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ARCHIVED REPORTS XR0012294
EnvironmentalHealth
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2900 - Site Mitigation Program
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PR0502410
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ARCHIVED REPORTS XR0012294
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Entry Properties
Last modified
11/19/2024 10:19:09 AM
Creation date
9/4/2019 9:38:06 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2900 - Site Mitigation Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0012294
RECORD_ID
PR0502410
PE
2960
FACILITY_ID
FA0005437
FACILITY_NAME
UNOCAL BULK PLANT #0788
STREET_NUMBER
8203
Direction
W
STREET_NAME
ELEVENTH
STREET_TYPE
ST
City
TRACY
Zip
95376
APN
25014003
CURRENT_STATUS
01
SITE_LOCATION
8203 W ELEVENTH ST
P_LOCATION
99
P_DISTRICT
005
QC Status
Approved
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EHD - Public
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i <br /> r p <br /> 4 <br /> i concertation occurring in-U-C. Hydrocarbon concentrations generally <br /> attenuate to none-detected at depthsgr eater than 15 feet. <br /> j o PACIFIC has couducted three groundwater sampling events since the <br /> installation of Monitoring Wells U-1 thi ougb.U-3..Groundwater <br /> r� elevations at the site have risen approximately 1-1/2 feet since the first <br /> LIP sampling event in November 1990. Static groundwater occurred at <br /> depths of approximately 8 feet to 9 feet below grade during the <br /> May 23, 1991,sampling event,with a northerly flow direction ata <br /> gradient of 0.006. <br /> °•t'' +7 Y1a <br /> o Certified laboratory analysis of groundwater samples collected on <br /> �-� May 23, 1991,indicates maximum concentrations of 3,200 parts per <br /> € billion(ppb)TPH-gasoline in Well U-5,280 ppb TPH-diesel.in U-6, •3'"' <br /> and 55 ppb benzene in U-1. <br /> o To further define the extent of petroleum hydrocarbons in the soil and <br /> i" groundwater underlying the site,PACIFIC recommends tha <br /> e J instaliatioa of two additional groundwater monitoring wells located v' <br /> off-site. ", <br /> I L♦ .t <br /> 60 <br /> x <br /> r raP t <br /> I 6 . <br /> 1 r <br /> 3100101/REPOR•-_ . September 30, 1901 <br /> 1 <br />
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