26.16.07.07

.07 Standard Sampling Method.

A. Schools shall collect samples in accordance with the following procedures:

(1) Collect 250 mL first-draw samples in prelabeled sampling bottles.

(2) Collect samples from the cold water tap.

(3) If the outlet has an aerator, leave the aerator in place during sampling.

(4) If the outlet has a filter, sample without the filter.

(5) Determine if one chiller serves more than one fountain; if it does, collect first-draw samples from each fountain.

(6) Follow all laboratory or Department instructions for collecting, handling, and submitting water samples.

(7) Samples must be acidified within 14 days of collection unless sample bottles are pre-acidified by the laboratory.

B. Schools shall ensure that samples have appropriate water age in the following ways:

(1) Collect samples of water that have been sitting in pipes for at least 8 hours but not more than 18 hours.

(2) Samples may be collected from outlets in which the water exceeds the 18 hour stagnation period if these outlets are used infrequently, and this stagnation period represents normal use patterns.

C. Schools shall ensure that samples are analyzed:

(1) By a laboratory certified by the Department for lead analysis;

(2) Within 6 months of preservation; and

(3) In accordance with EPA method 200.8, EPA method 200.9, or current method approved in 40 CFR §141.23 or COMAR 26.04.01.01-1.

D. Schools shall complete the following records for each sample collected:

(1) Record the type of sample;

(2) The building address;

(3) The location within the building;

(4) The specific tap tested;

(5) The date and time the water was last used;

(6) The date and time the sample was collected;

(7) The name and contact information of the sample collector for each sample collected, as indicated in guidance developed by the Department; and

(8) The completed chain of custody form.