ࡱ> ` )bjbjss Bp!!4 4 4 4  d+d+d+8+\+ ZH,,,,,xHxHxHYYYYYYY$^[h]Y NBtHNNY4 4 ,,YRRRN4 , l,YRNYRRT| @ ,yU,, PØd+^O UUVY0ZgU^jP^$yU^ yUxHJR"KLxHxHxHYY QxHxHxHZNNNN d+ d+ 4 4 4 4 4 4  OFFICE NO: 8 INSPECTOR: NNA PCA SYSTEM TASK NO.: 126  8 362542001 MWD OF SOUTHERN CALIFORNIA Inland Feeder Project WDS No. NAME OF AGENCY OR PARTY RESPONSIBLE FOR DISCHARGE NAME OF FACILITY 04-48 P. O. BOX 54153 Various WDR Ord No. AGENCY STREET ADDRESS FACILITY STREET  01 23 08 B1 LOS ANGELES, CA 90054-0153 Various  MM DD YY TYPE AGENCY STREET ADDRESS FACILITY CITY & STATE 01 23 08 GEORGE MUSE GEORGE MUSE Actual Inspection AGENCY CONTACT FACILITY CONTACT Date (YYDDMM)  (213) 217-6287 (213) 217-6287 AGENCY PHONE NO. FACILITY PHONE NO. S Inspection Agency (S=STATE, J=JOINT STATE/USEPA)   N If this inspection is a compliance inspection on an NPDES facility, send a copy of this report to SWRCBs Division of Water Quality, Program Support Unit INSPECTION TYPE (Check One) A1 A type compliance--Comprehensive inspection in which samples are taken. (EPA Type S) B1 X B type compliance--A routine nonsampling inspection. (EPA Type C) 02 Noncompliance follow-up--Inspection made to verify correction of a previously identified violation. 03 Enforcement follow-up--Inspection made to verify that conditions of an enforcement action are being met. 04 Complaint--Inspection made in response to a complaint. 05 Pre-requirement--Inspection made to gather info. relative to preparing, modifying, or rescinding requirements. 06 Miscellaneous--Any inspection type not mentioned above. If this is an EPA inspection not mentioned above please note type. (e.g. biomonitoring, performance audit, diagnostic, etc.)  Y Were violations noted during this inspection? (Yes/No/Pending Sample Results)  N Was this a Quality Assurance-Based inspection?  N Were bioassay samples taken? (N=no) If YES then, S= Static or F= Flow through. INSPECTION SUMMARY (REQUIRED) (100-character limit) Various discharge points of the Inland Feeder Project have been inspected revealing that MWD is in compliance with its Order No. R8-2004-0048. INITIALS: NNA SIGNATURE: DATE: April 23, 2007 For Internal Use: Reviewed by: (1) (2) (3) Regional WDS Coordinator WDS Data Entry Date: -- -- Regional Board File Number:  VIOLATION (IF APPLICABLE) VIOLATION TYPE? (A-G) (See Pages IK05.0 and IK05.1 of the Micro Waste Discharger System Users Manual) DATE OF VIOLATION (YYMMDD): NA  DATE OF VIOLATION DETERMINATION (YYMMDD): DESCRIPTION OF VIOLATION (200 Character Limit): EMWD is in violation of Order #98-67 for exceeding pH limits at both ends of the acceptable range. EPA SUGGESTED INSPECTION CHECKLIST SatisfactoryMarginalUnsatisfactoryNot EvaluatedPermitXFlow MeasurementXPretreatmentXOperations and MaintenanceXRecords/ReportsXLaboratoriesXCompliance SchedulesXSludge DisposalXFacility Site ReviewXEffluent/Receiving WatersXSelf-MonitoringX Overall Facility Operation Evaluation  (5=Very Reliable; 3=Satisfactory; 1=Unrelaiable): 3 HISTORICAL INFORMATION: MOST RECENT: Order No.Adopted DateTypeDateInspection TypeViolationsViolation TypeDate04-4804/09/99NPDES01/23/08B1 N ADDITIONAL COMMENTS, SPECIAL INSTRUCTIONS, ITEMS FOR FOLLOWUP ON FUTURE INSPECTIONS, NOTES, ETC. (On following pages, if necessary) SEE ATTACHED INSPECTION NOTES. ADDITIONAL INFORMATION Report Date: April 23, 2007 Location & County: MWD of Southern California/ Inland Feeder Project Contact(s): George Muse, Associate Engineer Inspection Date: January 23, 2008 Inspected By: Najah N. Amin Site(s): Inland Feeder Project On January 23, 2008 I visited a few locations of the Inland Feeder project of the Metropolitan Water District (MWD) to inspect and verify the discharge compliance with Order No. R8-2004-0048. Arrowhead Tunnels: The Arrowhead East Tunnel and the Arrowhead West Tunnel have been combined into one project named Arrowhead Tunnels. Specific information on the