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BENJAMIN HOLT
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2908
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3500 - Local Oversight Program
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PR0544111
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Last modified
2/7/2019 12:07:10 PM
Creation date
2/7/2019 10:31:09 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
WORK PLANS
RECORD_ID
PR0544111
PE
3528
FACILITY_ID
FA0003625
FACILITY_NAME
ARCO STATION #83560*
STREET_NUMBER
2908
Direction
W
STREET_NAME
BENJAMIN HOLT
STREET_TYPE
DR
City
STOCKTON
Zip
95207
APN
09763032
CURRENT_STATUS
02
SITE_LOCATION
2908 W BENJAMIN HOLT DR
P_LOCATION
01
P_DISTRICT
002
QC Status
Approved
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EHD - Public
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5-3 <br /> Groundwater Remediation <br /> The existing on-site monitoring and recovery system installed by <br /> GR and EMCON should be retained and utilized. No additional on-site <br /> monitoring or recovery wells are necessary. <br /> The permit required for discharging the water pumped by the <br /> recovery system into the RWCF sanitary sewer system should be <br /> renewed. Conversations with the RWCF personnel indicate that renewal <br /> of the discharge permit and continued pumping should not be a <br /> problem, as long as hydocarbon constituents in the water are below <br /> combustible levels. <br /> Soil Remediation <br /> Based on the soil and groundwater conditions at the site, two <br /> possible soil remediation techniques are discussed below. Both are <br /> considered to be applicable and feasible alternatives, but in situ <br /> aeration is recommended as the most effective means of soil <br /> remediation. ARCO and BC will evaluate the method which will be the <br /> most effective at the site. <br /> In-Situ Aeration. An in-situ aeration system is recommended as <br /> the most effective means of eliminating hydrocarbon vapors from the <br /> soil, as well as the groundwater beneath the site. It would consist <br /> of a system of vertical, manifolded, vapor extraction wells connected <br /> to a single vacuum system. The vacuum system would be located in the <br /> northwest corner of the site, as far as possible from residential <br /> areas. <br /> The vapors recovered through the system would be incinerated, <br /> adsorbed through carbon adsorption, or discharged directly to the <br /> atmosphere. An aeration permit must be obtained from the San Joaquin <br /> County Air Pollution Control District. <br /> Soil Flushing. An alternative to in situ aeration is soil <br /> flushing . This method involves using water to "flush" hydrocarbons <br /> out of the soil into the groundwater system. This method would be <br /> effective at this site because of the silty to sandy soils, the <br /> shallow groundwater , and the functioning recovery system. <br /> Additional Investigative Work <br /> In addition to the groundwater and soil remediation, the <br /> following investigative work is recommended for the site. <br /> Work Plan and Permits. Prior to performing additional investi- <br /> gative work at the site, a detailed work plan should be prepared in <br /> accordance with San Joaquin County requirements. Necessary permits <br /> would be obtained for drilling, encroachment, discharge, and aeration <br /> purposes. A work plan for additional investigative work is included <br /> as Appendix G. <br />
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