.0 REFERENCES <br /> 3.1 Driscoll, G. F. (1986), Groundwater and Wells, Second Edition. Johnson Division, St. <br /> Paul, Minn. <br />