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ARCHIVED REPORTS_XR0004591
EnvironmentalHealth
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2900 - Site Mitigation Program
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PR0507835
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ARCHIVED REPORTS_XR0004591
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Last modified
3/5/2020 2:07:58 PM
Creation date
3/5/2020 11:54:58 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2900 - Site Mitigation Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0004591
RECORD_ID
PR0507835
PE
2950
FACILITY_ID
FA0007793
FACILITY_NAME
SUPER STOP MARKET
STREET_NUMBER
290
Direction
N
STREET_NAME
MAIN
STREET_TYPE
ST
City
MANTECA
Zip
95336
APN
22309101
CURRENT_STATUS
02
SITE_LOCATION
290 N MAIN ST
P_LOCATION
04
P_DISTRICT
003
QC Status
Approved
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EHD - Public
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Gealo icat TeCIIICS Inc. <br /> 1 101 7"Street <br /> Modesto,California 95354 <br /> (209)522-4119/Fax#522-4227 <br /> REPORT <br /> ' Additional Site Characterization <br /> Soil and Groundwater Investigation <br /> ' Cardoza <br /> Super Stop Market <br /> 290 N. Main St <br /> Manteca, CA <br /> ' Project No 662 2 <br /> February 20, 2004 <br /> EXECUTIVE SUMMARY <br /> ' This report summarizes the site er <br /> k wor <br /> investigation formed at the Su <br /> g P per Stop Market on <br /> May 30, 2002, and December I - 12, 2003 A continuously cored, single boring was <br /> ' installed on May 30, 2002 in accordance with San Joaquin County Environmental Health <br /> Department directives A discretely screened deep monitoring well, MW-104, was installed <br /> ' in the boring (see Figure 2) Laboratory analyses of groundwater samples from this well <br /> indicated that it contained the oxygenated fuel compound MTBE (2 8 — 66 ug/1) for all six <br /> sampling events completed to date This indicates that the contamination has migrated to <br /> ' the depth of the screened interval of this well 48 —53 feet below grade surface <br /> On December 1 — 4, 2003 Gregg Drilling & Testing Inc (Gregg) of Martinez, California <br /> ' mobilized to the site to perform cone penetrometer testing (CPT) The CPT testing began <br /> with a single deep boring CPT-4 to a depth of 80 feet bgs in the vicinity of existing deep <br /> well MW-104 The purpose of this boring was to determine the lithology lower than the <br /> ' terminal depth of the MW-104 boring (55 feet bgs) because the SJC/EHD stated that the <br /> vertical extent of the plume was undefined in that location After this borehole was <br /> completed, the rig was moved several feet and a new hole was advanced for the purpose of <br /> ' obtaining discrete water and soil samples Seven additional CPT borings were advanced in <br /> 1 a similar fashion Soil samples obtained from the boreholes reveal that the soil <br /> 1 <br />
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