I just checked some reference, according to this site:
http://specmap.sequence-omega.net/
Sprint's market ownership in San Francisco Bay market for SMR is 818-824MHz, 863-869MHz. That's only a 6x6MHz block of spectrum.
The system San Francisco is using is a Motorola Type II SmartZone, Analog and APCO-25 Common Air Interface running on 851-857MHz.
Looks like it doesn't overlap Sprint's license, but only gives them the ability to deploy a 3x3MHz LTE config in addition to a 1x800MHz channel.