Project Overview: Summit successfully executed the excavation, transportation, and disposal of Type Z-2 aerially deposited lead (ADL) material for the LACMTA Soundwall Package 10 project. This comprehensive project, managed by C.A. Rasmussen, Inc. (Rasmussen), was part of Highway and City Street Construction Activities in Los Angeles County.

Location: Various locations on Route 210 from 0.1 mile west of Marango Avenue overcrossing to 0.1 mile east of the Santa Anita Avenue undercrossing (Location A), and on Route 134 from 0.08 mile east of the Ledge Avenue undercrossing to 0.02 mile west of the Forman Avenue undercrossing (Location B) in Los Angeles County, California.

Scope of Work: The project encompassed precise planning and execution, focusing on the remediation of ADL-contaminated material. C.A. Rasmussen, Inc. performed the excavation, transportation, and disposal activities on Route 210 (Location A) from 0.1 mile west of Marango Avenue overcrossing to 0.1 mile east of the Santa Anita Avenue undercrossing, as well as on Route 134 (Location B) from 0.08 mile east of the Ledge Avenue undercrossing to 0.02 mile west of the Forman Avenue undercrossing.

Key Activities:

• Excavation of Type Z-2 ADL material
• Safe transportation of Hazardous material
• Disposal in accordance with regulatory requirements

Environmental Considerations: Given the nature of the project, environmental considerations were paramount. Summit implemented stringent measures to ensure compliance with environmental regulations, safeguarding both public health and the surrounding ecosystem.

Outcome: Summit successfully completed the ADL remediation project, contributing to the enhancement of soundwall infrastructure along Route 210 and Route 134 in Los Angeles County. The project stands as a testament to Summit’s commitment to excellence in environmental services and safe construction practices.

Summit provided environmental consulting and contracting services as part of the Interstate 5/Carmenita Road Interchange project. The construction included the removal of the existing two-lane over-crossing at Carmenita Road, realignment of existing frontage roads, and construction of a tight diamond interchange with a new Carmenita Road over Interstate 5 and the Union Pacific Railroad crossing.

Services included preparation of a health and safety plan, excavation and transportation plan, lead compliance plan, sampling, and analysis plan, and transportation and disposal plan outlining the requirements for the handling of contaminated material. Fieldwork included geotechnical drilling of seventy (70) soil borings to approximately sixty (60) feet below ground surface to determine the location and thickness of the impermeable layer above the Artesia Aquifer, collection and testing for 7500 soil samples from over twenty (20) excavations and 250  soil stockpiles. Along with the transportation and disposal for 60,000 tons of contaminated soil.

 

This project involves the excavation, loading, transportation, and disposal of 2,670 tons of Type Z-2 impacted hazardous material.

Services included preparation of a health and safety plan, excavation and transportation plan, lead compliance plan, sampling, and analysis plan for potential environmental impacts due to ADL from motor vehicle exhaust in the surface and near-surface soils on the roadway within the project boundaries, and transportation and disposal plan outlining the requirements for the handling of contaminated material. The Type Z-2 contaminated material was removed from the Right-of-Way shoulder areas along northbound State Route 33 from Post Mile 69.3 to 70.9 in Firebaugh, Fresno County, California, by directly loaded it into end-dump trucks and transported for disposal at a Class I disposal site.

Other fieldwork included sampling and testing for contaminates and air sampling and worker training for lead.

 

Summit Environmental Contractors provided environmental contracting services for construction activities located along an approximate 3.5-mile segment for both the north and south bound Interstate 710. Health and safety training was also conducted to protect workers and the public from hazards. Field work included sampling, testing and air monitoring for 1146 Compliance. Due to the high level of Aerially Deposited Lead (ADL) 6,417 Tons of hazardous material was removed and disposed of at a Class I landfill. Summit prepared a Lead Compliance Plan (LCP) and an Excavation and Transportation Plan (ETP) for the proper operating procedures of handling and transporting lead.