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Chevron Products Company 6
<br />Former Chevron Station #9-5775 301 West Kettleman Lane Lodi alifornia Oct er 9 2000
<br />is could potentially be used as remedial wells. Barings MW -8C,
<br />MW -IOC, and MW -19C will be converted into C -zone groundwater
<br />monitoring wells.
<br />Well Installation. Thirty (23) oxygen diffusion wells (OD -1 through OD -23),
<br />one (1) extraction well (EX -3), eleven (11) groundwater monitoring wells
<br />(MW -7B, MW -8C, MW -9B, MW -10C, MW -15, and MW -16B through
<br />MW -18B, MW -19C, MW -20A, and MW -20B) will be installed in the locations
<br />shown on Figure 3. Based on site groundwater data, the depth of the two (2) A -
<br />zone wells is anticipated to be approximately 65 feet bgs. The depth of the six
<br />(6) B -zone monitoring wells is anticipated to be approximately 90 feet bgs. The
<br />depth of the three (3) C -zone groundwater monitoring wells is anticipated to be
<br />up to approximately 140 feet bgs. The depth of the twenty-three (23) oxygen
<br />diffusion wells is anticipated to be approximately 100 feet bgs. The depth of the
<br />one (1) groundwater extraction well is anticipated to be approximately 80 feet
<br />bgs.
<br />• Soil Analysis. Selected soil samples (primarily those collected from borings
<br />converted into groundwater monitoring wells near or at the top of the water -
<br />bearing zones, and near or at the bottom of the borings) will be submitted to a
<br />California State -certified laboratory and analyzed for the presence of total
<br />petroleum hydrocarbons calculated as gasoline (TPHg), toluene, ethylbenzene,
<br />xylenes (BTEX compounds), and methyl tertiary butyl ether (MtBE), ethylene
<br />dibromide (EDB), 1,2-dichloroethane (1,2 -DCA), tertiary butyl alcohol (TBA),
<br />di -isopropyl ether (D1PE), ethyl tertiary butyl ether (EtBE), tertiary amyl methyl
<br />ether (TAME), ethanol, and methanol by EPA Methods 8015, 8020, and 8260.
<br />Groundwater Well Development, Surveying, and Sampling. Upon
<br />completion of well installation, the wells will be developed by surging as
<br />described in Attachment E. A licensed surveyor will survey the well elevations
<br />relative to a known benchmark. Groundwater levels in the wells will be
<br />measured and groundwater samples will be collected from the wells upon
<br />completion of well development.
<br />• Groundwater Analysis. Groundwater samples collected from the groundwater
<br />monitoring wells will be submitted to a California State -certified laboratory and
<br />analyzed for the presence of total petroleum hydrocarbons calculated as gasoline
<br />(TPHg), toluene, ethylbenzene, xylenes (BTEX compounds), and methyl tertiary
<br />butyl ether (MtBE), ethylene dibromide (EDB), 1,2-dichloroethane (1,2 -DCA),
<br />tertiary butyl alcohol (TBA), di -isopropyl ether (DIPE), ethyl tertiary butyl ether
<br />(EtBE), tertiary amyl methyl ether (TAME), ethanol, and methanol by EPA
<br />Methods 8015, 8020, and 8260.
<br />077.41991.04319-5775 W P 100900.doc
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