22345 La Palma Ave. Unit 106. Yorba Linda CA 92887 Ph: 866-416-4214 Fx: 866-416-4214 License# 359728

Contractor List of References & Experience Customer Design Engineer Completed Job # & Job Description Cont. Amt

Moulton Niguel Water District K.I.M. Consulting Engineers Dec-90 Country Village Pump Station $ 659,000 Attn: Carlo Habash Attn: Ken Mullen Ph. (949) 643-2584 #219 Chino Basin Municipal W.D. Brown & Caldwell Feb-92 Pardo Dam Dechlorination Facil. $ 492,753 Attn: Ken Peterson Attn: Doug Robinson Ph. (916) 445-8870 Ph. (949) 660-1070 #435 Santa Margarita Water District RBF Consulting Engineers Feb-92 Nichols Institute Effluent Pump Stn $ 358,412 Attn: Dan Ferons Attn: Paul Kline Ph. (949) 459-6589 Ph. (949) 855-3646 #226 Serrano Irrigation District Daniel Boyle Engineering Oct-91 Construction of Well No. 4 $ 243,373 Attn: Gary Althide Attn: Doug Biglen Ph. (714) 538-0079 Ph. (949) 768-2600 #232 El Toro Water District Steven Andrews Engineering Aug-93 Construction of P-1 Pump St. $ 832,389 Attn: Dennis Cafferty Attn: Steven Andrews Ph. (949) 837-7050 Ph. (714) 935-9844 #233 San Bernardino Valley M.W.D. K.I.M. Consulting Engineers Jul-92 Surge Protection Arrestor $ 126,031 Attn: Louis Fletcher Attn: Ken Mullen Ph. (909) 387-9226 #234 Cal-American Water Co. ASL Consulting Engineers Las Lomas & Encanto Well $ 568,732 Attn: Scott Leadsman Attn: Jerry Elliot Jan-93 Ph. (818) 289-7821 Ph. (949) 727-7099 #235 West Basin Municipal W.D. Don Howard Engineers Mar-93 Desalinization Project $ 463,533 Attn: Linda Palmquist Attn: Don Howard Ph. (310) 217-2411 Ph. (626) 331-3341 Replace Sewer Laterals U.S. Army/Ft. Irwin Ft. Irwin Army Base Feb-93 Replace Water Laterals $ 1,216,997 Attn: Mark Livingston Attn: Mark Livingston Upgrade HVAC at Bldg. #254 Ph. (619) 396-3892 Ph. (619) 396-3892 Upgrade HVAC at Bldg. #326

City of Laguna Beach City of Laguna Beach Dec-93 Bluebird Cyn. & Laguna Beach $ 170,153 Attn: Ross Cox Attn: Ross Cox Pump Station VFD's Ph. (949) 497-3311 Ph. (949) 497-3311 #250 Eastern Municipal Water District Eastern Municipal W.D. Aug-93 Clark Street Lift Station $ 175,462 Attn: Bob Van Doren Attn: Bob Van Doren Ph. (909) 766-1831 Ph. (909) 766-1831

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Contractor List of References & Experience (Page 2) Customer Design Engineer Completed Job # & Job Description Cont. Amt #248 Santa Margarita Water District RBF & Associates Sep-93 Prima Deshecha Pump Station $ 109,962 Attn: Dan Ferons Attn: Michael W. Palzes, P.E. Ph. (949) 459-6589 Ph. (949) 472-3505 #249 City of Anaheim City of Anaheim Mar-94 Well No 49 Improvements & $ 428,537 Attn: Isaac Pai Attn: Isaac Pai Site Modfications Ph. (916) 445-8870 Ph. (714) 254-5176 #435 Moulton Niguel Water District ASL Consulting Engineers Mar-94 Master Meter Vault Upgrade $ 148,119 Attn: Carlo Habash Attn: Steve Tedesco Ph. (949) 643-2584 Ph. (949) 727-7099 #252 L.A. County Public Works L.A County Public Works May-94 Ave. K/34th St. Booster Pump Stn $ 267,955 Attn: Nelson Attn: Nelson

City of Compton City of Compton May-94 #253 $ 107,136 Attn: Leonard Carter Attn: Leonard Carter Vault Rehab. Project Ph. (310) 605-5595 Ph. (310) 605-5595 #255 Southern Cal. Water Co. Southern Cal. Water Co. Mar-95 Calle Linda Booster Station $ 152,166 Attn: Chet Anderson Attn: Chet Anderson Ph. (909) 592-2964 Ph. (909) 592-2964 Turner Construction Co. L.B.L., Inc. #256 Orange County Offices 2890 Colorado Ave. Kaiser Riverside, Medical Center $ 583,227 Attn: Bill McLaughlin S.M., Ca. 90404 Jun-95 General Conditions Misc. Site Ph. (949) 798-8100 Ph. (310) 829-2249 Concrete and Utilities #260 Moulton Niguel Water District I.W.A. Engineers Apr-95 Wood Canyon Pump Station $ 1,125,012 Attn: Ray McDowell Attn: Mark Bogh Ph. (949) 798-8100 Ph. (310) 829-2249 Concrete and Utilities #262 City of Anaheim Anaheim Arena Sep-95 Storm Drain Pump Station $ 28,595 Attn: Building/Permits Attn: Mike O'Donnel Ph. (714) 254-5176 Ph. (714) 704-2402 #263 Rowland Water Distict ASL Consulting Engrs. Jun-95 MacHeard Booster St. $ 372,496 Attn: Tony Poli Attn: Terry Kerger Ph. (562) 697-1726 Ph. (949) 727-7099 #264 Kaiser Construction Services Kaiser Facilities Design Dec-95 Cooling Tower Modifications $ 27,230 Attn: Mark Montgomery and Construction Ph. (909) 353-3096 Ph. (909) 427-5016

