New test results are back

According to the new test results I have made some good changes compared to the last test.. but I'm still having some problems with my baby grass 5 weeks old KBG.. See post ( 5 week old KBG ,) I got the ph up from 5.26 to now 6.4 I also got my calcium up.. On my reno I had tilled in 2 to 3 inch's of humus soil into my very hard clay soil. ( that was a nightmare ) I'm at the point where I'm thinking if I fix my soil.. my soil will fix my lawn.. one of the problems I could not fix and just bring it down slightly was the amount of sodium in my lawn.. As you can see its crazy high.. According to some of the local growers we have a lot of sodium in our soil over here.. I'm very close to the deltas..( 1 mile ) Bay Area 60 miles.. my question is what do you think about using some gypsum on the soil??.. it should help bring the calcium up and it should help get rid of some of the sodium. at this point there's no way to work it in however we are going to get some havey rain for the first time in 6 months. I'm thinking of just laying down a very light app and suggestions?? Will hurt my baby grass??