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Download Excel NPDES Self Monitoring Program
Chevron U.S.A. Inc. and Cawelo Water District Produced Water Reclamation Project Kern River Area Station 36 Kern River Oil Field
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Organization
Chevron U.S.A Inc.show partners CVRWQCB
Program website
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Plan contactGary Piron
661-393-2808
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| Start date | 12/06/2007 |
| End date | None |
| Objectives | Chevron recovers crude oil in the Kern River Oil Field. Oil and water produced from the
field is collected and routed to the Facility in Section 5, T29S, R28E, MDB&M. Chevron extracts approximately
nine barrels (bbls) of water for every bbl of crude oil produced. Treatment consists of
mechanical separation, sedimentation, air floatation (Wemco units), and filtration (walnut
hull vessels). The Facility has the capacity to process up to 37.8 million gallons per day
(mgd) of produced water. Attachment C provides a flow schematic of the treatment
process at the Facility.
Some of the produced water is used at the various leases in the oil field and some is
converted to steam by cogeneration plants and steam generators for reinjection back into
the oil reservoir to enhance recovery. Steam injection wells are Class II injection wells
permitted by the California Division of Oil, Gas, and Geothermal Resources. The
cogeneration produced water feed is softened for corrosion control before it is converted to
steam. The softening process produces brine water that is disposed of in permitted Class II
injection wells. The cogeneration plants utilize reverse osmosis (RO) to treat water from
five source water wells for nitrogen oxide emission control in the cogeneration plants. The
RO reject water is also disposed of in permitted Class II injection wells. Treated produced
water not used for steam generation or injection is treated and conveyed via a newly
constructed, coated steel pipeline to CWD Reservoir B. Reservoir B is in Section 17, T28S,
R27E, MDB&M. Prior to discharge to Reservoir B, treated produced water enters a
polishing pond (adjacent to Reservoir B) for final treatment. Constructed in 2003, the pond
includes concrete and PVC liners and has a 2.5 million gallon capacity.
The CWD covers approximately 45,000 acres and is generally between State Highway 99
and Highway 65. The CWD was formed for the purpose of obtaining a supplemental or
partial water supply and delivering it for irrigation of crops within the CWD. The CWD
uses imported surface water, pumped groundwater, and treated produced water to provide
and meet irrigation needs of the agricultural lands of the CWD.
In August 1994, Texaco Exploration and Production Inc. (now Chevron) and CWD
executed an agreement whereby reclaimed produced water is provided to CWD. Chevron
and CWD executed an updated agreement in September 2006. Reservoir B is an integral
part of CWDs water distribution system and supplies irrigation water used in the CWD via
the Distribution Canal. Treated produced water received from Chevron (and others, see
below) is blended with water from other surface and groundwater supplies to meet the
receiving water limitations set forth in this Order. Surface water blended into Reservoir B
consists of Kern River water, State Water Project, and Central Valley Project waters
delivered from the Beardsley Canal through Lerdo Pumping Station B. CWD is required to
manage the water through management practices and blending to ensure protection of
applicable beneficial uses. Through its use of its Distribution Canal, CWD discharges
excess blended water to Poso Creek (for intentional recharge of groundwater) during the
winter months when irrigation demand is low. Consequently, both Chevron and CWD are
entities that discharge to surface waters of the U.S. and are collectively responsible for
compliance with this Order.
In June 2007, the Regional Water Board adopted Order No. R5-2007-0066 (NPDES
Permit No. CA0081311) for Valley Waste Disposal Company (VWDC) and CWD. The
Order allows VWDC to discharge up to 7.4 mgd of treated produced water from the Kern
Front Oil Field to Reservoir B.
At times when Chevron is unable to discharge to Reservoir B (due to maintenance or
emergency reasons), treated produced water is discharged to the Carrier Canal. This
discharge is regulated by Order No. R5-2002-0052 (NPDES No. CA0080853) and Special
Order No. R5-2005-0136, which authorizes Chevron to discharge up to 18 mgd of treated
produced water to the Carrier Canal. In December 2006, Chevron submitted a RWD and
applied for a NPDES permit renewal to continue the contingency discharge to the Carrier
Canal. The application was deemed complete on 12 January 2007 and adoption of a new
Order is pending. |
| Annual budget | None |
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Basins & sub-basins monitored
- Tulare Lake (Tulare Lake)
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map
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Sites Monitored
| Name |
Code |
Latitude |
Longitude |
Map |
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Poso Creek, US of discharge 003, State Highway 65 gauging station
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RSW-001 |
35.551533 |
-119.087354 |
locate |
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Poso Creek, DS of discharge 003, 100 ft west of highway 99
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RSW-002 |
35.605969 |
-119.212364 |
locate |
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Parameters Monitored
| Group | Parameters | Frequency |
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| General Water Quality |
Alkalinity, Hardness, pH, Specific Conductance [EC @ 25 deg C], Temperature, Turbidity |
Monthly, Weekly |
| Hydrology |
Flow |
Daily |
| Major Ions & Minerals |
Boron, Calcium, Chloride, Magnesium, Potassium, Sodium |
Monthly, Weekly |
| Metals & Trace Elements |
Iron , Manganese |
Monthly |
| Nutrients |
Phosphorus |
Monthly |
| Priority Pollutants |
Priority Pollutants |
Annual |
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Data Products Available
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