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Contractor List of References & Experience (Page 3) Customer Design Engineer Completed Job # & Description Cont. Amt City of Chino Hills #265 City of Chino Hills Attn: Director of Utilities May-95 Butterfield Sewage Lift Station $ 27,990 Attn: Ms. Zora Lee Terry Kimbro Ph. (909) 597-1784 Ph. (909) 597-1784 #266 General Pump City of Santa Monica Jul-95 Santa Monica Well Projects $ 102,184 Attn: John Hodges Attn: Bob Harvey Ph. (916) 445-8870 Ph. (310) 826-6712 #435 American Water Works Svc. ASL Consulting Engineers Jan-96 Danford Booster Pump #1 $ 122,850 Attn: Linda Dossman Attn: Richard L Bardin Ph. (619) 656-2400 Ph. (949) 727-7099 #273 Rancho Water District Krieger & Stewart Inc. Jun-96 CA Oaks Swg Lift Station #1 & #2 $ 578,670 Attn: Craig Mapes Attn: Jon Clyde Reynolds Mods 5 & 6 Ph. (909) 676-4101 Ph. (909) 684-6900 #274 City of Upland John Egan & Associates Jan-96 15th Street Transfer Station $ 198,346 Attn: Jim Moody Attn: John Egan (Portable Water:CIP Structure & Ph. (909) 931-4245 Ph. (909) 889-0676 Booster Station) #276 Southern Ca. Water Co. So. Water Co. Jan-96 Install sand trap and piping for Well #4 $ 46,179 Attn: Chet Anderson, P.E. Attn: Chet Anderson, P.E. Ph. (909) 394-3648 Ph. (909) 394-3648 #277 La Habra Heights ASL Consulting Engineers Plant #1 Surge Tank and Wet Well $ 144,698 Attn: Jim Frei Attn: Steve Ochsner May-96 Rehab. Ph. (949) 727-7099 #278 Kaiser Health Foundation Mollenhauer, Higashi Jan-96 Corona Reginal Data Ctr. $ 43,227 Attn: Mark Hutchins Site Drainage Improvement Ph. (909) 353-3977 #279 Big Bear Municipal Water District Montgomery Watson Dec-95 Dam Gate Rehab. $ 36,843 Attn: Jim Weber Attn: Cheuk H. Lee Ph. (909) 866-5796 Ph. (626) 796-9141 #281 Moulton Niguel Water District ASL Consulting Engineers May-97 Crown Point Pump Station $ 278,879 Attn: Carlo Habash Attn: Steve Tedesco Conversion to Reclaimed Water Ph. (949) 643-2584 Ph. (949) 727-7099 Pump Station #282 El Toro Water District Dames & Moore Jan-97 Reservoir $ 140,606 Attn: Dennis P. Cafferty Flexible Couplings & Corrosion Repairs Ph. (949) 837-7050 Ph. (714) 433-7600

