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ARCHIVED REPORTS_2012
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PR0440006
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ARCHIVED REPORTS_2012
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Last modified
7/18/2020 7:45:14 AM
Creation date
7/3/2020 11:07:35 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
4400 - Solid Waste Program
File Section
ARCHIVED REPORTS
FileName_PostFix
2012
RECORD_ID
PR0440006
PE
4434
FACILITY_ID
FA0004515
FACILITY_NAME
FRENCH CAMP LANDFILL
STREET_NUMBER
0
STREET_NAME
MANTHEY
STREET_TYPE
RD
City
STOCKTON
Zip
95231
APN
16307035
CURRENT_STATUS
02
SITE_LOCATION
MANTHEY RD
P_LOCATION
01
P_DISTRICT
001
QC Status
Approved
Scanner
SJGOV\rtan
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FilePath
\MIGRATIONS\SW\SW_4434_PR0440006_0 MANTHEY_2012.tif
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EHD - Public
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Water quality conditions for surface-water at the French Camp Landfill during the 2011 <br /> monitoring year are generally similar to those observed in the previous monitoring years. <br /> A comparison of upgradient(SW-1 and SW-2)to downgradient(SW-3) surface-water <br /> samples indicates generally similar inorganic constituent concentrations in the upgradient <br /> and downgradient surface-water stations, suggesting that the landfill is not impacting <br /> surface water quality. During the 2011 monitoring year, statistically significant <br /> increasing trends for turbidity were calculated for all three surface-water stations; and for <br /> carbonate alkalinity at surface water stations SW-1 and SW-3. However, increasing <br /> trends were calculated for both upgradient and downgradient surface-water stations <br /> suggesting that these increasing trends are reflective of regional conditions and not <br /> facility related. <br /> No VOCs were detected in any of the surface water samples collected during the 2011 <br /> monitoring year. <br /> 6.4 SOIL-PORE GAS <br /> Pursuant to M&RP Order No. R5-2007-0046, soil-pore gas probes are monitored <br /> semiannually using a field screening protocol. During the 2011 monitoring year, no <br /> methane was detected in any of the soil-pore gas probes. <br /> 6.5 COMPLIANCE RECORD <br /> During the 2011 monitoring year,no NOVs were issued by the LEA or Cal Recyle and <br /> the site is currently in compliance. <br /> 7.0 SUMMARY <br /> During the monitoring period, groundwater quality conditions beneath the French Camp <br /> Landfill are generally similar to those observed in previous monitoring periods. One CL <br /> was exceeded for chloride in the sample collected from well MW-9B during the <br /> monitoring period, though the current chloride concentration was near its historical <br /> minimum value. Statistically significant increasing trends were calculated for potassium <br /> and sulfate in well MW-9B, and for chloride in well MW-I OA. One or more statistically <br /> significant decreasing trends were calculated for inorganic constituent concentrations in <br /> all of the groundwater monitoring wells at the French Camp Landfill. For organic <br /> constituents, a decreasing trend was also calculated for TCFM in well MW-9A. <br /> During the monitoring period, chloroform and TCFM were measured above the PQL in <br /> the samples collected from wells MW-6A and MW-9A, respectively, and a notification <br /> letter was sent to the RWQCB of these VOC detections on December 1, 2011. <br /> Confirmation sampling was not performed for background well MW-6A since similar <br /> concentrations of chloroform have already been confirmed and based on the lack of <br /> chloroform at the point of compliance, it is believed that the chloroform concentrations <br /> measured in well MW-6A are not the result of a release from the landfill. A retest sample <br /> C:\2011-005 ITC—PSA I Ldoc 7 Geo-Logic Associates <br />
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