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Extensive CERCLA and RCRA Experience

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Extensive Experience in Japan and Asia

Contaminated Site Management

Tri-S Environmental is a premier environmental management firm.

Based in Southern California. Projects worldwide.

Recent Developments: High Profile Site and Los Angeles Regional Water Quality Control Board, California

PROPOSED TORRANCE DEL AMO PROJECT, ROSE EQUITIES, 2325 CRENSHAW BLVD, TORRANCE, CALIFORNIA

Petroleum hydrocarbon impacts were found in soil beginning at approximately 2 feet extending to 18 feet below the surface.

**1. JULY 22, 2024: NOTICE OF INTENT FOR REGULATORY OVERSIGHT-SITE ASSESSMENT REQUIREMENTS SET FORTH**

Rose Equities Received Notice Sent By Region 4. Dr. Odencrantz was directly involved with the preparation of the Notice Letter (notification, documents and numerous hours of staff briefings on i. June 27, 2024, ii. July 2, 2024, and iii. July 8, 2024)

Water Board» SITE ASSESSMENT REQUIREMENTS: Soil and soil vapor sampling in a grid pattern to determine if the subsurface is impacted and the extent of the impacted subsurface at the Site. Screen groundwater using discrete/grab sampling methods (e.g. hydropunch) to determine if groundwater is impacted beneath the Site.)

NOTICE AND SITE ASSESSMENT REQUIREMENTS LINK

**2. SEPTEMBER 10, 2025: OPEN – SITE ASSESSMENT**

Water Board» SITE CLEANUP PROGRAM, CASE NUMBER 1660: Designated Groundwater Beneficial Uses: i. Municipal and Domestic Supply, ii. Agricultural Supply, iii. Industrial Services Supply and iv. Industrial Process Supply

**3. NOVEMBER 1, 2025: 467 DAYS (ONE YEAR AND THREE MONTHS+) AFTER SITE ASSESSMENT REQUIREMENTS SET FORTH BY THE STATE OF CALIFORNIA**

Water Board» REQUIRED SITE ASSESSMENT/RESULTS: Work plan in progress/None

Places, Projects & Events

Groundwater contamination sites and groundwater water supply systems are complex and the manner in which they are managed are dependent on constantly changing technologies, regulations, unexpected per- and polyfluoroalkyl substances (PFAS) compounds, and water...

Keynote Address in Sri Lanka

Dr. Odencrantz was honored as the invited Keynote Speaker for the 3rd International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development. The subject of vapor phase transport of petroleum hydrocarbons and chlorinated...

Water Utility Evaluation

Tri-S Environmental performed a water utility segment evaluation for solar power augmentation for a start-up high gain solar company located in Silicon Valley, California. High gain solar combines high efficiency silicon cells and tracking that increases...

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Project Related

OSWER Technical Guide for Assessing and Mitigating the Vapor Intrusion Pathway From Subsurface Vapor Sources to Indoor Air

U.S. Environmental Protection Agency, Office of Solid Waste and Emergency Response Office of Solid Waste and Emergency Response Dr. Odencrantz is cited as authority on page 92 in the Final USEPA Guidance Document on Vapor Intrusion Sources to Indoor Air. Notable...

NH Supreme Court takes up Exxon appeal

By JEREMY BLACKMAN Monitor staff It was the largest such verdict in New Hampshire history, and Exxon, perhaps predictably, has been contesting it ever since. The battle appears to be finally nearing a head. Last week, Exxon’s attorneys asked the state Supreme Court to...

MTBE: The Gas Additive that is Hard to Remove

By Jason Reimers I barely remember leaded gasoline. All I really remember is being in the backseat of my mother’s Pinto and the question being posed: “Leaded or unleaded?” Lead is harmful to humans, so the federal Clean Air Act required that lead be phased out of...