THIS STATEMENT OF WORK DESCRIBES THE EFFORTS OF THE WHOLE AIR SAMPLING (WAS) ACTIVITY AS PART OF THE DCOTSS PROJECT. THE WAS EFFORT IS DESIGNED TO PROVIDE CHEMICAL CHARACTERIZATION OF THE VOLATILE ORGANIC TRACE GASES IN THE UT/LS REGIONS STUDIED DURING DCOTSS IN ORDER TO BETTER UNDERSTAND THE ORIGINS FATE AND PROCESSING OF AIR MASSES TRANSPORTED TO THE UT/LS.