Cal. Code Regs. tit. 13, § 2273
(a) MTBE labeling requirement. All devices dispensing gasoline containing methyl tertiary butyl ether (MTBE) at filling stations, garages or other outlets where petroleum products are sold or offered for retail shall be marked with a conspicuous label at all times the product is offered for retail sale.
(b) Residual levels of MTBE.
(2) The labeling requirements in section 2273(a) do not apply where the equipment is dispensing gasoline from a storage tank containing gasoline having an MTBE content of less than 3.0 percent by volume, as determined by a test method identified in section 2273(b)(1), and the operator of the retail outlet demonstrates that the conditions in either section 2273(b)(2)(A), (B), (C) or (D) have occurred.
(A) The gasoline storage tank has been consecutively drained and refilled to at least 95 percent of capacity with gasoline containing less than 0.6 volume percent MTBE as specified in the following table.
The percent of the total gasoline storage tank capacity that is emptied prior to refilling
The consecutive number of times the gasoline storage tank must be drained and refilled
90%
2
80%
3
70%
3
60%
4
50%
6
40%
8
30%
11
20%
19
10%
60
(B) The gasoline storage tank has been consecutively drained and refilled to at least 95 percent of capacity with gasoline containing less than 0.6 volume percent MTBE according to the following equation.
N = -(0.222) + log CO)/log (VL/VT)
Where:
N = The number of times the gasoline storage tank must be drained and refilled. If the resultant number is not an integer, it shall be rounded up to the nearest integer.
CO = The initial concentration, in volume percent, of MTBE in the gasoline storage tank.
VL = The volume of gasoline (in gallons) left in the gasoline storage tank after each draining.
VT = 95% of the capacity (in gallons) of the gasoline storage tank.
(C) The following equation has been applied to consecutive drainings and fillings of the gasoline in the storage tank, and the equation shows an MTBE content of less than 0.6 percent by volume. The initial MTBE concentration (CO) of the gasoline in the storage tank when the equation is first applied shall be deemed to be 15 volume percent unless the MTBE content is determined in accordance with a testing methodology identified in section 2273(b)(1). For purposes of the equation, [i] the MTBE concentration of gasoline containing less than 0.6 volume percent MTBE shall be deemed to be zero, and [ii] the MTBE concentration of gasoline delivered with an invoice or other documentation stating that the gasoline contains MTBE shall be deemed to be 15 volume percent or, if the concentration of MTBE is stated on the documentation, that stated concentration. The executive officer shall make available upon request a computer program that may be used in applying the equation.
C = CO(VL/(VL+VD)) + CD(VD/(VL+VD))
Where:
C = The final concentration, in volume percent, of MTBE in the gasoline storage tank after the fuel delivery.
CO = The initial concentration, in volume percent, of MTBE in the gasoline storage tank before the fuel delivery.
CD = The concentration, in volume percent, of MTBE in the fuel being delivered to the gasoline storage tank.
VL = The volume of gasoline (in gallons) left in the gasoline storage tank prior to fuel delivery.
VD = The volume of gasoline (in gallons) delivered to the gasoline storage tank.
(d) Deliveries of gasoline to retail outlets.
(2) No person shall deliver gasoline containing 0.6 percent by volume or more MTBE to a storage tank at a retail gasoline outlet unless at the time of the delivery either:
Note: Authority cited: Sections 39600, 39601, 43013, 43018 and 43101, Health and Safety Code; and Western Oil and Gas Ass'n v. Orange County Air Pollution Control District, 14 Cal.3d 411, 121 Cal. Rptr. 249 (1975). Reference: Sections 39000, 39001, 39002, 39003, 39010, 39500, 39515, 39516, 41511, 43000, 43016, 43018 and 43101, Health and Safety Code; and Western Oil and Gas Ass'n v. Orange County Air Pollution Control District, 14 Cal.3d 411, 121 Cal. Rptr. 249 (1975).
1. New section filed 11-16-99; operative 12-16-99 (Register 99, No. 47).
2. Amendment of subsections (b)(1) and (d)(1) filed 8-20-2001; operative 8-20-2001 pursuant to Government Code section 11343.4 (Register 2001, No. 34).
3. Amendment of subsections (a)(1) and (d)(1) filed 5-1-2003; operative 5-1-2003 pursuant to Government Code section 11343.4 (Register 2003, No. 18).
4. Amendment of subsections (b)(1) and (d)(1) filed 8-29-2008; operative 8-29-2008 pursuant to Government Code section 11343.4 (Register 2008, No. 35).