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Contractor List of References & Experience (Page 4) Customer Design Engineer Completed Job# & Description Cont. Amt #280 Turner Construction Flour Daniel Engineering Mar-97 Procetor & Gamble, Sundor Brands $ 274,998 Attn: Bill McLaughlin Anaheim Plant Expansion Ph. (949) 798-8100 Ph. (949) 349-2135 #284 Swinerton & Walberg Jenkins/Gales & Martinez May-96 Remote Aircraft LAX Boarding Facilities; $ 168,216 Attn: Dan Larson 12" Water & 8" Sewer Ph. (916) 445-8870 #435 Black & Veatch Black & Veatch Jun-96 Edwards Airforce Base $ 27,349 Attn: Sam Abi Samra Attn: Connie Leonard 20" Pipeline Testing & Maintenance Ph. (213) 312-3300 Ph. (213) 312-3300 #286 Irvine Ranch Water District Irvine Ranch Water District Oct-96 Michelson Water Reclamation Plant $ 353,400 Attn: Malcolm Cortez Attn: Malcolm Cortez Concrete Modification & Repairs Ph. (949) 453-4500 Ph. (949) 453-4500 to spent Backwash Tank #287 BCI, Inc. Sidawi & Associaates, Inc. Jun-97 Freeman Reservoir Pump Station $ 296,800 Attn: George King Attn; Zac Sidawi 27330 Calle Escadera, Temecula Ph. (562) 630-1707 Ph. (714) 966-1416 #288 Bonadiman McCain Bonadiman McCain Aug-96 Emergency Repair @ Glen Helen $ 2,866 Attn. Carlo Bonadiman Attn. Carlo Bonadiman Regional Park Ph. (909) 885-3435 Ph. (909) 885-3435 2555 Devore Rd., San Bernardino #289 Turner Construction Co. The Irvine Co. Curtain Wall Replacement $ 54,057 Attn: Bob Brann Dec-97 620 Newport Drive Ph. (949) 798-8100 Misc. Labor Rough Carp. & Ste. Wk. #290 Turner Construction Co. Microcenter Computer Store Oct-96 Repairs to 6" Fire Serv. & Site Work $ 8,266 Attn: Bob Brann Mike Withers Ph. (949) 798-8100 Ph. (714) 566-8527 #291 Turner Construction Co. Widom Wein Cohen Jan-97 Seismic Ugrades $ 195,196 Attn: Ed. Cunningham Kaiser Regional Data Center Ph. (949) 798-8100 Structural Concrete #293 Turner Construction Co. HOK Sports Facilities Mar-97 Anaheim Stadium Renovation $ 200,276 Attn: Bob Berenguner Attn: Bob Berenguner Seating & Misc. Labor Ph. (949) 798-8100 Ph: (714) 978-7576 #294 Santa Margarita Water District Boyle Engineering Co. May-98 South Ranch Lift Station $ 933,538 Attn: Bart Lantz Attn: Kent Gingrich Project No. 50 Contract C-1656 Ph. (949) 459-6583 Ph. (949) 476-3310

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Contractor List of References & Experience (Page 5) Customer Design Engineer Completed Job# & Description Cont. Amt #296 Turner Construction Co. Enrlich - Rominger Sep-97 Bio-Rad Laboratories $ 191,500 Attn: Brian Brown Attn: Gary Hipolite Site Concrete Ph. (949) 798-8100 Ph. (714) 476-4000 #298 Valley Crest Landscaping, Inc. HOK Sports/Turner Mar-98 Anaheim Stadium Renovation $ 827,406 Attn: John Viera Attn: Bob Berenguner Architectural Site Concrete Ph. (714) 546-7975 Ph. (949) 798-8100 #435 Turner Construction Co. WDI/Turner Mar-98 Anaheim Stadium Renovation $ 98,311 Attn: Pat Garret Attn: Steve Scarsborough Temp Ticket Bldg. Ph. (949) 798-8100 Ph. (714) 978-7576 #300 Turner Construction Co HOK Sports Mar-98 Anaheim Stadium Renovation $ 167,218 Attn: Paul Morrissey Pat Tangen Site Utilities Ph. (916) 445-8870 Ph. (714) 978-7576 #303 Turner Construction Co HOK Sports Mar-98 Anaheim Stadium Renovation $ 206,174 Attn: Jamie Kramer Pat Tangen Ornamental Steel Fence/Gates Ph. (949) 798-8100 Ph. (714) 978-7576 #304 Turner Construction Co. HOK Sports Mar-98 Anaheim Stadium Renovation $ 103,584 Attn: Don Heller Attn: Daryl Redden Pigmented Concrete Diamond/ Ph. (949) 798-8100 Ph. (714) 978-7576 Stadium Club #305 So. California Water Co So California Water Co. Chapman Plant Modifications $ 229,188 Attn: John Tracy Lyon Attn: Joe Minneci Jun-98 Ph. (714) 535-8010 Ph. (909) 394-3648 #308 Los Alisos Water District Boyle Engineering Jun-98 Wellhead Facilities & Site $ 230,581 Attn: Paul Cook Attn: Kent Gingrich Improvements Well #5 Ph. (949) 239-2920 Ph. (949) 476-3300 #309 EL Yeager Const Co. Boyle Engineerinf Jul-98 West Street Disneyland Drive 193,062 Attn: Jacques Yeager Attn: Russ Hulse Segments 1 & 2 Ph. (909) 684-5360 Ph. (949) 476-3300 Storm Water Pump Station #313 City of Whittier City of Whittier Dec-98 Installation of Booster 4 & 5 $ 321,389 Attn: David Schickling Attn: David Schickling Construction of New Booster Pump Ph. (562) 695-5214 Ph. (562) 695-5214 Facilities #314 Irvine Ranch Water District Irvine Ranch Water District Nov-98 Bayview Lift Station Emergency $ 315,000 Attn: Ants Uiga, P.E. Attn: Ants Uiga, P.E Generator; New Standby Emergency Ph. (949) 453-5586 Ph. (949) 453-5586 Generator Facility

