Most property management companies and home owners use http://www.craigslist.com for finding tenants. I also use http://www.hotpads.com and about 5 other sites as well. You can check craigslist for both Pleasanton & San Ramon.
Brian Ripp, CRS, GRI
Broker, Notary, Property Management
Real Estate Market Weekly Update Webcast: http://realtytimes.com/REUv/BrianRipp
Realtor since 1985