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ARCHIVED REPORTS_XR0008724
Environmental Health - Public
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2900 - Site Mitigation Program
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PR0537118
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ARCHIVED REPORTS_XR0008724
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Last modified
7/7/2020 9:53:11 AM
Creation date
7/7/2020 9:36:27 AM
Metadata
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Template:
EHD - Public
ProgramCode
2900 - Site Mitigation Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0008724
RECORD_ID
PR0537118
PE
2957
FACILITY_ID
FA0021303
FACILITY_NAME
WATERLOO FOOD & FUEL
STREET_NUMBER
3032
STREET_NAME
WATERLOO
STREET_TYPE
RD
City
STOCKTON
Zip
95205
CURRENT_STATUS
01
SITE_LOCATION
3032 WATERLOO RD
QC Status
Approved
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EHD - Public
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li V .1 1 <br /> 18 June 2004 <br /> AGE-NC Project No 99-0559 <br /> Page 4of8 <br /> 3 1 GROUND WATER ELEVATION AND GRADIENT <br /> The elevation of ground water in each monitoring well,during the monitoring event, was calculated <br /> by subtracting the depth to ground water from the surveyed casing elevation, current and historical <br /> ground water elevation results are provided in Table 1 Each ground water elevation is grouped <br /> according to the HU on the assumption that the elevation will reflect hydrostatic conditions within <br /> the sampled HUs Ground water elevation data from wells which exhibited residual free-petroleum <br /> product, was not for the ground water flow and gradient calculation <br /> HU1 and HU2 <br /> The depth to ground water from monitoring wells MW-1 through MW-4 and MW-5A through <br /> MW-8A ranged from 56 40 to 57 28 feet below casing grade, except well MW-2 <br /> Ground water elevation data collected from monitoring wells MW-1 through MW-4, and MW-5A <br /> through MW-8A ranged between 3137 feet (MW-8A) and 32 00 feet (MW-5A) below mean sea <br /> level (MSL) Ground water elevation increased approximately 5 5 feet, since the December 2003 <br /> monitoring event The top of the ground water table was within the screened intervals of the wells <br /> At the time of the March 2004 monitoring event,the potentiometric surface based on HU1 and HU2 <br /> wells inferred that a southwest flowing ground water flow direction from the site to the east at well <br /> MW-8 with hydraulic gradient of 0 00375 feet (Figure 3) <br /> HU3 and HU4 <br /> In the wells representing HU3 and HU4,the depth to ground water ranged from 56 57 to 57 30 feet <br /> below casing grade Ground water elevation data collected from monitoring wells MW-5B through <br /> MW-8B ranged between 3140 feet(MW-8B) and 3197 feet(MW-713)below MSL Ground water <br /> elevation from wells in this hydrologic units increased 5 5 feet since the last quarterly monitoring <br /> event <br /> Based on the monitoring wells screened in HU3 and HU4,ground water was inferred to be flowing <br /> primarily west toward the site from well MW-8 and southwest away from the former UST with a <br /> hydraulic gradient of 0 0005 ft/ft (Figure 4) <br /> Advanced GeoEnvtron mental,Inc <br />
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