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Contractor List of References & Experience (Page 6) Customer Design Engineer Completed Job # & Description Cont. Amt. Elsinore Valley Municipal Water Dst. #316 Attn: Loren Sorber Daniel Boyle Engineering Dec-98 Canyon Lake Treatment Plant $ 380,200 Ph. (909) 674-3146 Attn: Doug Biglen Intake Facility; Earthwork, Pipe Utility Ph. (949) 768-2600 Concrete, and Mechanical R B & G Construction #317 Attn: Roger May Daniel Boyle Engineering Jan-99 Well No. 19 U/G Concrete Struct. $ 233,626 Ph. (916) 445-8870 Attn: Brian Powell for future Well Pump Facility Ph. (949) 768-2600 City of Los Angeles City of Los Angeles #435 Attn: Ben Abdian Attn: Ben Abdian Jun-99 Emergency On-Call Sewer Repair $ 197,873 Ph. (213) 847-5124 Ph. (213) 847-5124 Temple Street Area Emergency Repr E.L. Yeager Construction Corp. Mojave Water Agency #320 Attn: Gary Baxter Attn: Gary Martin Mar-99 Mojave River Pipeline Lenwood Proj $ 99,533 Ph. (800) 222-5360 Ph. (760) 240-2080 Kaiser Facilities Widom, Wein, Cohen, Olea #321 Attn: Raymon F Felton Mar-99 CDC-Modular Building $ 261,403 Ph. (909) 278-0990 City of Westminister Daniel Boyle Engineering #325 Attn: Marwan Youssef Attn: Douglas K.Biglan Jul-99 Equipping Bolsa Chica Park Well $ 397,203 Ph. (714) 898-3311 Ph. (949) 768-2600 EVMWD DGA Consultants #326 Attn: Phillip Miller Attn: Repair & Rehabilitations $ 139,178 Ph. (909) 674-3146 Ph. (714) 568-0200 Feb-00 SL Stations B1 & B2 Moulton Niguel Water District ASL Consulting #327 Attn: Ray McDowell Attn: Tom Epperson Dec-00 Regional Sewage Lift Station $ 157,795 Ph. (949) 425-3532 Ph. (949) 727-7099 A.O. Reed & Company Bechard Associates #328 Attn: Tom Schordorf Attn: Bruce Bechard Sep-00 Cal-Poly Pomona $ 133,393 Ph. (858) 565-4131 Ph. (858) 578-8861 Chilled Water Central Plant #331 Security Paving HNTB Corporation Jul-01 Johnson Drive $ 210,859 Attn: Marty Pettee Attn: Michael Jones Railroad Grade Separation Ph. (805) 986-1953 #332 Port of Long Beach Moffatt & Nichol Aug-00 Carrack Avenue $ 292,534 Attn: Jim Crump Attn: Lloyd Jenkins Storm Water Pump Station Ph. (562) 437-0041 Ph. (562) 426-9551 #334 Buie Communities PBS&J Apr-00 Zone 6 Booster Pump Station $ 578,196 Attn: Robert Montgomery Attn: Terry Watson Ph. (916) 445-8870 Ph. (909) 341-6380 #338 Moulton Nigel Water District ASL Consulting Dec-00 No. Aliso Creek Lift Station $ 311,992 Attn: Ray McDowell Attn: Tom Epperson Ph. (949) 425-3532 Ph. (949) 727-7099

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Contractor List of References & Experience (Page 7) Customer Design Engineer Completed Job# & Description Cont. Amt. #339 City of Chino City of Chino, DPW Apr-00 Citywide Drainage Improvements $ 110,630 Attn: James Hill Attn: James Hill Ph. (909) 627-7577 Ph. (909) 627-7577 #341 El Toro Water District Daniel Boyle Engineering Dec-00 12" Freeway Forcemain & Pump $ 737,937 Attn: Dennis Cafferty Attn: Vernon Weisman Station Rehab. Ph. (949) 837-7050. Rcy 223 Ph. (949) 476-3300 #435 City of Los Angeles City of Los Angeles Apr-00 Emergency Storm Drain Repair $ 82,052 Attn: Lynn Hanami-Cummings Attn: Lynn Hanami-Cummings Normandie & Torrance Ph. (310) 732-4693 Ph. (310) 732-4693 #343 County of LA Dept of Parks & Rec KDG in Assoc. w/ Wm. Yang Sep-01 Pathfinder Community Regional Park $ 180,117 Attn: Patrick Reynolds Attn: Irrigation Booster Pump Station Ph. (213) 738-2865 Ph. (213) 381-3311 #344 County of Orange County of Orange Jul-00 Repair of Sewage Pump System $ 23,450 Attn: Robert J. Witting Attn: Robert J. Witting Laguna Niguel Regional Park Ph. (714) 567-6300 Ph. (714) 567-6300 #348 City of Los Angeles City of Los Angeles Dec-00 Emergency Storm Drain Repair $ 30,208 Attn: Azadeh Abrishami Attn: Azadeh Abrishami Stone Canyon Ph. (310) 575-8651 Ph. (310) 575-8651 #349 Fieldstone Harlan Hills LLC Hunsaker & Associates Harlan Hills Booster Pump Station $ 481,922 Attn: Bruce Lewis Attn: Jim Smith Aug-01 Ph. (949) 640-9090 Ph. (949) 583-1010 City of Los Angeles #350 Miron Electric Construction Corp Environ. Engineering Feb-02 Venice Pumping Plant Automation $ 579,833 Attn: Ron Kaufman Attn: Vali Noor Ph. (818) 772-9494 Ph. (310) 648-6129 #351 Moulton Niguel Water District ASL Consulting Jun-01 Little Niguel Flow Control Facility $ 139,450 Attn: Ray McDowell Attn: Tom Epperson Ph. (949) 425-3532 Ph. (949) 727-7099 #352 A.O. Reed & Company Bechard Associates Wet Site Utilities, Water, Sewer, & $ 12,841 Attn: Tom Schordorf Attn: Bruce Bechard Dec-00 Storm Drain: New Parking Structure Ph. (916) 445-8870 Ph. (858) 578-8861 #353 Excel Paving Company kpff Consulting Engineers Aug-01 Pier T Marine Terminal Pump Station $ 599,350 Attn: Randy Mason Attn: Todd Graham Ph. (562) 599-5841 Ph. (562) 435-1077, ext 252

