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Geosyntec Consultants
<br /> Table 1:Historical Investigation Activities
<br /> Rough and Ready Island,Site 47
<br /> Port of Stockton
<br /> Investigation Report Media/Source Number of Samples Analyses Performed
<br /> Technical Memorandum for Thirty-Two Soil,0-1 feet bgs 26 samples from 26 locations VOCs,SVOCs,pesticides,PCBs,and
<br /> Aerial Photograph Sites(TtEMI,1997) metals
<br /> Grab groundwater,9-17 feet bgs 12 samples from 12 borings VOCs
<br /> Surface water(drainage ditch) 3 quarters at 1 location VOCs,SVOCs,pesticides,PCBs,TPH,
<br /> Surface Water and Sediment Site 4 quarters at 1 location dissolved metals,and general chemistry
<br /> Investigation(PRC,1997a)
<br /> Sediment(drainage ditch) 2 quarters at 2 locations VOCs,SVOCs,pesticides,PCBs,TPH,
<br /> total metals,and general chemistry
<br /> Technical Memorandum Background Soil
<br /> Concentration for Metals and Pesticides Background soil across RRI 58 samples from 201ocations Metals
<br /> (PRC,1997b') across RRI
<br /> Site 3 Remedial Investigation Report VOCs,SVOCs,pesticides,PCBs,and
<br /> z Channel bank soil,0-3 feet bgs 16 samples from 161ocations
<br /> (TtEMI,1998) metals
<br /> Final Letter Report Regarding
<br /> Confirmation Sampling in Unlined Native soil below drainage channel
<br /> Drainage Channel System Wet Reaches sediments,top 0.5 to 0.8 feet 4 samples from 4 locations pesticides,PCBs,and metals
<br /> (TtEMI,2001 a)
<br /> SVOCS,pesticides,PCBs,TPH,VOCs,
<br /> Soil,0-3 feet bgs 24 samples at 24 locations and metals
<br /> Field screening/sifting for lead pellets
<br /> Soil,0-9 feet bgs 20 samples from 6 locations SVOCs,pesticides,PCBs,TPH,and
<br /> metals WET
<br /> Remedial Investigation Report 4 samples from 1 cone
<br /> Operable Unit 1(TtEMI,2001b) Soil,7.75-21.75 feet bgs penetrometer test(CPT)boring General chemistry
<br /> Soil,0.5,1.5,and 2.5 feet bgs 90 samples from 30 locations Total arsenic
<br /> Groundwater monitoring wells 4 samples each from 2 wells VOCs,metals
<br /> Groundwater monitoring wells 4 samples each from 3 wells Metals,pesticides,PCBs,SVOCs,TPH,
<br /> and VOCs
<br /> Sediment(drainage channel) 4 samples from 4 locations Pesticides and PCBs
<br /> Groundwater monitoring wells 5 wells x 3 quarters Dissolved arsenic
<br /> Arsenic using hand-held XRF meter,
<br /> Soil,surface(-0.25 feet bgs) including 9%laboratory confirmation
<br /> Draft Site 47 Remedial Investigation analyses
<br /> (ERS,2009) 310 samples from 187 locations Arsenic using deionized water in the
<br /> Soil,1-20 feet bgs WET and total organic carbon(subset
<br /> of 1 sample from 7 locations
<br /> Grab groundwater,8-36 feet bgs 38 samples from 10 locations Dissolved arsenic
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