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ARCHIVED REPORTS XR0010119
EnvironmentalHealth
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3500 - Local Oversight Program
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PR0544463
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ARCHIVED REPORTS XR0010119
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Last modified
11/19/2024 10:19:05 AM
Creation date
5/16/2019 8:48:16 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0010119
RECORD_ID
PR0544463
PE
3528
FACILITY_ID
FA0003214
FACILITY_NAME
EASTGATE BUSINESS PARK*
STREET_NUMBER
757
Direction
E
STREET_NAME
ELEVENTH
STREET_TYPE
ST
City
TRACY
Zip
95378
APN
25026001
CURRENT_STATUS
02
SITE_LOCATION
757 E ELEVENTH ST
P_LOCATION
03
P_DISTRICT
005
QC Status
Approved
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SJGOV\wng
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EHD - Public
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Mr HarILn Knoll Environmental <br /> 27 January 2000 Resources <br /> Page 3 Management <br /> results are summarized in Tables 1 and 2 (Attachment A) Copies of the <br /> laboratory analytical results and well sampling data are included as <br /> ' Attachments B and C, respectively <br /> Evaluation of Results- UST 1 <br /> Groundwater sampling results for the current sampling event for wells in <br /> 1 the vicinity of former UST I are presented in Table 1 As shown, the <br /> concentration of TPH-g and BTEX compounds in the wells downgradient <br /> of the former tank location (MW-1 and MW-4) are similar to, or less than <br /> those present before ORC injection was performed In well MW-3, <br /> located upgradient of the former tank location, concentrations of these <br /> 1 compounds were not, and have never been, detected <br /> Evaluation of Results - UST 2 <br /> Groundwater sampling results for the current sampling event for wells in <br /> the vicinity of former UST 2 are presented in Table 2 As shown, <br /> concentrations of TPH-g and BTEX compounds to wells downgradient of <br /> the former tank location (MW-2 and MW-b) are less than those exhibited <br /> before ORC injection was performed The results of this round of <br /> sampling are also consistent with the overall decreasing trend in <br /> chemical concentrations observed at UST 2 since groundwater sampling <br /> was initiated In well MW--5, located upgradient of the former tank <br /> location,concentrations of these compounds were not, and have never <br /> been, detected <br /> EVALUATION OF HISTORICAL GROUNDWATER SAMPLING <br /> ' RESULTS <br /> Evaluation of Results - UST 1 <br /> At MW-1, chemical concentrations detected during the June,September, <br /> 1 and October 1999 sampling events (following ORC injection) were less <br /> than those detected prior to ORC injection The concentrations detected <br /> during each of these sampling events were also relatively stable During <br /> the most recent sampling event, TPH-g and BTEX concentrations <br /> increased to concentrations similar to those detected prior to ORC <br /> injection, but still remain relatively low Overall, the concentrations of <br /> compounds in groundwater at this location have remained low and <br />
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