Cal. Health & Safety Code § 25198

(a) For purposes of this section, “state department” means the State Department of Health Services.
(b) Except as provided in subdivision (c), the analysis of any material required by this chapter shall be performed by a laboratory certified by the state department pursuant to Article 3 (commencing with Section 100825) of Chapter 4 of Part 1 of Division 101, except that laboratories previously issued a certificate under this section shall be deemed certified until the time that certification under Article 3 (commencing with Section 100825) of Chapter 4 of Part 1 of Division 101 has been either granted or denied, but not beyond the expiration date shown on the certificate previously issued under this section.
(c) The requirements of subdivision (b) shall not apply to analyses performed by a laboratory pursuant to the facility’s waste analysis plan, that is prepared in accordance with the regulations adopted by the Department of Toxic Substances Control pursuant to this chapter, if both of the following conditions are met:
1. (1) The laboratory is owned or operated by the same person who owns or operates the facility at which the waste will be managed, and the facility is a hazardous waste treatment, storage, or disposal facility that is required to obtain a hazardous waste facilities permit pursuant to Article 9 (commencing with Section 25200).
2. (2) The analysis is conducted for any of the following purposes:
  1. (A) To determine whether a facility will accept the hazardous waste for transfer, storage, or treatment, as described in paragraph (3) of subdivision (a) of Section 66264.13 of, and paragraph (3) of subdivision (a) of Section 66265.13 of, Title 22 of the California Code of Regulations, as those sections read on January 1, 2001.
  2. (B) To ensure that the analysis used to determine whether a facility will accept the hazardous waste for transfer, storage, or treatment is accurate and up to date, as described in paragraph (4) of subdivision (a) of Section 66264.13 of, and paragraph (4) of subdivision (a) of Section 66265.13 of, Title 22 of the California Code of Regulations, as those sections read on January 1, 2001.
  3. (C) To determine whether the hazardous waste received at the facility for transfer, storage, or treatment matches the identity of the hazardous waste designated on an accompanying manifest or shipping paper, as described in paragraph (5) of subdivision (a) of Section 66264.13 of, and paragraph (5) of subdivision (a) of Section 66265.13 of, the California Code of Regulations, as those sections read on January 1, 2001.
(d) An analysis performed in accordance with subdivision (c) is not an analysis performed for regulatory purposes within the meaning of paragraph (19) of subdivision (c) of Section 100825.
(e) The exemption provided by subdivision (c) does not exempt the analyses of waste for purposes of disposal from the requirements of subdivision (b) requiring certified laboratory analyses. The analyses described in subdivision (c) are not exempt from any other requirement of law, regulation, or guideline governing quality assurance and quality control.
(f) No person or public entity of the state shall contract with a laboratory for environmental analyses for which certification is required pursuant to this chapter, unless the laboratory holds a valid certificate.