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Contractor List of References & Experience (Page 8) Customer Design Engineer Completed Job# & Description Cont. Amt. #354 City of Corona KSI Consulting Enginners Jul-03 Water Well No. 12 Building (ONLY) $75,000 Attn: Eric Schoenen Ph. (951) 279-3675 Ph. (714) 282-8770 #355 City of Corona KSI Consulting Engineers Jul-03 Water Well No. 12 Building (ONLY) $75,000 Attn: Eric Schoenen Ph. (951) 279-3675 Ph. (714) 282-8770 #435 CAL-CITY Construction, Inc. LACDPW Sep-01 Puddingstone Diversion Dam $ 57,431 Attn: Young Lee Attn: Ricardo Gordillo Ph. (562) 630-7733 Ph. (626) 458-3142 #357 FCI Constructors, Inc. Caltrans May-02 Detention Basin @ Wiley Court $ 83,347 Attn: Dale Nelson Attn: Ph. (909) 482-0731 Ph. #358 NAVFAC: MCAGCC Sep-02 Non-Pot Supply Well $ 540,091 Attn: Rex L. Hughes Attn: Rex L. Hughes Ph. (760) 830-7434 Ph. (760) 830-7434 #359 John Laing Homes, Inc. Hunsaker & Associates Apr-03 Forster Ranch Lift Station $ 829,232 Attn: Ken Hauck Attn: James Maeding Ph. (949) 369-9983 Ph. (949) 458-5448 #360 City of El Segundo AKM Consulting Engineer Rehabilitation of Sanitary Sewer $ 301,667 Attn: Maryam Jonas Attn: John Logue Sep-02 Pump Station No. 6 Ph. (310) 524-2361 Ph. (949) 753-7333 #361 City of Culver City DMR Team Jun-02 PS Installation & Facilities Upgrade $ 347,496 Attn: David Shissler Attn: Shin Furukawa Project P-521 Ph. (310) 253-5600 Ph. (310) 338-3440 City of Newport Beach #362 3300 Newport Blvd. The Keith Companies Dec-03 Buck Gully, Linda Isle, & Carnation $806,372 Newport Beach, CA 92663 Attn: Robert F. Seeman Pump Station Rehabilitation Ph. (949) 644-3342 Attn:Michael Sinacori Ph. (714) 540-0800 Dept of Parks & Recreation State of CA #363 1416 9th Street Dept of Parks & Recreation Apr-03 CA State Dept of Parks & Recreation $203,633 Sacramento, CA 95814 Attn: Robert E. Robinson Water Treatment Mods Ph. (916) 445-8870 Janis Stanton Ph. (619) 220-5300 Irvine Ranch Water District #364 15500 Sand Canyon Ave. Tetra Tech Dec-03 Tustin Zone 5 Booster Station $1,537,494 Irvine, CA 92618 Attn: Tom Epperson Ph. (949) 453-5540 Jeff Staneart Ph. (949) 727-7099

