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CORRAL HOLLOW
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32727
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2900 - Site Mitigation Program
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PR0543661
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COMPLIANCE INFO
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Last modified
6/11/2021 3:03:55 PM
Creation date
6/11/2021 2:22:14 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2900 - Site Mitigation Program
File Section
COMPLIANCE INFO
RECORD_ID
PR0543661
PE
2959
FACILITY_ID
FA0024810
FACILITY_NAME
GENERAL DYNAMICS - OTS
STREET_NUMBER
32727
STREET_NAME
CORRAL HOLLOW
STREET_TYPE
RD
City
TRACY
Zip
95377
CURRENT_STATUS
01
SITE_LOCATION
32727 CORRAL HOLLOW RD
P_LOCATION
03
QC Status
Approved
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EHD - Public
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CHOW ENGINEERING, INC. <br />Rev. 6, 8-8-14 <br />conditions encountered in the field and analytical results. Work tasks are described <br />below. <br />2.1 Field Activities <br />All work will be accomplished in a controlled, safe and professional manner in <br />accordance with the project specifications and work scope and accepted industry <br />practices. <br />One monitoring well will be drilled to an estimated depth of 60 - 70' bgs. A two-inch <br />diameter Schedule 40 polyvinyl chloride (PVC) plastic, with sufficient screen (0.010- <br />inch slot) to span the groundwater-bearing zone will be installed in the boring. A <br />filter pack (sand) will be installed from the total depth of the boring to 2-ft above the <br />top of the well screen. Approx. 2.5 feet of hydrated bentonite pellets will be installed <br />above the filter pack. The well will then be grouted using a concrete slurry to local <br />grade level. Following the grouting of the well a metal Christie box, will be installed <br />at the well head. A lockable water tight cap will be secured to the top of the 2" PVC <br />well casing. <br />The minimum of 72 hours will elapse between MW installation and MW <br />development. An oil/water interface probe will be used to determine the depth to <br />water and the depth to the bottom of the well casing. Monitoring wells will be <br />developed using a rod and surge block assembly. <br />A minimum of 24 hours will elapse between MW development and sample <br />collection. If possible, five (5) casing volumes of groundwater will be extracted <br />(purged) from the MW prior to the collection of groundwater samples for analysis to <br />maximize the possibility of collecting a water sample representative of the formation <br />water. Groundwater samples will be collected using a Watera positive displacement <br />pump attached to new, dedicated 1/2" high density polyethylene tubing inserted into <br />the well casing for purging and sample collection. <br />Each sample will be labeled and placed in a cooled ice chest for transportation to a <br />state certified laboratory for analysis of TPHd, TPHmo, and ORP. <br />The soil cuttings and equipment decontamination liquids generated during the <br />drilling of the borings will be properly contained pending disposal of these materials <br />by the client. <br />3.0 Responsibilities <br />It is the responsibility of Reuben Chow, CE's Principal, to implement this Site Health <br />and Safety Plan. Regular observations of work operations and enforcement of the <br />safety policy and procedures shall be conducted by Mr. Chow, who may act as the Site <br />2
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