What does grid search mean in the following sentence?
To expedite your request for grid search, please fill out this form completely, one form for each school site, and mail it with the fee in the amount of $310.531.
PURSUANT TO CALIFORNIA EDUCATION CODE 17213, THIS REQUEST IS FOR THE IDENTIFICATION OF ALL AQMD PERMITTED FACILITIES WITH THE POTENTIAL TO EMIT HAZARDOUS AIR POLLUTANTS LOCATED WITHIN 1/4 MILE OF A SCHOOL SITE
AQMD is 'South Coast Air Quality Management District' - basically just in case there are any air-polluting sites within 1/4 mile of a school, you have to pay for AQMD to search the ground for such plants. They have divided the ground into grids, based on squares of 1/4 mile radius.