TASSAJARA VALLEY -- A revised plan for a residential subdivision and a mix of other uses in the Tassajara Valley, currently under review by Contra Costa County, is subject to a new, July 11 deadline for public comment on the scope of an upcoming environmental review.

Developer FT Land LLC wants to build 152 single-family homes and other, mostly park and recreational, features and parking on part of a 771-acre site east of San Ramon and Danville that is outside of the Contra Costa County urban limit line. The residential subdivision, part of a project dubbed Tassajara Parks, would be on 30 acres of the northern 155 acres of the site, along with parkland, a trail, staging areas, a detention basin, a portion of a parking lot for Tassajara Hills Elementary School and improvements to the frontage of Camino Tassajara.

The proposed 30-acre residential component would require an adjustment to the urban limit line as part of a county general plan amendment.

The 616-acre southern part of the site, less than a half mile from the northern part, would include 5 acres to be used as a training facility by the San Ramon Valley Fire District. Another 5 acres would be slated for yet-unspecified uses by the San Ramon Valley Unified School District. The remaining 606 acres would be for park, recreation and open space uses.

The current project is the descendant of a 2010 plan, dubbed New Farm Project, which called for 43 homes on the north side and 142 on the south side, for a total of more than 180 residential units, along with olive orchards, a church, a cemetery and a fire-training facility. In 2013, the applicant submitted the current, revised plan.

According to a May 28 notice by the county Department of Conservation and Development, the applicant has contracted for water supply with the Central Valley Project. The projected delivery of the water will be evaluated as part of a water supply assessment. The water supply for the southern part of the site would come via a four-inch water mainline from the northern part.

Alternatively, the project would need to be annexed into the service area of a public water supply agency, subject to approval by the Local Agency Formation Commission.

The project would also have to be annexed into the Central Contra Costa Sanitary District for wastewater service.

A scoping meeting on possible environmental concerns was held June 16 at the county Department of Conservation and Development office in Martinez. There will be a second scoping session at 3:30 p.m. July 7. The office is at 30 Muir Road, Martinez.

The new deadline for public comments on environmental concerns related to the project, originally set for June 27, is 5 p.m. July 11. Comments should be directed to Contra Costa County Department of Conservation and Development, Community Development Division, Attn. John Oborne, 30 Muir Road, Martinez CA 94553.

For more information, contact Oborne at john.oborne@dcd.cccounty.us or 925-674-7793.

Contact Tom Lochner at 510-262-2760. Follow him at Twitter.com/tomlochner.