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ARCHIVED REPORTS_XR0005088
EnvironmentalHealth
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3500 - Local Oversight Program
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PR0545571
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ARCHIVED REPORTS_XR0005088
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Last modified
9/16/2020 1:42:05 AM
Creation date
3/18/2020 4:03:36 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0005088
RECORD_ID
PR0545571
PE
3528
FACILITY_ID
FA0003570
FACILITY_NAME
BOBS MUFFLER & RADIATOR
STREET_NUMBER
466
STREET_NAME
MOFFAT
STREET_TYPE
BLVD
City
MANTECA
Zip
95336
APN
22104019
CURRENT_STATUS
02
SITE_LOCATION
466 MOFFAT BLVD
P_LOCATION
04
P_DISTRICT
005
QC Status
Approved
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SJGOV\sballwahn
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EHD - Public
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. Appendix B <br /> AGE-NC-Project No. 98-0520 <br /> Page 4 of 6 <br /> Using 4.5 mg/kg as the average concentration of gasoline in the fourth (outer) zone, the weight of <br /> gasoline is: <br /> V4 • typical weight of soil • average concentration of contaminant - <br /> 95,420 ft3 • 125 lbs/ft' • 0.0000045 -1� 53.7 lbs of gasoline <br /> All together, the weight of gasoline from zones 1, 2, 3 and 4 is: <br /> 130.9 lbs + 714.0 lbs +425.6 lbs + 53.7 lbs -4 1,324.2 lbs of gasoline <br /> Convert pounds of gasoline to volume (gallons) using density of gasoline equal to 6.25 lbs/gal: <br /> 1,324.2 lbs_6.25 lbs/gal -+ 211.9 gallons of gasoline <br /> • Combining the total volume of gasoline at the different concentrations,impacted soil yields a grand <br /> total of approximately 185,861 ft'containing an estimated 211.9 gallons of gasoline,equivalent to <br /> 1,324.2 pounds of gasoline. <br /> GROUND WATER MASS-VOLUME CALCULATIONS <br /> Assumptions: 0� ( �� <br /> • Utilizing Figures 5 an 6, the mass distribution of total petroleum hydrocarbon <br /> concentrations on-site can approximated by three contoured zones, with the inner zone <br /> containing the highest TPH-g concentrations and the outer zone containing the lowest. The <br /> volume of the zones were approximated utilizing AutoCAD and the cross-section A-A' <br /> The volume of the zones can be calculated by the formula: <br /> V =A h, where "A" is the area as calculated by AutoCAD (Figure 6) and <br /> "h" is the average height of the zone (Figure 5). <br /> 1) For the estimated inner zone (1,000 µg/l contour line): A = 6,219 ftx and h = 5.8 ft <br /> 2) For the estimated second zone (100 µgll contour line): A= 13,232 ft2 and h= 8.3 ft. <br /> Advanced GeoEnvironmental,Inc. <br />
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