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ARCHIVED REPORTS XR0005778
EnvironmentalHealth
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2900 - Site Mitigation Program
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PR0542421
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ARCHIVED REPORTS XR0005778
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Last modified
6/21/2019 2:40:55 PM
Creation date
6/21/2019 10:11:17 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2900 - Site Mitigation Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0005778
RECORD_ID
PR0542421
PE
2950
FACILITY_ID
FA0024377
FACILITY_NAME
COUNTRY CLUB BLVD/295950
STREET_NUMBER
1876
STREET_NAME
COUNTRY CLUB
STREET_TYPE
BLVD
City
STOCKTON
Zip
95204
APN
12319101
CURRENT_STATUS
01
SITE_LOCATION
1876 COUNTRY CLUB BLVD
P_LOCATION
01
QC Status
Approved
Scanner
SJGOV\wng
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EHD - Public
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Levels in MW-3 changed as follows : benzene decreased from 103 to <br /> 101 ug/L; toluene decreased from 12 . 0 to 6 . 0 ug/L; ethylbenzene <br /> ' decreased from 18 . 0 to 13 . 0 ug/L; xylene decreased from 36 0 to <br /> 22 . 0 ug/L; and TPHg decreased from 0 . 91 to 0 55 mg/L MTBE <br /> increased from 8 0 ug/L to 12 .0 ug/L <br /> ' Both MW-4 & MW-5 continue to be below detection levels for all <br /> compounds <br /> ' PLATES II through VI show the estimated lines of equal concen- <br /> tration of benzene, ethylbenzene, toluene, xylene, & TPHg based <br /> on the latest test results . They continue to show that the <br /> center of the plume is in the vicinity of MW-1, which has been <br /> confirmed by prior work. The shape of the plume has not changed <br /> significantly since monitoring began, indicating that it has <br /> stabilized. <br /> CONCLUSIONS <br /> ' 1 The limits of the soil & water plumes have been defined in <br /> all directions . There is no indication of an offsite source <br /> 2 . The groundwater plume has migrated no more than 100 feet to <br /> the north and 125 feet to the west of the site of UST' s, which <br /> were removed in 1989 . The highest levels of BTEX & TPHg have <br /> consistently been recorded from MW-1, indicating that there has <br /> ' been very little movement of the groundwater <br /> 3 Because the highest levels of contamination in both the soil <br /> ' and groundwater have been in the area of MW-1 and the north pump <br /> island, there is a good possibility that leaking product lines <br /> and/or the fuel dispensers on the north island contributed to the <br /> soil & water contamination. <br /> ' On October 3, 1996, WJH submitted a workplan addendum to the San <br /> Joaquin County EHD to place seven (7) shallow soil borings or <br /> ' geoprobe holes in an attempt to characterize the amount & volume <br /> of contaminated soil that exists beneath the property. That <br /> workplan was approved by the County EHD on October 16, 1996 . The <br /> State Cleanup Fund staff has approved the cost estimate submitted <br /> by WJH, and the work is scheduled to be completed within the next <br /> two weeks Upon completion, a report will be prepared and sub- <br /> mitt d to t San Joaquin EHD for review and response . <br /> ' Wm J. er & Associates cad <br /> c M Sanchez `�� I�1LL1�1�i J 11M, ER <br /> QCB <br /> ' <br /> NO M <br /> I <br /> ` <br /> 2 SIAOF CA1 <br /> L r <br />
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