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<br />10/10/00 TOTE 17:07 FAX 1 916 861 0430 SECOR-SACRAMENTO Z 007
<br />Chevron Products Company 6
<br />Farmer Chevron Station 4,M775. 301 Won Kettfeman Lane, Dodi. Calj fpmsa QfdSLbet 4 2400
<br />could potentially be used as remedial wells. Borings MW -8C,
<br />MW -IOC, and MW -19C will be converted into C -zone groundwater
<br />monitoring wells.
<br />Well %stsllation. Thirty (23) oxygen diffusion wells (OD -1 through OD -23),
<br />one (1) extraction well (EX -3), eleven (11) groundwater monitoring wells
<br />(MW -713, MW -SC, MW -9$,1 W -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 (DIPS), ethyl tertiary butyl ether (ELBE), tertiary amyl methyl
<br />ether (TAME), ethanol, and methanol by EPA Methods 5015, 8020, and 5260.
<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 />a 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 />(1'PHg), 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 (D1PE), ethyl tertiary butyl ether
<br />(EtBE), tertiary amyl methyl ether (TAME), ethanol, and methanol by EPA
<br />Methods 8015, 5020, and 8260.
<br />077,41991-04119-5775 WP 1009Dd.doc
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