Cal. Code Regs. Tit. 22, § 64677 - Sample Collection Methods for Taps

(a) All tap samples for lead and copper collected pursuant to this chapter, with the exception of lead service line samples collected under section 64689 (Lead Service Line Sampling) and samples collected under subsection (d), shall be first-draw samples, pursuant to subsection (b).

(b) A first-draw sample shall be one liter in volume and have stood motionless in the plumbing system of each site for at least six hours, but not more than twelve. Samples from residential housing shall be collected from the cold-water kitchen tap or bathroom sink tap. Samples from a non-residential building shall be collected at an interior tap from which water is typically drawn for consumption. Samples may be collected by the system or the system may allow residents to collect tap samples after instructing the residents of the sampling procedures specified in this section. To avoid problems of residents handling nitric acid, acidification of samples may be done up to 14 days after collection. After acidification to resolubilize the metals, the sample shall stand in the original container for the time specified by the method used pursuant to section 64670(c) before it can be analyzed. If a system allows residents to perform sampling, the system may not challenge, based on alleged errors in sample collection, the accuracy of sampling results.

(c) A system shall collect each tap sample from the same site from which it collected a sample during the previous period. If the system cannot gain entry to a site in order to collect a tap sample, it may collect the tap sample from another site in its sampling pool as long as the new site meets the same criteria, and is as close as possible to the original site.

(d) A system that does not have enough taps to supply first-draw samples may apply to the Department in writing to substitute non-first-draw samples. Such systems shall collect as many first-draw samples as possible and identify sampling times and locations that would likely result in the longest standing time for the remaining sites.

Notes

Cal. Code Regs. Tit. 22, § 64677

1. New article 3 and section filed 12-11-95 as an emergency; operative 12-11-95 (Register 95, No. 50). A Certificate of Compliance must be transmitted to OAL by 4-9-96 or emergency language will be repealed by operation of law on the following day.
2. Refiling of 12-11-95 order, including amendment of NOTE, filed 4-9-96 as an emergency; operative 4-10-96 (Register 96, No. 15). A Certificate of Compliance must be transmitted to OAL by 8-8-96 or emergency language will be repealed by operation of law on the following day.
3. Certificate of Compliance as to 12-11-95 order, including amendment of subsection (a), transmitted to OAL 8-7-96 and filed 9-16-96 (Register 96, No. 38).
4. Repealer of article 3 (sections 64677-64678) and repealer and new section filed 9-11-2003; operative 10-11-2003 (Register 2003, No. 37).

Note: Authority cited: Sections 100275, 116350, 116365, 116375 and 116385, Health and Safety Code. Reference: Sections 116325- 116750, Health and Safety Code.

1. New article 3 and section filed 12-11-95 as an emergency; operative 12-11-95 (Register 95, No. 50). A Certificate of Compliance must be transmitted to OAL by 4-9-96 or emergency language will be repealed by operation of law on the following day.
2. Refiling of 12-11-95 order, including amendment of Note, filed 4-9-96 as an emergency; operative 4-10-96 (Register 96, No. 15). A Certificate of Compliance must be transmitted to OAL by 8-8-96 or emergency language will be repealed by operation of law on the following day.
3. Certificate of Compliance as to 12-11-95 order, including amendment of subsection (a), transmitted to OAL 8-7-96 and filed 9-16-96 (Register 96, No. 38).
4. Repealer of article 3 (sections 64677-64678) and repealer and new section filed 9-11-2003; operative 10-11-2003 (Register 2003, No. 37).