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520 John Muir Drive - Former site of the Pacific Rod and Gun Club

Pacific Rod and Gun Club Evaluation and Remediation

Location and History

While located at 520 John Muir Drive on the southwest side of Lake Merced, the Pacific Rod and Gun Club (PRGC) once occupied about 10-acres of land under lease from the City of San Francisco (City).Beginning in 1935 they offered recreational skeet and trap shooting for members and the public. Historical use of lead shot and clay targets containing poly aromatic hydrocarbons (PAHs) resulted in elevated levels of lead, arsenic and PAHs contamination in soils onsite. Numerous investigations were conducted at the site to characterize the contaminants in soils and sediments along the shoreline and surface water in Lake Merced located adjacent to the site. Results of these investigations indicated that historical use of lead shot and clay pigeons containing PAHs impacted soils and sediment along this section of shoreline.

The PRGC lease expired on April 8th 2015. The site is currently undergoing construction/remediation to address contaminated soils resulting from PRGC historical activities.

Lake M 2016

Site conditions Winter 2016

Regulatory Oversight
520 John Muir Drive is under the oversight of the San Francisco Regional Water Quality Control Board (RWQCB). In June 2013, the RWQCB issued Cleanup Order No. R2-2013-0023 requiring the remediation/cleanup of upland soils and additional investigation of in-lake sediments.

Site Remediation

Site remediation ultimately included excavation and appropriate offsite disposal of approximately 58,600 cubic yards of contaminated soils and backfilling of excavated areas with clean fill material. Following completion of all earthwork, the site will be re-vegetated with appropriate native grasses to prevent erosion.

Construction/remediation commenced in May 2015 and is expected to be completed in March 2016

As of January 2016, cleanup work at this site is approximately 90% complete. Due to the discovery of additional buried contaminated soils, clay pigeon debris etc, onsite and in excess of previously anticipated amounts, excavations in some portions of the site have extended up to 11.5 feet below the surface. A community meeting was held on Oct. 21, 2015.  to provide an update on the project. A look-ahead to the future at this site was presented by the SFPUC and SF Recreation and Parks (SFRPD). SFRPD has released a Request for Proposals for future use of this site.

Lake M 2016
  Site cleanup underway
Lake M 2016
  Site conditions following excavation and backfill
Lake M 2016
  Installation of erosion control materials
Lake M 2016
  Erosion control installation complete


Reports, Documents and Permits

  • PRGC Summary and FAQ
  • Site Investigation and Human Health Risk Assessment
  • RWQCB Final Cleanup Order for the Pacific Rod and Gun Club 
  • Remedial Action Plan and Human Health Cleanup Goals
  • Final Mitigated Negative Declaration
  • Mitigation Monitoring and Reporting Program
  • Coastal Commission Permit
  • Streambed Alteration Permit




  • Last updated: 3/14/2016 10:36:23 AM