(a)
Above 3,000 feet mean sea level
* (msl), a
permissive-burn day will be declared when the following criteria are met:
(1) Near 4:00 a.m., the mean 500 millibar
(mb) height over the Basin is less than the limiting mean height given in Table
1 of section
80320.
(2) The expected 4:00 p.m. mean 500 mb height
over the Basin is less than the limiting mean height given in Table 1 of
section
80320.
(b) Below 3,000 feet
msl
*, a permissive-burn day will be declared when at
least 3 of the following criteria are met:
(1)
Near the time of day when the surface temperature is at a minimum, the
temperature at 3,000 feet above the surface is not warmer than the surface
temperature by more than 10 degrees Fahrenheit, except that during July through
November it is not warmer by more than 18 degrees Fahrenheit.
(2) The expected daytime temperature at 3,000
feet above the surface is colder than the expected surface temperature by at
least 11 degrees Fahrenheit for 4 hours.
(3) The expected daytime wind speed at 3,000
feet above the surface is at least 5 miles per hour.
(4) The expected daytime wind direction in
the mixing layer has a component from the east and a speed of 12 miles per hour
or less.
__________
* In place of the standard
3,000 feet msl level, the elevation may be specified in increments of 500 feet
on a day-to-day basis as determined from vertical temperature
soundings.
Notes
Cal. Code Regs. Tit. 17, §
80180
1.
Amendment of subsections (a)-(b), repealer of subsection (c) and new footnote
filed 3-14-2001; operative 3-14-2001 pursuant to Government Code section
11343.4
(Register 2001, No. 11).
Note: Authority cited: Sections
39600,
39601,
41856
and
41859,
Health and Safety Code. Reference: Sections
41854,
41855,
41856,
41857,
41859
and
41863,
Health and Safety Code.
1. Amendment of
subsections (a)-(b), repealer of subsection (c) and new footnote filed
3-14-2001; operative 3-14-2001 pursuant to Government Code section
11343.4
(Register 2001, No. 11).