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Leader in Soil and Groundwater Treatment Technologies

PFAS Investigation and Remediation

Vapor Intrusion and Air Emissions

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 (REGION 4), 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 (NOI)-SPECIFIED TESTING SET FORTH**

NOI Letter Sent Certified Mail to Rose Equities. Dr. Odencrantz was directly involved with the preparation of the NOI Letter (notification, documents and numerous hours of staff briefings on i. June 27, 2024, ii. July 2, 2024, and iii. July 8, 2024)

>TESTING: 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.)

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

>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. OCTOBER 21, 2025: 456 DAYS (ONE YEAR, 3 MONTHS) SINCE SPECIFIED TESTING SET FORTH**

>TESTING RESULTS: NONE

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