INTEGER,      INTENT(IN   ) :: id

    REAL,      INTENT(IN   ) :: dtstepc 

    TYPE(grid_config_rec_type),  INTENT(IN   )    :: config_flags


    REAL, DIMENSION( ims:ime, kms:kme, jms:jme, num_chem ),            &
	        INTENT(INOUT ) ::                               chem 


    REAL, DIMENSION( ims:ime, kms:kme, jms:jme, num_moist ),            &
	        INTENT(IN ) ::                               moist 

    REAL, DIMENSION( ims:ime, kms:kme, jms:jme, num_aero_srf_area ), &
	        INTENT(INOUT) ::                             aero_srf_area 

     REAL,  DIMENSION( ims:ime , kms:kme , jms:jme ),              &
             INTENT(IN   ) ::                                      &          
                                                         p_phy,    &
                                                         t_phy,    &  
                                                         rho_phy        


! needed for aerosols

    INTEGER, INTENT ( IN ) :: ldrog
  
    REAL,      INTENT(INOUT) ::                                     &
                      vdrog3(ims:ime,kms:kme-0,jms:jme,ldrog)

! RAR: needed for MADE_SOA_VBS option
    INTEGER, INTENT ( IN ) :: ldrog_vbs
  
    REAL,      INTENT(INOUT) ::                                     &
                      vdrog3_vbs(ims:ime,kms:kme-0,jms:jme,ldrog_vbs)