Based on evaluation of the newspaper ads, we think these gigs were on 7/27 and 7/28. NRPS tapes from "7/29" and "7/30" seem to come from these dates, as well as the "7/30" acoustic Dead fragment.
ad: Good Times v.3 n.29 (July 24, 1970), p. 16, billing "Mickey Hart and the Heartbeats, with Jerry Garcia"
listing: San Francisco Chronicle July 27, 1970, p. 37, billing "Mickey Hart and the Heartbeats, with Jerry Garcia"
listing: [contra] Berkeley Tribe v.3 no.3 (no 55) (July 24-31, 1970), p. 28, billing Mance Lipscomb
Set 1: Workin' Man Blues, Together Again, I Don't Know You, Only Daddy That'll Walk the Line, Superman, Henry, Rainbow, Me And My Uncle, Mama Tried, All I Ever Wanted, Louisiana Lady, Honky Tonk Women Set 2: Whatcha Gonna Do, Glendale Train, Lodi, If You Hear Me When I'm Leaving, Sweet Lovin' One, Portland Woman, Delilah, Dirty Business, Last Lonely Eagle, Hello Trouble, Big Yellow Taxi, The Weight
Partial Set 1: Hello Trouble, Glendale Train, Kaw-Liga, Sailin', Lodi Set 2: Superman, Down In The Boondocks, Cecilia, The Bottle Let Me Down, Runnin' Back To You, Connection, Lady Came From Baltimore, Live And Let Live, Garden Of Eden, The Race Is On, Cathy's Clown, El Paso, Mama Tried, Louisiana Lady, Me And Bobby McGee, Honky Tonk Women