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00�01 <br /> ' GEOMATFHX <br /> REVISED WORK PLAN TO EVALUATE <br /> SUITABILITY OF ROBERTS ISLAND <br /> FOR DREDGE MATERIAL PLACEMENT <br /> ' FROM DOCKS A-K, WEST COMPLEX <br /> Port of Stockton <br /> Stockton, California <br /> ' 1.0 INTRODUCTION <br /> The Port of Stockton (Port) is planning maintenance dredging activities along approximately <br /> 6,800 feet of dock at the Port's West Complex along the Federal Deep Water Channel of the <br /> San Joaquin River. It is estimated that about 400,000 cubic yards of material will be removed <br /> using a cutter head and suction method. The material will be transported approximately <br /> 5,000 feet via a floating pipeline to an approved dredge placement site (DPS) on Roberts <br /> Island. The DPS has been previously used for placement of dredged material from channel <br /> maintenance activities at the Port of Stockton. The DPS comprises an approximately 40-acre <br /> tract that is currently fallow. <br /> Asart of the overall characterization of the dredged material, the Port will be collecting Vibra- <br /> P g g <br /> Core samples of the sediment at selected locations along the length of the dock area. The <br /> samples will be submitted to the laboratory for analysis of an extensive list of metals and <br /> organic compounds (see Section 2.1). Analytical results of these samples will be evaluated and <br /> as part of the overall assessment of the Roberts Islands DPS. <br /> ' 2.0 SCOPE OF SERVICES <br /> The scope of services for this work plan addresses the specific tasks that need to be <br /> ' accomplished in order to characterize the sediments that will be dredged and evaluate the <br /> suitability of the Roberts Island DPS for disposal of the dredged material. The services- <br /> described in the following sections will include evaluation of the Vibra-Core sediment sample <br /> analytical results, fieldwork necessary to collect soil samples from within the DPS, and <br /> ' collection of groundwater samples from beneath the DPS. A Site Health & Safety Plan <br /> (SH&SP) and a Sampling and Analysis Plan (SAP)have been be developed for the previous <br /> ' field activities conducted at the DPS. We anticipate that the SH&SP will be adequate for the <br /> upcoming work. Geomatrix Consultants, Inc. (Geomatrix), will provide input on soil and <br /> groundwater sampling to update the SAP if necessary. All field activities will be conducted <br /> ' using standard Geomatrix field protocols. Analytical services for soil and water chemical <br /> ' I:\PROJECn6000s\6988.000\6988-IO.doc 1 <br />