PRELIMINARY DESIGN REPORT For the CHINO CREEK WELLFIELD WELLS I-19, I-20 AND I-21 Prepared for CHINO BASIN DESALTER AUTHORITY 2151 South Haven Avenue, Suite 202 Ontario, California 91761 And WESTERN MUNICIPAL WATER DISTRICT, (PROGRAM MANAGER) 14205 Meridian Parkway Riverside, California 92518 July 29, 2011 CONTENTS REFERENCES USED…………………………………………………………..………………………..….1 INTRODUCTION……………………………………………………………………………...………..…..4 Figure 1: Project Location………………………………………………………..……..….. 5 GEOHYDROLOGIC SETTING…………………………………………………………………….………6 Figure 2: Geologic Setting………………………………………………………………….. 7 EXPECTED SUBSURFACE CONDITIONS……………………………………………………….………8 Figure 3a: Lithologic Cross-Section…………………………………………………..………9 Figure 3b: Lithologic Cross-Section Map View……………………………..………………..9 ANTICIPATED PRODUCTION AND POTENTIAL IMPACT OF PROPOSED WELLS……………10 Figure 4: Well Site Considerations…………………………………………….…...............11 GROUND WATER QUALITY……………………………………………………………………………12 Table 1: Water Quality Summary of Existing CDA Wells…………………………..........13 Figure 5: Ground Water Chemistry of Chino Creek Area………………………………….15 REGULATORY CONSIDERATIONS…………………………………………………………………….16 Table 2: Required Permits and Governing Agencies……………………………………...17 WELL SITE CONSIDERATIONS…………………………………………………………………...……18 PROPOSED WELL SITE: I-19……………………………………………………………….....................18 Figure 6a: Proposed Well Site I-19………………………………………………………….19 PROPOSED WELL SITE: I-20…………………………………………………….…………………..…..20 Figure 6b: Proposed Well Site I-20…………………………………….……………………21 PROPOSED WELL SITE: I-21…………………………………………………………….………………22 Figure 6c: Proposed Well Site I-21…………………………………………….…………....23 PRELIMINARY WELL DESIGN……………………………………………………………………....…24 Table 3: Details of Preliminary Well Design………………………………………….......24 Figure 7: Preliminary Well Design……………………………………………….………...25 DRILLING APPROACH…………………………………………………………………………………..26 Figure 8: Drilling Approach…………………………………………………….…………..27 GEOPHYSICAL LOGS……………………………………………………………………………………28 Table 4: Geophysical Logs…………………………………………………….…………..29 AQUIFER ZONE TESTING………………………………………………………………….……………30 Figure 9a: Aquifer Zone Selection………………………………………….………….…….31 Figure 9b: Aquifer Zone Construction……………………………………….……………....31 WELL CONSTRUCTION……...…………………………………………….……………………………32 Figure 10: Well Construction……………………………….……………………………….33 WELL DEVELOPMENT………………………………………………………………………………….34 Table 5: Well Development……………………………………………………………….34 Figure 11: Well Development……………………………………………………………….35 TEST PUMPING AND TITLE 22 WATER QUALITY ANALYSES……………………………………36 Table 6: Title 22 Analytes…………………………………………………………………37 ENGINEER’S ESTIMATES……………………………………………………………………………….38 Table 7: Engineer’s Estimates……………………………………………………………..39 APPENDIX A Summary of Existing CDA Wells in the Chino Creek Area APPENDIX B Hydraulic Control Monitoring Well Water Level Graphs APPENDIX C Anticipated Filter Pack Design REFERENCES USED American Water Works Association, December 2007, Water Wells. AWWA A100-06. Black & Veatch, September 2008, Treatment Technologies Technical Memorandum, Metropolitan Dry-Year Yield Program Expansion Project, Prepared for the Chino Basin Watermaster. California Department of Public Health (CDPH), November 2008, Maximum Contaminant Levels and Regulatory Dates for Drinking Water U.S. EPA versus California. California Department of Water Resources (DWR), January 2006, California’s Groundwater: Upper Santa Ana Valley Groundwater Basin, Bulletin 118. California Department of Water Resources (DWR), 1998, Water Well Standards, Bulletins 74-81 and 74-90 Carollo Engineers, December 2010, Chino Desalter Phase 3 Comprehensive Predesign Report, Prepared for The City of Ontario, Jurupa Community Service District and Western Municipal Water District. Driscoll, F.G., 1986, Groundwater and Wells , Second Edition, St. Paul, Minnesota: Johnson Filtration Systems, Inc. Fetter, C.W., 1994, Applied Hydrogeology , Fourth Edition, New York: McMillan. Geoscience Support Service, Inc., January 2011, Letter: Chino Desalter Authority Well I-18 Recommended Casing, Screen and Filter Pack Design, Prepared for Western Municipal Water District. Geoscience Support Service, Inc., September 2009, Preliminary Design Report for the Chino Creek Wellfield and Chino II Expansion Wellfield Chino Desalter Phase 3 Project, Prepared for Western Municipal Water District. Geoscience Support Services, April 2005, Results of Drilling, Construction, Development and Testing of Chino I Expansion and Chino II Desalter Wells, Prepared for RPF Consulting and the Chino Basin Desalter Authority. Kelly, W.E, & Mares, S. (editors). 