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FSH 7409.11 - SANITARY ENGINEERING AND PUBLIC HEALTH HANDBOOK
R6 Supplement No. 7409.11-88-4
February 1988
CHAPTER 90 - RECORDS AND REPORTS
91 - WATER SYSTEMS.
91.1 - Potable Water Supply Inventory.
1. Bacteriological Monitoring Schedule, Worksheet, and Summary. Report
160, Bacteriological Monitoring Schedule, Worksheet, and Summary (Exhibit 1) is
used to record microbiological monitoring and followup actions taken at potable
water systems. When kept up to date, the report serves as a management and
program review document, as a recordkeeping device and satisfies various Federal,
State, and Manual requirements.
The purpose of the entire microbiological monitoring program is to insure
microbiologically safe water. The forms and charts serve only as a tool to meet this
objective. The major key to meeting this objective is timely and effective response
to correct a water system deficiency when the microbiological indicator suggests a
problem. Action to be taken is defined in FSM 7421.26 - Followup Action and in
FSM 7420 Table 1.-- Allowable Microbiological Contaminant Levels and Followup
Action.
Blank forms will be provided prior to the beginning of the new calendar year.
2. Instructions for Completing Report 160, Bacteriological Monitoring
Schedule, Worksheet, and Summary. The purpose of this form is to record the
microbiological monitoring and followup actions for one calendar year. Use pen or
pencil, typing is not required.
Review Exhibit 1 for general layout and information entry.
The use code must be filled in. It may or may not match the identifier code in the
water system name.
For seasonal systems, record the month and date of the first negative test taken
before the system is opened to use. Enter the month and day the system was
opened and closed to use. For systems open all year, use 1/1 and 12/31 as opening
and closing dates.
All routine tests are recorded as dates.
Circle the date of each routine positive test. A positive test is either
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a membrane filter test with one or more colonies including confluent growth or
multiple tube test with one or more positive tubes. A positive test requires an entry
in the followup action portion of the form. Consult Table 1.--Allowable
Microbiological Contaminant Levels and Followup Action in FSM 7420 for
appropriate action codes and resample actions. Record the resample results and
action taken as appropriate. Positive test results must be entered under "MF" for
membrane filter or "MT" for multiple tube technique.
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91.1 - Exhibit 01
SEE THE PAPER COPY OF THE MASTER SET
FOR SECTION 91.1 - EXHIBIT 01
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The following are allowable entries:
MF
MT
DESCRIPTION
Neg
Neg
Negative test
1-999
Number of colonies
+1 to +5
Number of positive tubes
TNTC
Too numerous to count
CG
Confluent growth
If a system is not printed on the form, then enter a system number and name on the
first blank line available. Submit Form 7400-2 Potable Water Supply Inventory to
the Regional Office to enter a new system into the inventory for next year.
See FSM 7420 for distribution of the completed Report 160.