The City has implemented a new 24/7 hotline system for dust control. All construction sites larger than 1 acre are required to have a sign on the site containing the telephone number of the person in charge of dust control on the site. Please call the contractor’s telephone number first, but if you get no response, or an inadequate response, you may call the City’s PM 10 Fugitive Dust Control Hotline (760) 416-5315.
- City of La Quinta Municipal Code Section 6.16 PM 10 Ordinance Fugitive Dust Control
Visit the South Coast Air Quality Management District website to view the final 2003 Coachella Valley PM 10 State Implementation Plan.
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The City of La Quinta is located within the jurisdiction of the Coachella Valley and is thereby impacted by the particulate matter (PM) control measures delineated in the Coachella Valley State Implementation Plan (SIP). The City of La Quinta has adopted an Ordinance, control measures and operating practices that require street sweeping as an air pollution reduction control measure specifically targeting PM10.
PM10 is a pollutant that poses a significant health risk. PM10 is emitted from motor vehicles and other sources, one of which is “blow sand” deposited on roads and arterial highways. As vehicles travel over the roads, the sand is subsequently ground into fine particulates and blown back or “re-entrained” into the atmosphere. Frequent street sweeping is an effective strategy for reducing re-entrained road dust and mitigating airborne PM10.
PM10 refers to particles with an aerodynamic diameter of 10 microns or smaller. For comparison, the diameter of a human hair is about 50 to 100 microns. Exposure to PM10 aggravates a number of respiratory illnesses and may even cause early death in people with existing heart and lung disease. PM10 includes the subgroup of finer particles with aerodynamic diameter of 2.5 microns and smaller (PM2.5). These finer particles pose an increased health risk because they can deposit deep in the lung and contain substances that are particularly harmful to human health. PM is a mixture of substances that include elements such as carbon and metals; compounds such as nitrates, organic compounds, and sulfates; and complex mixtures such as diesel exhaust and soil. These substances may occur as solid particles or liquid droplets. Some particles are emitted directly into the atmosphere. Others, referred to as secondary particles, result from gases that are transformed into particles through physical and chemical processes in the atmosphere.
AIR QUALITY EFFORTS:
The City of La Quinta has retrofitted three (3) of its heavy-duty on-road diesel vehicles (two dump trucks and one water truck) with Cleaire Vista 3 filters. These filters are specifically designed to provide diesel particulate matter (PM) reductions for in-use diesel enigines for older vehicles. The active regeration system uses diesel fuel, combined with an integrated diesel burner element, to "cook off" the captured diesel particulate when the vehicle is not operating resulting in cleaner air. The City of La Quinta was successful in receiving partial sponsorship funding to offset the cost of retrofitting the three vehicles with the Cleiare Vista 3 Filters from the Mobile Source Air Pollution Reduction Review Committee or MSRC.