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ARCHIVED REPORTS_XR0004868
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ARCHIVED REPORTS_XR0004868
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Last modified
3/9/2020 3:52:26 PM
Creation date
3/9/2020 1:40:00 PM
Metadata
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Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0004868
RECORD_ID
PR0545438
PE
3528
FACILITY_ID
FA0000848
FACILITY_NAME
QUIK STOP MARKET #2121
STREET_NUMBER
1196
Direction
W
STREET_NAME
LOUISE
STREET_TYPE
AVE
City
MANTECA
Zip
95336
APN
217-410-43
CURRENT_STATUS
02
SITE_LOCATION
1196 W LOUISE AVE
P_LOCATION
04
P_DISTRICT
003
QC Status
Approved
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EHD - Public
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Fourth Quarter 2005 Monitoring Report <br /> Quik Stop Market No 121 <br /> Page 3 <br /> All three of the deep wells, MW-6, MW-9 and MW-10, screened from 65 to 75 feet within <br /> the B-aquifer, were reported to be free of detectable TPHg/BTEX One of the three B-aquifer <br /> wells was reported to contain MTBE Monitoring well MW-6 was reported to contain 0 62 ug/L <br /> MTBE No other compounds were detected in MW-6 or wells MW-9 and MW-10 The results <br /> of the groundwater analysts are summarized in Table 2 A graph for well MW-3 and RW-1, <br /> summarizing MTBE concentrations over time, are also presented herein The analytical reports <br /> from STL, chain-of-custody documents and field notes are attached in Appendix B <br /> Discussion <br /> Groundwater measurements taken in seven of the ten shallow A-aquifer wells this quarter <br /> indicated the depth-to-groundwater ranged from approximately 19 93 to 22 20 feet below the top <br /> of the well casings The water level in monitoring well MW-4 was measured at 20 35 feet below <br /> the top of the well casing The water table in the A-aquifer has risen approximately 1 to 1 5 feet <br /> during the last three months The current groundwater table at the site generally shows a slight <br /> flow direction to the northeast with a slight depressed area around well MW-2 (Figure 4) <br /> Groundwater measurements taken in the three B-aquifer wells indicated the depth-to- <br /> groundwater ranged from approximately 2144 to 22 50 feet below the top of the well casings <br /> The water table in the B-aquifer has risen approximately 5 feet during the last three months A <br /> groundwater gradient map for the B-aquifer was created and indicates a gradient of 0 001 feet per <br /> foot to the northeast(Figure 5) <br /> Dissolved oxygen (D O ) readings were collected this quarter The D O readings for all of the <br /> wells are summarized in Table 3, and also show D O readings from previous sample rounds <br /> Based on the groundwater data obtained during the quarter, it continues to appears TPHg and <br /> BTEX compounds have been eliminated from all the site wells The MTBE plume has been <br /> eliminated from the area around monitoring well RW-1 The previous MTBE concentration <br /> reported in well RW-1 has dropped froml60,000 ug/L on August 16, 2002 to non-detect this <br /> quarter Minor concentration of MTBE was detected in one of the three B-aquifer wells this <br /> quarter Monitoring well MW-6 was reported to contain 0 62 ug/L MTBE No other fuel <br /> oxygenates were detected in the B-aquifer wells A summary of the data collected during the <br /> operation of the System is presented in Table 3 <br /> To summarize the results, with the exception of MW-6, no TPHg/BTEX or fuel oxygenates were <br /> detected in any of the wells sampled this quarter The KVA C-Sparge system remains shut down <br /> to determine if there will be any rebound effect at the site Based on the last two quarters <br /> of non-detect groundwater results, CCI anticipates conducting two more quarters of groundwater <br /> sampling before obtaining case closure The next quarterly sample round is scheduled for <br /> 'i January 2006 <br />
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