project is as follows: Length of Arrowhead West Tunnel (Waterman): 19,884 feet Length of Arrowhead East Tunnel (Strawberry): 30,466 feet Length of previously mined East Tunnel: 8,008 feet Construction began on the Arrowhead East Tunnel in 1997, but was suspended in 1999. Both tunnels have been redesigned to incorporate a state-of-the-art drilling technique that will reduce the potential environmental impacts to the San Bernardino Mountains. Groundwater from the Arrowhead West Tunnel is stored in water tanks for use at the construction site and is also being discharged to West Twin Creek at a rate of 28,800 gallons per day (gpd). Waterman Canyon Portal: Approximately 15,600 linear feet of primary segmental liner has been placed. Total tunnel as of December 31, 2007 is 78% complete. Strawberry Creek Portal, approximately 21,330 linear feet (4,265 rings) have been excavated and primary segmental liner installed from Strawberry Creek Portal. Total tunnel including 8,008 feet from City Creek portal as of December 31, 2007 is 96% complete. Key Activities (City Creek Portal) : There has been installation of temporary utilities inside the existing 8,000 foot City Creek Tunnel. This is part of the Arrowhead East Tunnel that joins with Strawberry Creek Portal tunneling operations. MWD constructed a new temporary wastewater treatment plant located on the City Creek Muck Disposal site. This plant will be very efficient in treating wastewater produced by drilling operations. Waterman Wastewater Treatment Plant: The wastewater treatment plant at this facility was constructed to treat 5,000 gallons/minute of wastewater. The current capacity is 3,750 gallons /min. The wastewater from construction activities at Strawberry Tunnel and Waterman Tunnel enters a flocculation tank where CO2 gas is injected into the tank for precipitation of solids and to control pH. Wastewater from the flocculation tank is pumped to a clarifier where solids settle and then is withdrawn to two drying beds for drying and later is hauled to a landfill. The wastewater from the clarifier is pumped to two unlined ponds for more settling. Approximately 100-150 gallons of this water is pumped to a Reverse Osmosis System (RO) for TDS removal. The RO unit runs continuously and it runs at a pH range of 9-11; inlet conductivity is 472 (s with discharge conductivity at 200-224 (s. Due to reduction of TDS in the flocculation tank, the permeate water from the RO units is combined with wastewater from the pond in the blending tank. The blending ratio is 100-150 gallons RO permeate/ 300 gallons of pond water. The blended wastewater is then discharged to East Twin Creek. The rejected wastewater from RO units is returned to the flocculation tank for further treatment. The TDS objective concentration in the upper inland area is 290 mg/L. The tunneling operation is generating high TDS of 680 mg/L and by CO2 injection they were able to bring TDS levels below 290 mg/L. There were occasional incidents that the TDS levels exceeded 290 mg/L. Summary: The Arrowhead Tunnel Project is a very big project and there are many points of discharge. The discharge points are at various locations and each discharge point is tributary to different reaches. Due to MWD Inland Feeders activities, MWD is required to offset the TDS. The new offset plan involves the use of two wells that will be operated by San Bernardino Valley Municipal Water District. All of the water extracted from the wells will be transferred to and used by the City of Riverside for agricultural purposes. This arrangement offsets come of the excessive TDS of the Inland Feeder Project. Meanwhile they were able to reduce TDS levels in their treatment plant and decrease their impact of TDS loading in the upper basin. Review of SMRs indicates they are meeting the discharge requirements.   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