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Experience EXPERIENCETOXICITY & BIOACCUMULATION TESTING
Dredge Materials Evaluations
 

As part of new and on-going dredging maintenance programs, Pacific EcoRisk has managed or participated in numerous dredged sediment evaluation projects, including:

arrow preparation of Sampling and Analysis Plans (SAPs) and negotiation of SAPs with regulators,
arrow performance of field sampling,
arrow sample management, including preparation for physio/chemical and biological analyses,
arrow management of contract analytical labs,
arrow performance of toxicity testing (including solid-phase sediment tests with amphipods and polychaetes and suspended particulate phase (elutriate) tests with bivalve and echinoderm embryos),
arrow

performance of bioaccumulation testing (including 28-day sediment bioaccumulation tests with polychaetes and bivalves),

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preparation and presentation of Data Reports, and negotiation of resultant dredging requirements with regulators,

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preparation of Tier I exclusions, and negotiation of acceptance with regulators.

These sediment evaluations have been performed under the Inland Disposal Testing Manual, the Ocean Disposal Testing Manuals, and the Upland Disposal Testing Manual, as well as various Regional Implementation Manuals. Select projects for which our company has participated in are provided below:

 
     
     

Port of Oakland Maintenance Dredging Program, California
As part of the Port of Oakland’s on-going dredging maintenance program, Pacific EcoRisk is preparing Tier 1 exclusions, and performing project management of dredged materials evaluations, including preparation of Sampling and Analysis Plans (SAPs), performance of field sampling, sample processing and management of contract analytical labs, and performance of solid-phase sediment tests with amphipods and polychaetes, suspended particulate phase (elutriate) tests with bivalve embryos, and 28-day sediment bioaccumulation tests with polychaetes and bivalves.

 
     
     

US ACOE-permitted Biological Testing of Dredged Sediments
As part of the USACE ongoing dredging maintenance program for the Bodega Bay Harbor, Pacific EcoRisk performed biological testing of sediment samples, including solid-phase sediment tests with amphipods and polychaetes, suspended particulate phase (elutriate) tests with bivalve embryos, and 28-day sediment bioaccumulation tests with polychaetes and bivalves, following the ITM and OTM guidance manuals

 
     
     

US ACOE-permitted Biological Testing of Dredged Sediments
As part of an on-going dredging program for the U.S. Navy’s Pear Harbor Facility, Pacific EcoRisk is performing numerous solid-phase sediment test with amphipods, suspended particulate phase (elutriate) tests with bivalve embryos, and bioaccumulation tests with bivalves and polychaetes. This project includes extensive characterization of both sediment, sediment elutriate, and sediment porewater chemistry.

 
     
     

US ACOE-permitted Biological Testing of Dredged Sediments
As part of an on-going dredging program for the City & County of San Francisco, Pacific EcoRisk is performing numerous solid-phase sediment test with amphipods, suspended particulate phase (elutriate) tests with bivalve embryos, and bioaccumulation tests with bivalves and polychaetes. This project includes extensive characterization of both sediment, sediment elutriate, and sediment porewater chemistry.

 
   
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