As the major sub-consultant to Dames & Moore, Dean Ryan was recently awarded a contract to provide a variety of environmental engineering and compliance services for the Alameda Corridor project (a rail transportation project). The on-call environmental and engineering services will include but not be limited to Phase I environmental site assessments, Phase II environmental site investigations, remedial investigation/feasibility studies, remediation action plans, remediation action design, and remediation oversight for railroad and highway rights-of-way properties. The presence of hazardous substances within and adjacent to existing and proposed right-of-ways for the project is highly probable, therefore, it is necessary to identify hazardous and potentially hazardous substance related problems. Services are being provided to avoid or at least minimize costs and schedule delays of construction of the project by performing early assessment of known or potentially contaminated sites and/or cost effective remediation. The first task order issued to the Dames & Moore/Dean Ryan Team involves 30 Phase I, 10 Phase II and 10 Phase III investigations.
Dean Ryan is responsible for conducting geophysical surveys for utility and substructure clearance and locating the pipelines shown within easements, as well as collecting soil gas samples for analysis, in accordance with California Regional Water Quality Control Board's Well Investigation Program protocols. Soil samples were collected for analysis of volatile organic compounds (VOC's) by EPA Method 8260, for Title 22 metals by EPA Method series 6010/7000 for total recoverable petroleum hydrocarbons (TRPH) by EPA Method 418.1 for polychlorinated biphenyls by EPA Method 8080.
Dean Ryan staff also summarized the results of the first task order investigation in a draft and final report. The report summarizes site background information, Phase II site investigation objectives, the scope of investigations and investigative approach, field and analytical data obtained, assessment of the nature extent and concentrations of chemical compounds detected and estimate of the volume of impacted soil. It also shows the most feasible alternatives to remediate the site and will present an order-of-magnitude or range of estimated soil removal and disposal costs for impacted soils.