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ARCHIVED REPORTS XR0011739
EnvironmentalHealth
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3500 - Local Oversight Program
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ARCHIVED REPORTS XR0011739
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Last modified
11/19/2024 10:19:08 AM
Creation date
9/4/2019 10:56:57 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0011739
RECORD_ID
PR0544801
PE
3528
FACILITY_ID
FA0003210
FACILITY_NAME
TEXACO TRUCK STOP
STREET_NUMBER
7500
Direction
W
STREET_NAME
ELEVENTH
STREET_TYPE
ST
City
TRACY
Zip
95378
APN
25015018
CURRENT_STATUS
02
SITE_LOCATION
7500 W ELEVENTH ST
P_LOCATION
03
P_DISTRICT
005
QC Status
Approved
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EHD - Public
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Site Characterization Report: 7500 West Eleventh Street. Tracy, CA. Page 26 <br /> i <br /> groundwater recovered from PP-4 and MW-4 were 400 µg/L and 300 µg/L, respectively. <br /> The corresponding concentrations of gasoline in the groundwater at those locations were <br /> 880 µg/L and 52 pg/L, respectively. {Note: a similar relationship exists between the <br /> concentrations of MTBE in samples of groundwater recovered from MW-2, MW-3 and <br /> MW-4: MTBE was present in MW-3 at a concentration of 10,000 µg/L, but less than <br /> 1,000 µg/L in MW-4, and there was only 4.6 µg/L of that oxygenate in the groundwater <br /> sample recovered from MW-2.} <br /> r ; <br /> By examining the results of analysis of samples of soil recovered from PP-2, PP-3 and <br /> PP-4 and MW-2, MW-3 and MW-4 that are presented in Table 2, it can be seen that the <br /> distribution fuel hydrocarbons in the soil reflects their distribution in groundwater. <br /> With the exception of a trace of diesel detected in a sample recovered from a depth of 14 <br /> { ft, none of the soil samples recovered from PP-2, which was located just west of the <br /> ' = dispenser islands, contained any detectable concentrations of TPHd, TPHg or the BTEX <br /> compounds. Soil samples recovered from MW-2, located further to the west near the <br /> boundary of the 7500 West Eleventh Street property, were also free of any detectable <br /> sr} concentrations of TPHg or the BTEX compounds. However, a trace of an unidentified <br /> hydrocarbon in the diesel range was detected at a concentration of 1.90 mg/Kg from a <br /> soil sample recovered from a depth of 5 ft in that well boring. <br /> With the exception of traces of gasoline in a soil sample recovered from the shallow <br /> depth of 4 ft, samples from PP-4 were free of petroleum hydrocarbons. Low <br /> concentrations of diesel-range hydrocarbons up to 122 mg/Kg and gasoline-range <br /> f <br /> hydrocarbons ranging from 3.8 to 170 mg/Kg were detected in soil samples recovered <br /> from shallow depths in MW-4. No petroleum hydrocarbons were detected in samples <br /> recovered from deeper than 11 ft BGS in either boring. <br /> i Soil samples recovered from PP-3 and MW-3 revealed concentrations of diesel and <br /> gasoline that were generally elevated compared to those detected in the borings located to <br /> their east or west along the West Eleventh Street frontage of the subject property. Also, <br /> } ' petroleum hydrocarbons were found to be resent at <br /> particularly in the case of MW-3, p y p <br /> significantly greater depths in those borings than in borings to their east or west. <br /> However, the concentrations detected in the samples recovered from the MW-3 and PP-3 <br /> . borings are, in absolute terms, very low. The maximum concentration of diesel detected <br /> in the samples recovered from PP-3 was only 54 mg/Kg and the corresponding value for <br /> gasoline was 15 mg/Kg; similarly, the maximum concentration of diesel detected in <br /> i; samples recovered from MW-3 was 16.9 mg/Kg and the corresponding value for gasoline <br /> in a sample from that boring was 18 mg/Kg. <br /> The low concentrations of fuel hydrocarbons detected in soil samples recovered from PP- <br /> 3 and MW-31notable given the close proximity of those borings to the over-excavated <br /> Dispenser Pit, from which soil affected by high concentrations of petroleum <br /> hydrocarbons was removed in December 1998. The absence of significant concentrations <br /> ' of analytes of concern in soil samples recovered from those borings indicates that Dietz <br /> Irrigation had over-excavated a sufficient area to successfully remove the soil most <br /> sic <br />
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