In addition to the requirements of Section 25214.4, the following procedures shall be used for testing the following materials:
(a) For testing a metal plated with suitable undercoats and finish coats, the following protocols shall be observed:
(1) Digestion shall be conducted using hot concentrated nitric acid with the option of using hydrochloric acid or hydrogen peroxide.
(2) The sample size shall be 0.050 gram to one gram.
(3) The digested sample may require dilution prior to analysis.
(4) All necessary dilutions shall be made to ensure that measurements are made within the calibrated range of the analytical instrument.
(b) For testing unplated metal and metal substrates that are not a material listed in paragraphs (1) to (10), inclusive, of subdivision (a) of Section 25214.2, the following protocols shall be observed:
(1) Digestion shall be conducted using hot concentrated nitric acid with the option of using hydrochloric acid or hydrogen peroxide.
(2) The sample size shall be 0.050 gram to one gram.
(3) The digested sample may require dilution prior to analysis.
(4) All necessary dilutions shall be made to ensure that measurements are made within the calibrated range of the analytical instrument.
(c) For testing polyvinyl chloride (PVC), the following protocols shall be observed:
(1) The digestion shall be conducted using hot concentrated nitric acid with the option of using hydrochloric acid or hydrogen peroxide.
(2) The sample size shall be a minimum of 0.05 gram if using microwave digestion or 0.5 gram if using hotplate digestion, and shall be chopped or comminuted prior to digestion.
(3) Digested samples may require dilution prior to analysis.
(4) All necessary dilutions shall be made to ensure that measurements are made within the calibrated range of the analytical instrument.
(d) For testing plastic or rubber that is not polyvinyl chloride (PVC), including acrylic, polystyrene, plastic beads, or plastic stones, the following protocols shall be observed:
(1) The digestion shall be conducted using hot concentrated nitric acid with the option of using hydrochloric acid or hydrogen peroxide.
(2) The sample size shall be a minimum of 0.05 gram if using microwave digestion or 0.5 gram if using hotplate digestion, and shall be chopped or comminuted prior to digestion.
(3) Plastic beads or stones shall be crushed prior to digestion.
(4) Digested samples may require dilution prior to analysis.
(5) All necessary dilutions shall be made to ensure that measurements are made within the calibrated range of the analytical instrument.
(e) For testing coatings on glass and plastic pearls, the following protocols shall be observed:
(1) The coating of glass or plastic beads shall be scraped onto a surface free of dust, including a clean weighing paper or pan, using a clean stainless steel razor blade or other clean sharp instrument that will not contaminate the sample with lead or cadmium. The substrate pearl material shall not be included in the scrapings.
(2) The razor blade or sharp instrument shall be rinsed with deionized water, wiped to remove particulate matter, rinsed again, and dried between samples.
(3) The scrapings shall be weighed and not less than 50 micrograms of scraped coating shall be used for analysis. If less than 50 micrograms of scraped coating is obtained from an individual pearl, multiple pearls from that sample shall be scraped and composited to obtain a sufficient sample amount.
(4) The number of pearls used to make the composite shall be noted.
(5) The scrapings shall be digested according to EPA reference method 3050B or 3051 or an equivalent procedure for hot acid digestion in preparation for trace lead or cadmium analysis.
(6) The digestate shall be diluted in the minimum volume practical for analysis.
(7) The sample result shall be reported within the calibrated range of the instrument. If the initial test of the sample is above the highest calibration standard, the sample shall be diluted and reanalyzed within the calibrated range of the instrument.
(f) For testing dyes, paints, coatings, varnish, printing inks, or ceramic glazes, the following testing protocols shall be observed:
(1) The digestion shall use hot concentrated nitric acid with the option of using hydrochloric acid or hydrogen peroxide.
(2) The sample size shall be not less than 0.050 gram, and shall be chopped or comminuted prior to digestion.
(3) The digested sample may require dilution prior to analysis.
(4) All necessary dilutions shall be made to ensure that measurements are made within the calibrated range of the analytical instrument.
(g) For testing glass and crystal, the following protocols shall be used:
(1) For determining weight:
(A) A component shall be free of any extraneous material, including adhesive, before it is weighed.
(B) The scale used to weigh a component shall be calibrated annually by a qualified vendor using reference mass standards that are traceable to the National Institute of Standards and Technology (NIST) of the Department of Commerce or the International System of Units (SI) and shall be verified daily before weighing the component.
(C) The calibration of the scale shall be accurate to within 0.0001 gram.
(2) Both of the following testing protocols shall be observed:
(A) The glass and crystal component shall be crushed or grounded to powder form before digestion and shall be digested according to the United States Environmental Protection Agency Test Method 3052 using hydrofluoric acid in a microwave or an equivalent method to yield complete digestion.
(B) The digestate shall be diluted in the minimum volume practical for analysis.
(Amended by Stats. 2019, Ch. 379, Sec. 7. (SB 647) Effective January 1, 2020.)