Section 19515.5.

Chemical Composition

		Tolerance
		(+ or -
Oxides	Percentage Weight	Percentage Range)
Silicon Dioxide	66-75	1.00
Aluminum Oxide	0-7	0.50
Calcium Oxide	5-15	0.50
Magnesium Oxide	0-5	0.50
Sodium Oxide	8-18	0.50
Potassium Oxide	0-4	0.50
Iron Oxide	less than 0.5	0.05
Chromium Oxide	less than 0.1	0.02
Sulfur Trioxide	less than 0.2	0.02
All other oxides	less than 0.1	0.02
Organic Carbon	less than 0.1	0.02
Moisture Content	less than 0.5	0.05
(No caking with free-flowing fiberglass)
Loss on Ignition	less than 1.0	0.10

(Added by Stats. 1991, Ch. 706, Sec. 1.)