Great, it looks like this works! I ran TestGEOSChemToInMAP_new -regen_golden_files, and the new output has correct looking values for both ParticleWetDep and OtherGasWetDep.
Coverage increased (+0.002%) to 67.327% when pulling edcb91a13e9a54f111bdf3b99305217e6d75b03e on gc-wetdep into 8edd9cddbf0fa012ea6c3528e2eaadfba59f4ecb on master.
Please take a look.