4140, do you own a decently sized, 32"+. FSTV? If so, set the sound on MTV or similar to 85dBC at the viewing position. You should observe two things..
1) The TV will likely struggle to deliver clean sound at 85dB, might not even get there.
2) Flipping back to a 'soap' channel, you and the rest of the folks with you will find that level uncomfortably loud.
This all assumes the room is reasonably quiet.
AFAIK 85C was chosen as a reference because is it a sound level where human hearing is fairly 'flat' (G'ge 'Equal Loudness Curves') and also perhaps is a level which gives virtually no hearing damage as an AVERAGE over an 8hr period*. There also the fact that it seems logical to have other people in the production chain working at the same level YOU did when you sent your files off for mastering.
So, what to do? If you already have the system calibrated to 85C, mark that in some way. Now reduce the level to one you are comfortable with (and possibly the rest of the house!) and measure and set that, it will probably sit at around 70-75dBC and it is perhaps NO coincidence that that is the average level of speech at conversational distances (mics USED to be specc'ed at 75dBSPL but I guess 1Pa/V makes the adpuff peeps feel better!). Do your work at the reduced level but check from t2t that it sounds ok at 85.
*This does NOT mean you should ever work an 8 hr stretch! Ears fatigue fairly quickly and especially if checking at the higher level, rest them for an hour or two at least every two hours or sooner if you detect problems such as ringing or a loss of sensitivity when things go 'quiet'.
This post has just reminded me that I was going to look into some means of measuring the SPLs delivered by headphones that is practical for the HR bod. Will have a go..Promise!
(4140, are you anything to do with the metal or gun industry?)
Dave.