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Contractor List of References & Experience (Page 9) Customer Design Engineer Completed Job Description Cont. Amt. Capital Pacific Homes #365 200 South Main Street Hunsaker & Assoc. Oct-03 Kraft Ranch Pump Station $861,502 Corona, CA 92882-3238 Attn: Jim Smith / John Gass City of Corona, Tract No. 28999 Ph: 951-644-3342 Mark Mullins Ph. (949) 888-8597 City of Corona #366 815 West Sixth Street HDR Consulting Engineers Nov-03 Joy Street Sewage Lift Station $673,864 Corona, CA 92882-3238 Ph. (951) 736-2477 Jonathan Daly Santa Margarita Water District #435 26111 Antonio Parkway Water Three Engineering Dec-03 Oso Creek WRP $578,309 Los Flores, CA 92688 Attn:Tricia Butler Sodium Hypchlorite Facility Ph.(949) 459-6504 Bart Lantz Ph. (949) 888-8597 Ryan Companies #369 50 South Tenth Street, Suite 300 N/A Sep-03 Target Distribution Centers $377,617 Minneapolis, MN 55403-2012 Attn: Ph: (612) 490-0549 Anthony Johnson Ph. John Laing Homes, Inc. #373 501 S. Anaheim Boulevard AKM Consulting Engineers Sep-04 Adolfo Lopez Sewage Lift Stn $754,261 Anaheim, CA 92803 Attn: John Loague, PE Ph. (562) 431-6269 Vince McLean Ph. (949) 753-7333 City of San Clemente RBF Consulting Engineers / #374 380 Avenida Pico, Bldg. N AKM Consulting Engineers Dec-06 Calle Agua / Schlege $2,202,929 San Clemente, CA 92672 Attn: Greg Deist Booster Pumping Stations (949) 361-6154: Greg Deist San Clemente Const Mgr. City of Huntington Beach #376 2000 Main Street C.M.: Harris & Assoc. Water Well No. 12 Improvements $1,591,280 Huntington Beach, California 92648 Attn: Dennis Dembik Oct-05 Deep Well Pump & Chlorination Facil Ph. (714) 536-5430 Eric Charlonne Ph. (714) 901-2874 Coachella Valley Water Dist #377 85-995 Avenue 52 Lee & Ro Consulting Apr-10 La Quinta Primary Lift Station $1,719,000 Coachella, CA 92236 55-01 Renovations Ph. (760) 398-2651 George Meza Hillcrest Contracting #378 1467 Circle City Dr. Dexter Wilson Engineering Cliffhaven Water Booster Station $ 1,308,268 Corona, CA 92879 Attn: Stephen Nielsen Dec-06 Ph. 951-273-9600 Attn:Darcy Searle Ph. 760-438-4422 McCarthy Building Companies #379 6510 Forest Lawn Drive Psomas Civil Engineers Wet Site Utilities, Water, Sewer, & $ 660,956 Los Angeles, CA 90068 Attn: Ross Barker, V.P. Nov-06 Storm Drain: New Parking Structure Ph. 323-469-0071Attn:Shawn Burkholder Ph. 661-219-6000 Steve P Rados #381 300 St. West Dept of Water Resources Tehachapi East Afterbay $ 447,996 Lancaster, CA 93536 Attn: Mark Castillo Mar-06 Installation of (2) Bulkhead Gates Ph. 714-835-4612 Attn:Fred Doucedame Ph. 661-233-2116 Installation of (2) Hyd Roller Gates

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Contractor List of References & Experience (Page 10) Customer Design Engineer Completed Job # & Description Cont. Amt. FCI/Balfour Beatty RBF Consulting Engineers #382 6185 Manchester Blvd Irvine, CA Route 39 / 5 Pumping Plant $531,564 Buena Park, CA 90621 Attn: Steve Speakman Jul-10 Ph. 714-739-1915#223 Attn:Frank Mancha Ph. 949-855-3646 Warner Bros Studios #383 4000 Warner Boulevard Design - Build Warner Bros. Studios, Burbank $38,421 Burbank, CA 91522 Sep-06 Rehab 48" Sewer Manholes Ph. 818-568-1004 Attn:Dan Guzman Fieldstone Communities #435 2 Ada, Suite 200 Dexter Wilson Engineering Ridgegate Booster Pump Station $1,324,635 Irvine, CA 92618 Attn: Stephen Nielsen Jul-07 City of Chino Hills Ph. 949-730-5400 Attn: Steve Bradley Ph. 760-438-4422 CA Dept of Parks & Recreation Dept of Parks &Recreation #385 3030 Avenida del Presidente Orange Coast District Crystal Cove State Park $ 82,500 San Clemente, CA 92672 Julie Tobin May-07 Water & FH Connection Ph. 949-497-7644 Brian Carlson 949-366-4888 City of Cerritos #386 18125 Bloomfield Avenue Civiltec Engineering, Inc. Reconstruction of Well & Chlorine $ 1,632,116 Cerritos, CA 90703 Attn: Terry Kerger May-07 Facilities Pumping plant C-1. Ph. 562-916-1231 Attn: Kanna VancheswarPh. 626-357-0588 W.A. Rasic #387 7314 Scout Ave Metropolitan Water Dist San Jacinto Diversion Structure $ 361,272 Bell Gardens, CA 90201 Colorado River Aqueduct Mar-07 & Warren Road Radial Gates 562-928-6111 David Lee Rehab & Improvement Meritage Homes #388 5161 California, Ste 200 Steven Andrews Engineer Pine Valley Estates Sewage $ 1,524,875 Irvine, CA 92617 Steven R. Andrews Mar-08 Lift Station 949-777-9531 Attn: Vlad Bruce Ph. 949-215-5050 Irvine Ranch Water District #389 15500 Sand Canyon Ave. Lee & Ro Associates Turtle Rock Zone B+ Booster Sta $ 717,550 Irvine, CA 92618 Kirk Saki Nov-08 Modifications 949-453-5627 Attn: Ron Crim Ph: 626-912-3391 Warner Bros Studios #390 4000 Warner Blvd Warner Brothers WB Polyurethane Lining $29,760 Burbank, CA 91852 Designed by Customer Oct-08 Ph: 818-954-2360 Attn: Dan Guzman Santa Ana Watershed Project Auth. #391 1165 Sterling Avenue SAWPA SARI Reach Maintenance Access $124,393 Riverside, CA 92503 Designed by Customer Oct-08 Structures Project Ph: 951-354-4246 Attn: David Ruhl Eastern Municipal Water District #392 Po Box 8300 Krieger and Stewart Simpson Road Booster Station & $ 1,928,116 Perris, CA 92572 Daniel K. Jaggers Sep-09 Pipeline- Design Build Ph: 951 928-3777 Attn: Gabe Necochea Ph:(951) 684-6900

