Sample Site Plans

1
Sample Site Plans
2
Site Sampling Plans

• Requirement of Total Coliform Rule
• Effective September 1, 1992
• Plan identifies representative sites in the
  distribution system for sampling
• Subject to DHS/LPA review, revision and approval

3
Site Sampling Plans

• Plan shall be in the form of a distribution
  system map, street map, and or system schematic

4
Site Sampling Plans Map

• Map must cover the entire water system and
  include
• Water sources and types (well, spring, intake
• Treatment facilities filters, chlorination,
  etc.
• Storage tanks/reservoirs
• Pressure reducing stations
• Booster Stations
• Routine and repeat sampling sites
• of samples required to be collected
• Total population served
• Procedures for handling notification

5
Did you Forget?

• Number of routine samples required each month is
  based upon population or service connections
• Population Service Number
• Served Connections Samples
• 25 to 1,000 15 to 400 1
• 1,001 to 2,500 401 to 890 2
• 2,501 to 3,300 891 to 1180 3
• 3,301 to 4,100 1181 to 1460 4
• 4,101 to 4,900 1461 to 1750 5
• gt 4,901 See CCR Title 22 Table 64423-A

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Site Sampling Plans Routine Sampling Sites

• Identify representative sites throughout the
  distribution system
• Include locations along dead ends
• Do not use the last connection
• Do not use the source(s)
• Consider repeat sampling locations upstream
  downstream locations

7
Site Sampling Plans Routine Sampling Sites

• Number of representative sites may be greater
  than the required number of monthly samples
• Rotate sampling sites by identifying different
  locations every month
• Provide description of sample site rotation

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Site Sampling Plans Routine Sampling Sites

• List all routine and repeat sampling sites
• List the monthly rotation of sites
• Rotation scheme should cover a 12-month calendar
  year
• Assumed to be repeated each year thereafter

9
Palo Verde CWD PWS CA 1300616 Population
400 Service Connections 127 Water source 2
Groundwater wells Treatment Chlorination (gas)
Iron Removal (sand pressure filter) Distribution
Storage Hydropneumatic tank (2000 gal)

• Positive Coliform Response Procedure
• On notice from the lab of a positive routine
  sample the duty operator will
• Check system for possible source of
  contamination, correct problems as necessary
• Take repeat samples at Routine location, Repeat
  1, Repeat 2 and Repeat 3 locations within 24
  hours.
• Notify President of CWD 555-1111 and LPA 555-2222
  when repeats were taken

8 ACP
6 ACP
Repeat 1 117 Sunset Way
Routine Sample123 Sunset Way
PVCWD Monitoring Plan Samples Required per month
1 Routine Sample Location123 Sunset Way
Repeat Sample 1 117 Sunset Way Repeat Sample
2 127 Sunset Way Repeat Sample 3 Treatment
plant effluent tap
Repeat 2 127 Sunset Way
Repeat Sample 3 Treatment plant effluent tap
Wells and Treatment plant
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Site Sampling Plans Revisions

• Sample siting plans may be changed
• Due changes in system
• Due to growth
• At least once every 10 years submit modified plan
  to DHS/LPA for review and approval