Section 611.606 Confirmation Samples

Section 611

TITLE 35: ENVIRONMENTAL PROTECTION

SUBTITLE F: PUBLIC WATER SUPPLIES

CHAPTER I: POLLUTION CONTROL BOARD

PART 611 PRIMARY DRINKING WATER STANDARDS

SECTION 611.606 CONFIRMATION SAMPLES

Section 611.606  Confirmation

Samples

a)         If the results of sampling for antimony, arsenic, asbestos,

barium, beryllium, cadmium, chromium, cyanide, fluoride, mercury, nickel,

selenium, or thallium indicate a level in excess of the MCL, the supplier must

collect one additional sample as soon as possible after the initial sample was

taken (but not to exceed two weeks) at the same sampling point.

b)         If nitrate or nitrite sampling results indicate a level in

excess of the MCL, the supplier must take a confirmation sample within 24 hours

after the supplier's receipt of notification of the analytical results of the

first sample.

1)         Suppliers unable to comply with the 24-hour sampling

requirement must immediately notify the persons served in compliance with

Section 611.902 and meet other Tier 1 public notification requirements under

Subpart V of this Part.

2)         Suppliers exercising this option must take and analyze a

confirmation sample within two weeks after notification of the analytical

results of the first sample.

c)         Averaging rules are specified in Section 611.609.  The Agency

must delete the original or confirmation sample if it determines that a

sampling error occurred, in which case the confirmation sample will replace the

original sample.

BOARD NOTE:

Derived from 40 CFR 141.23(f).