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Contractor List of References & Experience (Page 11) Customer Design Engineer Completed Job # & Description Cont. Amt. Rancho California Water District #394 42135 Winchester Road RCWD Mainline Valve Improvements $253,708 Temecula, CA 92589 Designed by Customer May-09 At 13 Various Sites Ph: 951-296-6900 Attn: Ken Cope LA County -Internal Services #395 1100 N. Eastern Ave LA County Replace Sewage Ejectors $54,087 Los Angeles, CA 90063 Designed by Customer Jun-09 Ph: 323-267-2307 Warner Bros Studios #435 4000 Warner Blvd Warner Brothers 48" & 72" Storm Water Separators $ 63,090 Burbank, CA 91852 Designed by Customer Jul-09 Ph: 818-954-2360 Attn: Dan Guzman Skanska USA Civil West #397 1995 Agua Mansa Road Steven Andrews Engineering PHIF Storm Drain P.S. Mech. Work Riverside, CA 92509 Steven R. Andrews Dec-11 $496,736 Ph: 909-721-6757 Attn: John Godfrey 949-215-5050 City of Huntington Beach 2000 Main Street Dahl, Taylor, & Associates #398 $272,278 Huntington Beach, California 92648 Santa Ana, CA Mar-10 Central Park Pump Station Ph: 714-536-5430 Attn: Eric Charlonne 949-756-8654 Santa Ana Watershed Project Auth. #399 1165 Sterling Avenue SAWPA 4" Gate Valve @ Agua Mansa $7,608 Riverside, CA 92503 Designed by Customer Jul-09 Ph: 951-354-4223 Attn:Carlos Quintero Warner Bros Studios #400 4000 Warner Blvd Warner Brothers Concrete Rehab & Coatings Work $26,761 Burbank, CA 91852 Designed by Customer Mar-12 Ph: 818-954-2360 Attn: Dan Guzman Warner Bros Studios #401 4000 Warner Blvd Warner Brothers 8" Sewer & Manholes at Stage Infil $75,033 Burbank, CA 91852 Designed by Customer Nov-09 Ph: 818-954-2360 Attn: Dan Guzman Granite Construction Co. #402 213 East Avenue M Tenaska, Inc. High Desert Power Project $153,150 Palmdale, CA 93590-2500 Charlie Hemphill Jan-11 Reclaimed Water System Ph: 661-726-4447 Attn: Jeff King Ph: 402-952-5823 Southwest Pump & Drill #403 53-381 Highway 111 12" Drain at Well No. 1 $18,000 Coachella, CA 92236 May-10 Bellflower Maint. Yard Ph: 760-398-3977 Attn:Curt McCalla Santa Ana Watershed Project Auth. #404 1165 Sterling Avenue SAWPA 18" SARI Repairs and Manhole $32,087 Riverside, CA 92503 Designed by Customer Jun-10 Ph: 951-354-4246 Attn: David Ruhl

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Contractor List of References & Experience (Page 12) Customer Design Engineer Completed Job # & Description Cont. Amt. Santa Ana Watershed Project Auth. #405 1165 Sterling Avenue SAWPA 18" SARI Manhole Access $29,800 Riverside, CA 92503 Designed by Customer Aug-10 Structure Project Ph: 951-354-4246 Attn: Carlos Quintero Warner Bros Studios #406 4000 Warner Blvd Warner Brothers 8" Sewer Repairs @ Bldg #44 $17,846 Burbank, CA 91852 Designed by Customer Oct-10 Ph: 818-954-2360 Attn: Dan Guzman Pacific Hydrotech Corporation #435 314 E. 3rd Street URS Corp Ph II Norwalk Park Well $386,000 Perris, CA 92570 Bernard Puska P.E. Oct-11 Wellhead Facilities & Pipeline Ph: 951-943-8803 Attn: Jonathan Hilbun 909-980-4000 Santa Ana Watershed Project Auth. #408 1165 Sterling Avenue SAWPA SARI Reach IV-B $238,300 Riverside, CA 92503 Designed by Customer Feb-11 Access Structures Project Ph: 951-354-4246 Attn: David Ruhl Warner Bros Studios #409 4000 Warner Blvd Warner Brothers Replace and Install Poly 48" $45,000 Burbank, CA 91852 Designed by Customer May-11 Sewer Manhole Ph: 818-954-2360 Attn: Dan Guzman Santa Ana Watershed Project Auth. #410 1165 Sterling Avenue SAWPA Relocate 4" Isolation Valve $10,201 Riverside, CA 92503 Designed by Customer Aug-11 Ph: 951-354-4246 Attn: Carlos Quintero CA Dept of Parks & Recreation #411 One Capitol Mall, Ste 410 Dept of Parks & Rec Crystal Cove State Park $ 531,120 Sacramento, CA 95814 Gerhard Panuschka Mar-12 Remove & Replace Three (3) Ph: 916-445-8762 Attn:Mark Manning 916-445-8680 Sewer Lift Stations Santa Ana Watershed Project Auth. #412 1165 Sterling Avenue SAWPA Temescal Siphon Improvements $47,049 Riverside, CA 92503 Designed by Customer Aug-11 Ph: 951-354-4246 Attn: Carlos Quintero Inland Empire Utilities Agency #414 6075 Kimball Avenue IEUA Clamps repair on 10" Pipe $1,335 Chino, CA 91708 Emergency Work Oct-11 at Philadelphia Pump Station Ph: 909-993-1723 Attn:Matthew Poeske Inland Empire Utilities Agency #415 6075 Kimball Avenue IEUA Repair Chlorine Leak $19,049 Chino, CA 91708 Emergency Work Nov-11 at Chino 1 Desalter Ph: 909-993-1723 Attn:Matthew Poeske

