Larkspur Landing


Ross Valley Sanitary District (RVSD) began clean up its 10.3-acre former wastewater treatment plant site at 2000 Larkspur Landing Circle in the summer and fall of 2019. Two-thirds of the overall project will be complete by the end of the dry season. All of the hazardous material has been removed from the site. We plan to complete the remaining one-third of the project by summer 2020. When complete, the site will be cleaned to the cleanest levels that enable unrestricted use of the property.

The property contains trace concentrations of polychlorinated biphenyls (PCBs) which was present in some of the paint that was applied to the concrete administration buildings. The concrete of the former plant was crushed and used as backfill back in 1999. 

In March 2019, US EPA approved the remedial action plan to safely remove and dispose of this material, and in May 2019, RVSD selected a contractor to conduct the cleanup work.

To clean up the site, approximately 64,000 tons of soil and demolition debris will be removed from Larkspur Landing and sent to a municipal landfill and about 2,600 tons will be sent to a hazardous waste landfill. The site will be restored to existing grade with clean fill imported from a quarry at a total budget of about $9.6 million. There is no future development proposed for the site at this time. 

RVSD will work closely with the City of Larkspur and the local community in a public engagement process regarding the disposition of the property after cleanup is complete.

Click here to see the Larkspur Landing Frequently Asked Questions (FAQs).

Click here to see the Larkspur Landing Project Information Sheet.

Site Cleanup Schedule

  • The Contractor (ERRG) has mobilized workers and began grading the site the week of July 15.
  • Work is anticipated to be complete in December, 2019.
  • Regular work hours will be Monday – Friday, from 7:00 a.m. – 3:30 p.m., and Saturdays, from 8:00 a.m. - 4:00 p.m.*
  • Approximately 40 truckloads per day will be used to haul soil to and from the site.
  • Work will be conducted under strict EPA requirements for dust control and public health protection.
  • When complete, the project will eliminate residual risk to human health and the environment, with cleanup to meet unrestricted land use standards per strict federal testing and oversight.

*As approved by the City of Larkspur.

Larkspur Landing Documents

Click on the individual links below.

Cleanup Project


Larkspur Landing 170920-153