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ARCHIVED REPORTS_XR0004597
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2900 - Site Mitigation Program
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PR0507835
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ARCHIVED REPORTS_XR0004597
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Last modified
3/5/2020 12:44:59 PM
Creation date
3/5/2020 12:00:21 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2900 - Site Mitigation Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0004597
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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SJGOV\sballwahn
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EHD - Public
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t <br /> ed� iC <br /> 'Cil �T � d, TeC`LiLiCS lllC. <br /> L11017"Street <br /> Modesto,California 95354 <br /># (209)522-4119/Fax#522-4227 <br /> L <br /> REPORT <br /> Groundwater Monitoring <br /> L 1" Quarter 2005 <br /> Cardoza <br /> L <br /> Super Stop Market <br /> 290 N.Main St. <br /> Manteca, CA <br /> Project No. 662.2 <br /> I' March 24, 2005 <br /> rr <br /> EXECUTIVE SUMMARY <br /> This report summarizes the 1St Quarter 2005 groundwater monitoring event that took place on <br /> February 17, 2005. The laboratory analyses reveal that low to moderate concentrations of the <br /> t oxygenated fuel compound MTBE was detected in all of the seven wells sampled (three of <br /> these wells are newly installed). This is consistent with the historical data. Gasoline <br /> constituents TPH-G and BTEX were not detected in any of the groundwater samples. <br /> In accordance with San Joaquin County directives, the three new monitoring wells were also <br /> tested for diesel, methanol, ethanol, ETBE, DIPE, TAME, TBA, 1,2-DCA, EBD and lead. <br /> None of the wells contained these constituents above the laboratory reporting limits. } <br /> The average elevation of groundwater at the site was approximately 14,5 feet mean sea level, <br /> or approximately .24.5 feet below grade. Groundwater gradient calculations show that <br /> groundwater flow was N79°E with a slope of 0.001 ft/ft. The predominant groundwater <br /> direction has been to the east-northeast during the investigation. <br /> In our April 19, 2004 work plan GTI proposed additional groundwater plume definition and a <br /> pilot test for dual phase extraction/aquifer pumping. The San Joaquin County Environmental <br /> Health Division (SJC/EHD) approved the work plan in their May 21, 2004 facsimile <br /> correspondence. The first phase of the work was completed on October 26 - 27, 2004 with <br /> the installation of one extraction well and two monitoring wells. A dual phase . <br /> IL <br />
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