1993. Applied Geophysics in Hydrogeological Engineering Practice in Developments in Water Science. p.262-264. Kennedy/Jenks Consultants, 2008, Integrated Regional Water Management Plan 2008 Update. Prepared for Western Municipal Water District. Keys, W. Scott, 1990. Techniques of Water-Resource Investigation of the United States Geological Survey: Chapter E2 Borehole Geophysics Applied to Ground-Water Investigations. Metropolitan Water District of Southern California (MWD), September 2007, Groundwater Assessment Study, Report Number 1308. Roscoe Moss Company, 1990, Handbook of Ground Water Development , New York: John Wiley & Sons TetraTech, February 2011, TCE Plume Characterization and Monitoring Well Installation Report, Chino Airport Groundwater Assessment, San Bernardino County, California, Prepared for County of San Bernardino. 1 <Blank> 2 United States Environmental Protection Agency, November 2009, Region IX Drinking Water Standards and Health Advisories Table. United States Environmental Protection Agency, June 2001, Fact Sheet: Correcting Henry’s Law Constant for Soil Temperature. United States Geological Survey, 1990, Techniques of Water-Resources Investigations of the United States Geological Survey , Chapter E2: Borehole Geophysics Applied to Ground-water Investigations by W.S. Keys. United States Geological Survey, 1966, 7.5-minute topographic map: Corona North, California. United States Geological Survey, 1966, 7.5-minute topographic map: Guasti, California. United States Geological Survey, 1966, 7.5-minute topographic map: Prado Dam, California. United States Geological Survey, 1966, 7.5-minute topographic map: Ontario, California. United States Geological Survey, 2006, Geologic Map of the San Bernardino and Santa Ana 30’ x 60’ Quadrangles, California. Wildermuth Synergies, LLC, 2009-2011, HydroDaVE Explorer: Compilation of Chino Basin Water Master data and information for public wells in the Chino Creek area. Wildermuth Environmental, Inc., November 2009, Chino Basin Optimum Basin Management Plan, 2008 State of the Basin Report, Prepared for the Chino Basin Watermaster. Wildermuth Environmental, Inc., 2007, Chino Basin Water Master Ground Water Model Documentation and Evaluation of the Peace II Project Description, Prepared for the Chino Basin Watermaster. Wildermuth Environmental, Inc., April 15, 2006, Chino Basin Maximum Benefit Monitoring Program Annual Report, Prepared for Chino Basin Watermaster and Inland Empire Utilities Agency. Wildermuth Environmental, Inc., September 2003, Optimum Basin Management Program Technical Memo Prepared for Chino Basin Watermaster. Wildermuth Environmental, Inc., August 1999, Optimum Basin Management Program Draft Phase I Report, Prepared for Chino Basin Watermaster . Yeats, R.S., Final Technical Report: The Chino Fault and its Relation to Slip on the Elsinore and Whittier Faults and Blind Thrusts in Puente Hills. 3 INTRODUCTION Figure 1: Project Location The Phase 3 Chino Desalter expansion project is being sponsored by Jurupa Community Services District, the City of Ontario and the Western Municipal Water District on behalf of the Chino Basin Desalter Authority. Western Municipal Water District (Western) acts as the Program Manager for the project. The objectives of which are to (1) provide additional capacity of 10 million gallons per day of product water; and (2) achieve hydraulic control of the Chino Basin ground water to minimize discharge of poor quality waters to the Santa Ana River in accordance with the Peace II Agreement. To help achieve these objectives, six new wells were proposed as part of the Chino Creek Well Field (Carollo, 2010). Combined production of raw ground water from these six wells was projected to be between 5,000 and 7,700 acre-feet per year (Carollo, 2007). This translates to roughly 515 to 795 gallons per minute (gpm) of continuous pumping per well. Three of these wells have already begun construction and have been described in a previous design report (Geoscience, 2009). In March 2011, Western authorized GSi/water to provide construction management services for three of the new Chino Creek Wells: I-19, I-20 and I-21 (Figure 1). The proposed sites for these wells are just north of Kimball Avenue along a ¾ -mi stretch between Euclid and Grove Avenues. Our objective is three-fold with a scope of work that includes: I. Provide preconstruction assistance: a. Extensive information review including an evaluation of data from existing wells (construction, production, water levels and water quality); b. Field reconnaissance of the proposed well sites and surrounding areas; c. Discuss potential issues with representatives from the Chino Basin Watermaster, City of Chino, Santa Ana Regional Water Quality Control Board, and the Sponsor Group for the Chino Desalter Authority; d. Prepare technical well specifications and final bidding documents; e. Prepare Preliminary Drinking Water Source Assessment and