ARCHIVED REPORTS XR0006429 - Laserfiche WebLink

Home Browse Search

CIARWATER G R o v P, r N c The discharge fluids from RW-1 and RW-2 should pass through individual 1-inch diameter PVC lines, placed in a common system utility trench The discharge lines ' should be manifolded together after they come above ground in the remedial compound Prior to manifolding, a flowmeter/totalizer and a sample tap should be placed in the individual lines so that the wells can be monitored individually for water quality, flow and cumulative volume pumped After manifolding, the fluid should be passed through an oil/water separator capable of handling a maximum flow of 20 gpm to remove SPH from the fluid The SPH should be discharged to an adjacent storage tank equipped with a high fluid level sensor to provide automatic shut-off of the air compressor supplying the pumps A 55-gallon tank with double containment should be sufficient for SPH storage The SPH should be pumped out periodically by a licensed waste hauler for transport to an appropriate disposal/recycling facility The water from the oil/water separator should be plumbed through the aqueous- phase GAC vessels The aqueous-phase GAC vessels should be designed to accommodate flowrates up 20 gpm with influent hydrocarbon concentrations similar to those detected in water samples collected from well RW-1, while pumping (Table 2) and proposed well RW-2 It would be desirable to use vessels containing approximately 1,000 lbs of GAC to reduce maintenance costs incurred during visits to regenerate the GAC The water can be routed for discharge following GAC treatment Sample taps should be installed in the line immediately after the oil/water separator, between the GAC vessels, and a final effluent tap after complete water treatment Pressure gauges should be placed in the water process line before, between, and after the GAC vessels A flowmeter/totalizer should be installed in line after water treatment but prior to final water disposition Water may either be discharged to the canal (Lateral 4), located approximately 250 ' feet north of the site or to adjacent orchards or reinjected outside of the contaminated area If the water is discharged to the Lateral 4 canal, a National Pollution Discharge Elimination System permit from the Central Valley Regional Water Quality Control Board (CVRWQCB) will be required in addition to approval from managers of the canal, the Banta/Carbona Water District Reinjection or disposal to the land surface will require a General Order for Discharge of Treated ' Groundwater from a Petroleum Fuel Spill from the CVRWQCB Disposal to the land surface at adjacent orchards will require approval from the land owner and orchard manager This option may require a water storage tank so the orchard ' manager can control periods of water discharge The reinjection option would require infiltration wells or trenches capable of handling a total flow of 15 gpm These reinjection points could be located on the southwest corner of the property so they could flush contaminants toward the extraction wells Or, an infiltration gallery could extend from the southwest corner of the property for approximately 50 feet east, toward the proposed remedial compound ' D-107,PAR/RAP 24 February 21, 1996