|
. 5 Stratus received authority to construct (December 23, 2003)from SJVAPCD
<br /> 6 Stratus coordinated with PG & E to procure electrical service to operate SVE system
<br /> WORK PROPOSED FOR NEXT QUARTER(First 2004)
<br /> 1 Stratus will continue to remove floating product from well MW-1 on a weekly basis, monitor free
<br /> product thickness in selected wells, and remove floating product when present
<br /> 2 The next sampling event is tentatively scheduled for March 2004 Groundwater samples will be
<br /> analyzed for total petroleum hydrocarbons as gasoline (TPHG), benzene, toluene, ethylbenzene,
<br /> total xylenes (BTEX), tertiary butyl alcohol (TBA), methyl tertiary butyl ether (MTBE), di-isopropyl
<br /> ether(DIPS), ethyl tertiary butyl ether (ETRE), tertiary amyl methyl ether(TAME), 1,2-dichloroethane
<br /> (1,2-DCA), 1,2-dibromoethane (EDB), and ethanol using USEPA Method 8260B
<br /> 3 Stratus will implement the scope of work outlined in the Work Plan dated October 15, 2002
<br /> 4 Stratus will continue to coordinate with PG&E for procuring a power supply to operate the SVE
<br /> system
<br /> 5 Upon receiving the electrical service, Stratus will conduct system startup and source testing
<br /> DISCUSSION
<br /> During the weekly visits to the site and the quarterly monitoring event, product was measured in well
<br /> MW-1 at thicknesses ranging from 0 03 to 0 08 feet thick, and in well VW-4 at approximately 0 11 feet
<br /> thick During each site visit, free product in the wells was manually bailed, and placed in properly labeled
<br /> DOT approved drums pending disposal Approximately 22 gallons of a product/water mixture was bailed
<br /> from wells MW-1 and VW-4 during the fourth quarter 2003 Approximately 171 gallons of product/water
<br /> mixture have been bailed to date Product thickness measurements and volumes of liquid bailed are
<br /> summarized in Table 1
<br /> In wells MW-3, MW-4, MW-6, MW-8, MW-9, VW-1 through VW-3, VW-6, VW-7, VW-10, VW-12, VW-14,
<br /> VW-18, and VW-20, there was less than 1 foot of water column in the well, the water in these wells does
<br /> not appear to be formation water Wells MW-5, MW-7, VW-4, VW-8, VW-9, VW-11, VW-13, VW-16,
<br /> VW-17, and VW-19 were dry Well VW-15 was obstructed Groundwater in wells screened within the
<br /> upper water-bearing zone (MW-2, VW-5, and VW-6) were measured at depths between 45 26 and 59 97
<br /> feet below bgs MW-2 and VW-6 decreased approximately 0 12 to 1 27 feet from the groundwater
<br /> elevations measured during the third quarter 2003, and VW-5 increased approximately 1 69 feet
<br /> Groundwater in well MW-1 (screened in the lower water-bearing zone)was measured at 104 90 feet bgs,
<br /> 0 07 feet higher than the groundwater measured during the third quarter 2003 monitoring event These
<br /> data are similar to groundwater data from previous quarters Groundwater measurements are
<br /> summarized in Table 2 Groundwater elevations are included in Figure 2 Wells that contained a small
<br /> amount of water but are interpreted to be dry are indicated as"dry" on Figure 2
<br /> During the fourth quarter 2003 sampling event, TPHG (86 pg/L), benzene (0 63 pg/L), and total xylenes
<br /> (0 58 pg/L) were reported in the sample collected from well VW-5 Fuel oxygenates, including MTBE,
<br /> were not reported in any of the wells Petroleum hydrocarbons or fuel oxygenates were not reported in the
<br /> domestic well These data are similar to chemical analytical data from previous quarters TPHG,
<br /> benzene, and MTBE analytical data for the samples collected on December 23, 2003, are presented in
<br /> Figure 3 Analytical data were submitted to the State Water Resources Control Board as required by
<br /> AB2886 The electronic delivery receipt is attached in Appendix C
<br /> P IBp-Arco for URS161001Quarterly120031Arco_6100 4Q03 doe 57RATU5
<br />
|