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<br />Chevron Products Company 7
<br />Former Chevron Service Station #9-5775, 301 West Kettleman Lane, Lodi, California lune 5, 200I
<br />environmental technician sampled both existing and newly installed monitoring wells
<br />Groundwater elevation data and analytical results are presented as Tables 3 and 4, respectively, and
<br />are summarized below
<br />Concentrations of TPHg, BTEX compounds, MtBE, TBA, dinsopropyl ether (RIPE), EtBE,
<br />TAME, 1,2 dichloroethene (1,2 -DCA), ethylene dibromide (EDB), ethanol, and methanol were not
<br />detected in A -Zone wells MW -2, MW -12A, MW -13, and MW -20A TPHg was reported in two
<br />A -zone wells at concentrations of 980 ug/l (MW -3) and 84 ug/l (MW -4) Benzene was reported m
<br />three A -zone wells at concentrations ranging from 0 52 ug/l (MW-1IA) to 380 ug/l (MW -3).
<br />MtBE was reported in twelve A -Zone wells at concentrations ranging from 0 63 ug/l (MW -8A) to
<br />2,000 ug/l (EX -3) TBA was reported in well MW -4 and EX -3 at concentrations of 13 ug/l and 240
<br />ug/l, respectively EtBE was reported in eight A -Zone wells at concentrations ranging from 0 52
<br />ug/l (MW -6) to 88 ug/l (EX -3) TAME was reported in A -zone wells MW -1, MW -4, MW -9A,
<br />MW-14/EX-2, and EX -3 at concentrations ranging from 0 70 ug/l (MW-14/EX-2) to 20 ug/l (EX -
<br />3) Methanol was detected in three A -zone wells (MW -6, MW -10A, and MW -11A) at
<br />concentrations ranging from 79 ug/1 to 230 ug/1 Ethanol was detected in three A -zone wells
<br />(MW -6, MW- 1OA, and MW -I IA) at concentrations ranging from 12 ug/l to 24 ug/l
<br />Concentrations of TPHg, BTEX compounds, MtBE, TBA, DIPE, EtBE, TAME, 1,2 -DCA, EDB,
<br />and methanol were not detected in B -Zone wells MW -7B, MW -I IB, MW -12B, MW -17B, MW -
<br />18B, and MW -20B Benzene, toluene, and xylenes were reported in well MW -5B at
<br />concentrations of 0 59 ug/l, 13 ug/l, and 18 ug/l, respectively. MtBE was reported in four B -Zane
<br />wells at concentrations ranging from 0 60 ug/l (MW -9B) to 7 2 ug/l (MW -5B) Ethanol was
<br />reported in three B -Zone wells at concentrations ranging form 5 0 ug/l (MW -18B) to 25,000 ugll
<br />(MW -9B) EtBE was reported in B -Zone well MW-IOB at a concentration of 2 1 ug/l.
<br />Concentrations of TPHg, BTEX compounds TBA, DIPE, EtBE, TAME, 1,2 -DCA, EDB, and
<br />methanol were not detected in C -Zone wells MW -IOC and MW -19C MtBE was reported m MW-
<br />lOC and MW -19C at concentrations of 7 5 ug/1 and 0 99 ug/l, respectively Ethanol was reported
<br />in both MW -1 OC and MW -19C at concentrations of 100 ug/l and 4,400 ug/l, respectively
<br />Petroleum hydrocarbons and fuel oxygenates were not detected in sentinel well MW -8S. Ethanol
<br />was reported at a concentration of 1,900 ug/1
<br />Site wells were gauged on the March 21, and 22, 2001 (Table 3) Potentiometric maps for A and
<br />B -Zone wells are presented as Figures 4 through 7 Table 4 presents the groundwater monitoring
<br />well analytical results Field and analytical data sheets are presented as Attachment H
<br />Groundwater isoconcentration contour maps for TPHg, benzene, and MtBE in A -zone wells are
<br />presented as Figures 8, 9, and 10, respectively A groundwater isoconcentration contour map for
<br />MtBE in B -zone wells is presented as Figure 11
<br />I1Chevron1957751ParFrp\9-5775PARFRP2 dac
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