Salton Sea Air Quality Status and Activities Earl

Salton Sea Air Quality: Status and Activities Earl Withycombe California Air Resources Board October 4, 2017 1

Salton Sea Air Quality Monitoring Network Parameters Monitored: PM 10, PM 2. 5, Meteorology 2

Prevailing Wind/PM 10 Directions 3

2016 PM 10 Statistics Salton Sea, Coachella Valley, Imperial Valley 2016 Maximum 24 -Hour and Annual Average PM 10 Concentrations, and Number of Days Above 150 μ/m 3 PM 10 (AQMIS Filters) Maximum 24 -Hour Annual Average Station PM 10 Concentration (µ/m 3) Number of Days Above 150 μg/m 3 Salton Sea Bombay Beach Naval Test Base Salton City Salton Sea Park Sonny Bono Torres Martinez 760 5021 3072 630 691 350 33. 1 96. 1 125. 8 26. 4 44. 9 30. 5 6 38 45 2 10 4 Coachella Valley Indio Mecca 393 311 39. 0 43. 5 2 4 Palm Springs 447 24. 3 4 Imperial Valley Brawley Niland Westmorland El Centro 430 393 529 208 51. 9 45. 8 51. 0 44. 4 16 9 13 11 Calexico 239 59. 7 9 4

5

6

Windblown Dust Dynamics - General 7

Salton City Monitor May 2012 Monitor Sand Dunes August 2014 8

On-Playa Dust Emission Testing Source: IID Playa Locations Tested in 2015 Portable Wind Tunnel (PI-SWERL) Source: IID 9

Off-Playa Wind and Sand Monitoring Portable Wind Monitor Tower Source: IID Sand Movement Monitoring Station Source: IID 10

Red Hill 360° Livecam Source: IID 11

Toxic Pollutant Monitoring Projects • University of California Riverside – Soil Samples and Filters from 17 Monitoring Days in 2015 Analyzed – Results Similar to Sediment Studies • Imperial Irrigation District: – USEPA Grant Funding – 2 Stationary and 8 Portable PM 10 monitors – XRF Analysis of High Wind/High PM 10 Day Filters 12

UC Riverside Study Results • Levels of toxic metals measured (arsenic, cadmium, copper, lead, nickel and zinc) are all below state thresholds of concern • Levels of sodium, calcium, and selenium are much higher in playa soils than desert soils • Levels of aluminum, iron, potassium, vanadium, and chromium are higher in desert soils than playa soils • Sampling and analysis methods for pesticides are being developed for playa testing 13

IID Salton Sea Toxic Pollutant Monitoring Project Sequential PM 10 Filter Sampler Video Camera Portable PM 10 Filter Sampler 14