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ARCHIVED REPORTS XR0013118
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ARCHIVED REPORTS XR0013118
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Last modified
11/19/2024 10:19:10 AM
Creation date
12/14/2018 4:56:34 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2900 - Site Mitigation Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0013118
RECORD_ID
PR0515454
PE
2960
FACILITY_ID
FA0012157
FACILITY_NAME
POMBO REAL ESTATE
STREET_NUMBER
1755
Direction
W
STREET_NAME
ELEVENTH
STREET_TYPE
ST
City
TRACY
Zip
95376
APN
23217020
CURRENT_STATUS
01
SITE_LOCATION
1755 W ELEVENTH ST
P_LOCATION
03
P_DISTRICT
005
QC Status
Approved
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M. Scott Mansholt -3 - 8 March 2005 <br /> ChevronTexaco <br /> Pombo Property <br /> obtained from several locations where access was available. TPH-d ranged from ND at two downgradient <br /> locations to 86 µg/L to 370 4g/L;BTEX compounds were not detected. Phenanthrene at 0.4 µg/L was the <br /> only PAH detected. <br /> A well survey for domestic,irrigation, or municipal supply wells within two thousand feet of the project <br /> revealed that nine private wells were identified;six were identified as domestic supply; one was listed as <br /> an industrial supply well, and two were listed as unknown. Four are located between 400 and 2,000 feet <br /> upgradient; four are crossgradient,:and the industrial well is downgradient and the location is not <br /> specified. Review of Department of Water Resources well completion records indicate that with one <br /> exception,the wells were completed with greater than 50-foot.sanitary surface seals. A well, <br /> approximately 1,500 feet crossgradient,has a listed seal of 12 feet. Three crossgradient wells have <br /> unspecified seal depths. These surface seals extend below the shallow groundwater that occurs at this <br /> site. Considering the depths of the sanitary seals coupled with the distance from the project site, <br /> dissolved petroleum constituents likely will not affect these water supply wells. <br /> Regional Board staff concurs that the lateral and vertical extent of soil impacted by petroleum <br /> hydrocarbons has been adequately characterized. We also concur that the groundwater plume has been <br /> adequately delineated off-site(downgradient), appears to be limited in extent, is stable,and meets the. <br /> criteria for closure in accordance with the draft Regional Board"Low Risk Criteria",Appendix B–No <br /> Further Action Requests.(1996; updated September-2001). <br /> Provided the information your consultant(s)submitted was accurate and representative,no further action is <br /> needed at the above-referenced,property. Nothing in this determination is intended or shall be construed to <br /> ~ limit or preclude the Regional.Board or any other agency from taking any further action if new information <br /> related to the OVP reveals that additional assessment is warranted. <br /> By 15 June 2005,please submit a No Further Actio:request for the-Pombo property, including technical <br /> information,maps,etc., in support of the site closure request. Additionally, as suggested by DTSC, <br /> include documentation that a non-residential deed restriction has been properly recorded for the site. <br /> If you have any questions or comments,please.contact Dean Hubbard at(559)445-5179. <br /> SHELTON R. GRAY — C.DEAN HUBBARD <br /> Senior Engineering Geologist Engineering Geologist <br /> RG No. 6357 <br /> cc: Mike Pfister, DTSC,Clovis <br /> Michael lnfurna, San Joaquin County EHD,Stockton <br /> Luis Mercado, SAIC,Sacramento <br /> SL1C/E/ChevronTexaco0VP/Former Pombo <br />
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