|
z
<br />Chevron Products Company Januiary 12, 2001
<br />Former Chevron 9-5775, 301 West Kettleman Lane, Lodi, CA
<br />isopropyl ether (D1PE), ethanol, methanol, ethylene dibromide (EDB), and 1,2-
<br />dichloroethane (1,2 -DCA) concentrations were reported as below detection limits
<br />December 27, 2000 midpoint i concentrations of MtBE and TBA were reported as 90
<br />ug/1 and 40 ug/l, respectively TPHg, BTEX, DIPE, EtBE, TAME, ethanol, methanol,
<br />EDB, and 1,2 -DCA were reported as below detection limits
<br />December 27, 2000, midpoint 2 concentrations of TBA were reported as 14 ug/1 TPHg,
<br />toluene, xylenes, DIPE, methanol, EDB, and 1,2 -DCA concentrations were reported as
<br />below detection limits
<br />Effluent concentrations of petroleum hydrocarbons and fuel oxygenates were reported as
<br />below detection limits during the December 27, 2000, sampling event
<br />SECOR is currently working with U S Filter/Westates to replace the first carbon vessel
<br />and reconfigure the GWE system
<br />Between August 31 and December 27, 2000, the GWE system discharged a total of
<br />407,322 gallons of treated groundwater (Table 2) As of December 27, 2000, the GWE
<br />system has treated a total of 420,182 gallons Calculated discharge rates during the
<br />fourth quarter monitoring period ranged from 0 03 to 8 78 gallons per minute
<br />During the fourth quarter monitoring period the system extracted approximately 194
<br />pounds of TPHg, 0 019 pounds of benzene, and 22 55 pounds of MtBE To date, the
<br />system has extracted an estimated 3 36 pounds of TPHg, 0 115 pounds of benzene, and
<br />42 49 pounds of MtBE Plots of GWE system mass removal trends and influent
<br />groundwater TPHg, benzene, and MtBE concentrations versus time are shown on
<br />Figures 3 and 4, respectively Remedial system operation and maintenance field data
<br />sheets, certified analytical reports, and chain -of -custody documentation are included in
<br />Attachment A
<br />SUMMARY OF SVE SYSTEM OPERATION
<br />The SVE system is comprised of four vertical SVE wells (VE -1 through VE -4), a 5
<br />horsepower (hp) positive -displacement blower, and a Falco 100 catalytic oxidizer The
<br />SVE system is permitted by the San Joaquin Valley Air Pollution Control District
<br />(SJVAPCD) for operation through May 5, 2010 (Permit No N-4343-1-0)
<br />SVE system runtimes were estimated to be 86 percent between August 31 and
<br />December 27, 2000 Downtime was due to power outages, routine maintenance, and the
<br />performance of an aquifer test SVE system operational and analytical data are
<br />presented in Table 3 The maximum influent concentrations of TPHg, benzene, and
<br />MtBE were reported as 1,981 parts per million by volume (ppmv), 24 1 ppmv, and 68
<br />ppmv, respectively
<br />Based upon the above data, the SVE system removed approximately 2,722 1 pounds of
<br />TPHg, 32 2 pounds of benzene, and 108 1 pounds MtBE from soil beneath the site
<br />077 41991 043/Remedial system Evaluation Report doc
<br />R_-
<br />
|