CHEMICAL AGENT PERSISTENCY 19 AUG 90

File: 970815_sep96_decls38_0003.txt
Page: 0003
Total Pages: 6
Subject = CHEMICAL AGENT PERSISTENCY   19 AUG 90                          

Parent Organization = ARCENT      

Unit = XVIII CORPS 

Folder Title = MISC NBC MESSAGES                                                                               

Document Number =         48

Box ID = BX000093










          04 1916207 AUG 90 PP RR UUUU




                   CARC                l.B HOURS      .5 HOURS      .5 HOURS

          VX AT 1 GM/M2:


                     SAND               82 HOURS      20 HOURS 13.7 HOURS


                    GRASS                33 HOURS      8 HOURS       8 HOURS

                     CARC                 4HOURS       1 HOURS       1 HOURS


          B. DECREASES    IN PERSISTENCY   AT HIGHER TEMPERATURES    IS NOT

      LINEAR. INCREASING TEMPERATURES      ABOVE 100 DEGREES FAHRENHEIT


      WILL DECREASE PERSISTENCY ONLY SLIGHTLY.

          C.   CORRECTION FACTORS:


               SAND:       2.SX FROM GRASS TO SAND

               CARC:       1/8X FROM GRASS TO SAND

               THICKENER:   6X FOR THICKENED HD OR    GD (THD OR TGD)


      3. STUDY CONCLUSIONS (POC IS CPT SCHYELE,       DSN 969-5225).
          A. CHEMICAL AGENT RESISTANT COATING -ECARC@ - PAINTED COMBAT

      VEHICLES WILL "WEATHER'T QUICKLY AT 100 PLUS DEGREES FAHRENHEIT

      DAYTIME TEMPERATURES, EXCEPT FOR NONPAINTED SURFACES SUCH AS

      TARPS, TIRES, ETC.

          B. THICKENERS ADDED TO CU AGENTS WILL SIGNIFICANTLY

      INCREASE THE TIME AGENTS REMAIN A THREAT ON THE BATTLEFIELD.