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EHD Program Facility Records by Street Name
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3500 - Local Oversight Program
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PR0543735
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Last modified
9/10/2018 8:56:18 AM
Creation date
9/10/2018 8:45:09 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
FIELD DOCUMENTS
RECORD_ID
PR0543735
PE
3528
FACILITY_ID
FA0007486
FACILITY_NAME
COUNTRY MARKETPLACE
STREET_NUMBER
1789
Direction
W
STREET_NAME
CHARTER
STREET_TYPE
WAY
City
STOCKTON
Zip
95206
APN
16337023
CURRENT_STATUS
02
SITE_LOCATION
1789 W CHARTER WAY
P_LOCATION
01
P_DISTRICT
001
QC Status
Approved
Scanner
TMorelli
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EHD - Public
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,%W <br />4.2 Groundwater <br />TPHG was detected as high as 12,000 ppb in the heart of the dissolved contaminant plume in <br />September 1995. TPHG was recently detected at a maximum concentration of 5,500 ppb. <br />Benzene was detected at a maximum concentration of 120 ppb. Downgradient monitoring wells <br />MW 1 and MW2 were non -detect for petroleum hydrocarbon constituents. The lateral extent of <br />the dissolved hydrocarbon plume has been essentially defined. However, the presence of <br />overhead and underground utilities on the western and southern boundaries of the property <br />prevented establishing a "zero line" for the dissolved contaminant plume. TPHG and benzene <br />were detected at 400 and 2.4 ppb, respectively, in boring SB7 near the western property <br />boundary, and at 2000 and 20 ppb, respectively in boring SB6 near the southern property <br />boundary. Nevertheless, based upon the relatively impermeable soil and the evidence of intrinsic <br />bioremediation occurring beneath the site, we would expect the lateral extent of petroleum <br />hydrocarbons beneath the site to be severely limited. The estimated extent of dissolved <br />petroleum hydrocarbons beneath the site is shown on Figure 3. <br />5.0 SPECIFIC INFORMATION FOR CLOSURE REQUEST <br />—' <br />5.1 Introduction <br />This section provides information specifically required for closure review as per Appendix B of <br />the Tri -Regional Board Staff Recommendations. <br />5.2 Rationale for Closure with Residual Petroleum Hydrocarbon Impacted Groundwater <br />The source of the hydrocarbon release(s) has been removed with the excavation of the former <br />underground fuel storage tanks and the impacted soil. Approximately 1,530 cubic yards of <br />contaminated soil was removed and remediated by passive aeration. The treated soil was <br />verified clean by laboratory analysis and was subsequently used as backfill <br />The total volume of affected material removed was approximately 1,530 cubic yards. Due to <br />the minimal regulatory oversight of the project, insufficient historical data is available to provide <br />groundm\nnuioklosure 10 <br />
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