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2900 - Site Mitigation Program
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PR0182171
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FIELD DOCUMENTS
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Last modified
5/19/2020 1:51:33 PM
Creation date
5/19/2020 1:44:45 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2900 - Site Mitigation Program
File Section
FIELD DOCUMENTS
RECORD_ID
PR0182171
PE
2954
FACILITY_ID
FA0004080
FACILITY_NAME
NAVCOMSTA
STREET_NUMBER
305
Direction
W
STREET_NAME
FYFFE
STREET_TYPE
ST
City
STOCKTON
Zip
952035000
CURRENT_STATUS
01
SITE_LOCATION
305 W FYFFE ST
P_LOCATION
01
P_DISTRICT
001
QC Status
Approved
Scanner
TSok
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EHD - Public
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a <br /> only one soil sample and one groundwater sample from each Geoprobe <br /> location at each site will be collected and submitted for laboratory <br /> analysis. Soil samples will be collected from the unsaturated zone at an <br /> approximate depth of two to four feet. Groundwater samples will be <br /> collected at the soil/groundwater interface. <br /> Table 1 <br /> Proposed Geoprobe Sampling Scheme <br /> Site Proposed Proposed Proposed Approximate <br /> Number of Number of Number of Soil Sampling <br /> Geoprobe Soil Samples GW Depths (ft)* <br /> Locations Collected Samples <br /> Collected <br /> UST 517 15 12 15 2 to 4 <br /> UST 816D 12 10 12 2 to 4 <br /> Sump 617 8 6 8 2 to 4 <br /> Sum 816D 1 6 4 1 6 2 to 4 <br /> Note: If additional Geoprobe sampling is necessary to define the extent of <br /> contamination at a site, approval from the EFAWEST Engineer-in-Charge will be <br /> requested. <br /> *=Depending on field conditions,soil samples will be collected in the deepest portion <br /> of the vadose zone (capillary fringe) , with no more than five vertical feet <br /> separating the samples in one bore hole. In the event that the water table is less than <br /> approximately three feet below ground surface, no soil samples will be collected. <br /> It is anticipated that soil contamination will be somewhat limited since <br /> the primary movement of liquids in the unsaturated zone is <br /> downward. Defining groundwater contamination may require <br /> considerably more Geoprobe sampling due to the lateral movement of <br /> groundwater. In the case where soil contamination has been defined <br /> based on field screening but additional Geoprobe sampling is necessary <br /> only to define groundwater contamination, soil samples from the <br /> additional Geoprobe locations will not be submitted for laboratory <br /> analysis. <br /> Geoprobe Sampling <br /> A Geoprobe sampler will collect soil and groundwater samples for <br /> evaluation of subsurface conditions and laboratory analysis. The <br /> Geoprobe is a truck- or van-mounted system that collects soil and <br /> groundwater samples using a hydraulic press and hydraulic hammer to <br /> drive one- or two-inch-outer-diameter sample collection devices to the <br /> desired depths. Only one sample can be collected each time the sample <br /> 4-3 <br />
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