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ARCHIVED REPORTS_XR0004942
EnvironmentalHealth
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3500 - Local Oversight Program
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PR0545585
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ARCHIVED REPORTS_XR0004942
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Last modified
9/15/2020 11:14:15 PM
Creation date
3/19/2020 3:03:35 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0004942
RECORD_ID
PR0545585
PE
3528
FACILITY_ID
FA0000212
FACILITY_NAME
Mossdale Chevron
STREET_NUMBER
444
Direction
W
STREET_NAME
MOSSDALE
STREET_TYPE
RD
City
LATHROP
Zip
95330
CURRENT_STATUS
02
SITE_LOCATION
444 W MOSSDALE RD
P_LOCATION
99
P_DISTRICT
005
QC Status
Approved
Scanner
SJGOV\sballwahn
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EHD - Public
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' 08 November 2005 <br /> . AGE-NC-99-0570 <br />' Page 3 of 4 <br />' monitoring event, the top of the ground water table occurred within the screened intervals of the <br /> wells <br />' Ground water was inferred to be flowing to the north-northwest under a significant hydraulic <br /> gradient of approximately 0 03 foot/foot (ft/ft) The ground water elevation contours are depicted <br /> on Figure 3 <br /> 1 <br /> 32 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> 1 , <br /> TPH-g was detected in samples MW-1 and MW-2 at concentrations of 1,300 micrograms per liter <br /> (µg/1) and 420 µg/1, respectively TPH-d was not detected in any of the samples analyzed <br />' BTEX compounds were detected in wells MW-1 and MW-2 at the following maximum <br /> concentrations in well MW-1 5 4 µg/1 benzene, 260 µg11 ethylbenzene, and 529 µg11 xylenes <br />' MTBE was detected in wells MW-1 and MW-3 at concentrations of 41 gg/l and 33 µg11, <br /> respectively <br /> No other target analytes were detected at or above laboratory reporting limits in any of the samples <br /> t analyzed Laboratory results of ground water samples are summarized in Table 2 The laboratory <br /> report(CTEL Project No CT214-0504278), quality assurance/quality control (QA/QC)report, and <br /> chain of custody form are included in Appendix C Documents confirming the upload of laboratory <br />' electronic deliverable format (EDF) files and depth to water measurements to GeoTracker are <br /> included in Appendix D <br />' 4.0. SUMMARY AND CONCLUSIONS <br />' Based on the results of the April 2005 monitoring event, AGE draws the following conclusions <br /> During the April 2005 ground water monitoring event, the relative ground water elevation <br />' ranged from 7 20 feet (MW-3) to 10 03 feet (MW-5) below MSL Ground water elevation <br /> increased approximately 1 8 feet relative to the January 2005 monitoring event <br />' Ground water was inferred to be flowing to the north-northwest under a significant hydraulic <br /> gradient of approximately 0 03 ft/ft This flow direction and gradient are similar to previous <br /> monitoring events <br />' TPH-g was detected in samples MW-1 and MW-2 at concentrations of 1,300µg11 and <br /> • 420 µg11, respectively, TPH-d was not detected in any of the samples analyzed BTEX <br /> compounds were detected in wells MW-1 and MW-2 at the following maximum <br /> Advanced GeoEnvironmental,Inc <br />
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