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WASTE DISCHARGE REQUIREMENTS ORDER NO. -2- m
<br /> KEARNEY-NATIONAL, INC. AND UPRIGHT CONSTRUCTION 1
<br /> FORMER KEARNEY-KPF FACILITY
<br /> GROUNDWATER TREATMENT AND DISPOSAL SYSTEM
<br /> SAN JOAQUIN COUNTY
<br /> 5. WDR Order No. 91-220, adopted by the Board on 22 November 1991, set waste discharge
<br /> requirements (WDRs)for treated groundwater disposal with monthly average discharge effluent T
<br /> limits of 0.5 micrograms per liter(µg/1)for 1,1,1-trichloroethane (1,1,1-TCA), 1,1-dichloroethene {L{i
<br /> (1,1-DCE),trichloroethene (TCE),tetrachloroethene (PCE), and 1,1-dichloroethane (1,1-DCA), and
<br /> a monthly average concentration limit for total VOCs of 1.0 µg/l.
<br /> 6. In 1998, Kearney tested the groundwater for 1,4-dioxane and found up to 51 µg/l. Since the
<br /> groundwater extraction and treatment system was not designed to remove 1,4-dioxane, Kearney
<br /> shut the system down in October 1998 to prevent re-injection of 1,4-dioxane into the
<br /> groundwater.
<br /> 7. Kearney's 1 I August 2000 Remedial Action Plan describes measures to complete the groundwater
<br /> remediation at the Site, including 1,4-dioxane. Up to 160 gallons per minute of groundwater will m
<br /> be extracted from up to five wells with estimated influent concentrations of 1,4-dioxane, 1,1,1- 1
<br /> TCA, 1,1-DCE, TCE,PCE, and 1,1-DCA of 103 µg/l, 0.46 µg/1, 31 µg/1, 33 µg/1, 9.2 gg/l, and 2.1
<br /> µg/1,respectively. Extracted groundwater will be treated with an ultraviolet-oxidation (UV/OX)
<br /> unit, followed by an air stripper and two GAC beds. Treatment will achieve levels below
<br /> discharge requirements for VOCs. Treated groundwater will be discharged to INJ-1 or into
<br /> shallow and intermediate zone wells in the vicinity of Pond 2 to flush residual VOCs. Regional e
<br /> water levels will determine flow rates and whether treated groundwater is injected into INJ-1 or [ ,
<br /> into shallow zone wells SMW-1, SMW-2, SMW-4, and SMW-5, shallow zone piezometers
<br /> KPS-5, TP-1 A, and TP-3A, or intermediate zone wells KEW-1U and KEW-2U. Injection into
<br /> the shallow and intermediate wells and piezometers will occur during low water table conditions.
<br /> Regional Board staff conditionally approved the Remedial Action Plan in a letter dated 13 October r n
<br /> 2000. The groundwater extraction and disposal system is shown on Attachment B, which is 1
<br /> attached hereto and made part of this Order by reference.
<br /> 8. The Site has 45 monitoring wells, which have been sampled regularly as required by the
<br /> Monitoring and Reporting Program No. 91-220 to show treatment system effectiveness, plume
<br /> capture, and plume cleanup. The Discharger reports data on a semi-annual basis. I
<br /> 9. Once the new treatment system is installed, Kearney will collect samples from the groundwater 1
<br /> influent, the treated water leaving the first GAC, and the treated water exiting each subsequent
<br /> treatment vessel at system startup, after one, four, 12, and 24 hours of operation, weekly for
<br /> the first month of operation, and monthly thereafter. ,r T
<br /> 10. As described in the Water Quality Control Plan for the Sacramento River and San Joaquin River V
<br /> Basins, Fourth Edition,(hereafter Basin Plan), groundwater cleanup goals range between
<br /> background concentrations to the water quality objectives (WQO),unless background for
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