Peter Shimer, PG

Mr. Shimer is a California registered Professional Geologist with over ten years in environmental assessment, remediation, and risk management. He holds a BS in Engineering Geology from the University of California in Los Angeles, and an MS in Geology from California State University, Long Beach. In his current role as Principal Geologist for Roux (2026–present), he directs complex environmental site assessments and subsurface investigations that involve: targeted soil removals; implementation of active remedial strategies and vapor intrusion mitigation measures; underground storage tank closures; assistance with oil well reviews and construction of vent cones for development; and due-diligence/disposition assistance for industrial and developer clients across California.

Mr. Shimer’s practice focuses on Brownfields redevelopment with extensive knowledge of environmental regulatory oversight agencies such as the California Department of Toxic Substances Control (DTSC), the Regional Water Quality Control Boards, and local Certified Unified Program Agencies (CUPA). Peter is known for stewarding multi‑stakeholder projects to completion through clear communication with clients, attorneys, and regulators with a disciplined approach to identifying and minimizing risk.

Representative experience includes managing a multi‑phase remedial investigation at a former bulk fuel terminal with air‑sparge/soil vapor extraction (SVE) systems and confirmed light non-aqueous phase liquid (LNAPL), where he has led vadose‑zone and groundwater characterization to evaluate remedy performance and improvements. He has guided a 90‑acre former foundry/steel manufacturing facility through remedy selection (SVE and soil stabilization/capping) through remedy selection under DTSC oversight and coordinated environmental risk management during demolition, grading, and construction. He has managed investigations at a 14‑acre former drilling‑mud lagoon with nine on‑site oil wells, preparing findings and plans for DTSC, supporting remedial design, advising on development design to avoid well re‑abandonment, and engaging the California Geologic Energy Management Division (CalGEM) and the municipality on well abandonment requirements. Additional work includes PFAS investigations under Los Angeles Regional Water Quality Control Board (RWQCB)/California State Water Resources Control Board (SWRCB) orders; due diligence Phase II programs at former service stations and industrial properties; South Coast Air Quality Management District (SCAQMD) Rule 1166/1466 compliance for earthwork; and underground storage tank (UST) closures under county and city fire department oversight, together demonstrating breadth across contaminants, media, and remedial technologies.

• Remedial Investigation and Optimization, Former Bulk Fuel Terminal, Los Angeles County, California. Mr. Shimer oversees a multi‑phase remedial investigation at a former bulk fuel terminal impacted by total petroleum hydrocarbons (TPHs), volatile organic compounds (VOCs), and LNAPL under oversight of the Los Angeles Regional Water Quality Control Board. Work includes characterization of soil, soil vapor, groundwater, and LNAPL across a 100-foot vadose zone to assess the performance of existing air sparging and soil vapor extraction systems that had experienced diminishing efficiency. Additional responsibilities included identifying optimization strategies to improve remedial effectiveness, evaluating potential risks to receptors, and coordinating with the owner’s operations and redevelopment team to integrate remedial activities with long‑term site planning.
• Site Characterization and Remedial Design Investigation & Redevelopment Support, 90‑Acre Former Foundry and Steel Manufacturing Facility (DTSC Oversight), California. Mr. Shimer led a multi‑year remedial design investigation for a large industrial redevelopment site affected by chlorinated solvents in soil vapor and TPH, PCBs, and metals in shallow soils. Under the oversight of the California DTSC, he documented site conditions for regulatory concurrence, evaluated remedial technologies—including soil vapor extraction and soil stabilization/capping—and supported remedy selection through closure. He also coordinated closely with demolition, grading, and construction teams to ensure redevelopment activities were compatible with ongoing remedial obligations. His strategic planning and regulatory coordination helped the owner manage environmental liabilities while maintaining the project schedule and development objectives.
• Site Characterization and Remedial Design, 14-Acre Former Oilfield Drilling-Mud Disposal Site (DTSC Oversight), Southern California. In support of the commercial redevelopment of a 14‑acre former oilfield drilling‑mud disposal site containing nine on‑site wells under the California Land Reuse and Revitalization Act (CLRRA), Mr. Shimer managed subsurface investigations of cover soil, groundwater, and vapor intrusion conditions with DTSC oversight, including preparation of a Report of Findings and Remedial Design and Implementation Plan, and coordinated extensively with CalGEM to evaluate well abandonment conditions and regulatory triggers. His work included advising the owner on engineering design modifications to avoid reabandonment requirements and providing environmental oversight during grading to ensure safe and compliant construction. This project reflects his combined expertise in oil field legacy infrastructure, vapor intrusion mitigation, and complex redevelopment under multi‑agency oversight.