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Contractor List of References & Experience (Page 13) Customer Design Engineer Completed Job # & Description Cont. Amt. Santa Ana Watershed Project Auth. #416 1165 Sterling Avenue SAWPA 24" SARI Leak Repair $ 66,622 Riverside, CA 92503 Emergency Work Oct-11 at Temescal & Cabot Ph: 951-354-4246 Attn: Carlos Quintero CA Dept of Trans. c/o Griffith Co. #417 3050 E. Birch St. CA Dept of Trans. Jul-12 Emergency Contract Repairs: $64,706 Brea, CA 92821 Div. of Maint, Struct Maint Main Span & East Approach Traveler Ph: (714) 984-5500 Chris Ballantyne Design Engineer Pnueumatic Pipe, valves & fittings Inland Empire Utilities Agency #435 6075 Kimball Avenue IEUA 8" Genon Gate Valve Repairs $7,835 Chino, CA 91708 Emergency Work Feb-12 Archibald Ave, Rancho Cucamonga Ph: 909-993-1723 Attn:Matthew Poeske Inland Empire Utilities Agency #419 6075 Kimball Avenue IEUA 12" Sluice Gate Repairs $20,675 Chino, CA 91708 Emergency Work Mar-12 Prado Road, RP2 Ph: 909-993-1723 Attn:Matthew Poeske Santa Ana Watershed Project Auth. #420 1165 Sterling Avenue SAWPA Reach IV-E Improvements $ 186,000 Riverside, CA 92503 Design Engineer Mar-12 Drying Beds & Access Struct. Ph: 951-354-4246 Attn: Carlos Quintero Water Agency #421 27234 Bouquet Canyon Road Lee & Ro Jul-12 Earl Schmidt Filtration Plant $197,550 Santa Clarita, CA 91350 Ammonia Containment & Analyzer Ph: (661) 297-1600 Attn: Jim Lesserman CA Dept of Parks & Recreation #422 8471 Pacific Coast Hwy. Dept of Parks & Rec Crystal Cove State Park $ 6,949 Laguna Beach, CA 92651 Mar-12 Emergency Contract Repairs: Ph: (949) 497-7644, Attn: Brian Carlson 6" Pipeline, PCH & Pelican Pt. Santa Ana Watershed Project Auth. #423 1165 Sterling Avenue SAWPA Emergency Contract Repairs: $2,842 Riverside, CA 92503 Emergency Work Mar-12 Sidewalk Repairs Ph: 951-354-4246 Attn: Carlos Quintero Inland Empire Utilities Agency #424 6075 Kimball Avenue IEUA Jun-12 Emergency Contract Repairs: $19,740 Chino, CA 91708 Emergency Work RP2 Gas Condensate Drip Trap Ph: 909-993-1723 Attn:Matthew Poeske City of Santa Paula #425 970 Ventura Street Water Resource Engr Assoc Dec-12 Wastewater Lift Station $330,757 Santa Paula, CA 93061 Barney Caudill Rehabilitation Project Ph: 805-933-4211 Attn: Raul Gaitan 805-653-7900 Orange County Sanitation Dist. #427 10844 Ellis Ave. OCSD Jan-13 Area 7 Diversion MH #80 Reconstruct $86,125 Fountain Valley, CA 92708 Project # FE-07-03 Chapman Ave & Esplande, Orange CA Ph: 714-593-7559, Attn: Bud Palmquist

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Contractor List of References & Experience (Page 14) Contract Customer Design Engineer Completed Job # & Description Amount Volunteer Project: Operation Homefront #428 33422 Dolomite CALIAGUA Frontyard & Backyard Makeover $0.00 Menifee CA 92584 Volunteer Project Oct-12 for US Marine & Family

Security Paving Company #430 c/o City of Bakersfield CA AECOM Mar-15 Project No. T9WP6C $1,168,310 13170 Telfair Ave., Sylmar, CA Dan Cronquist WestSide Parkway - Phase 6C PM: Pedro Santos 661-873-0495 661-325-7253 Ext 3108 Renfro Road Storm Drain Pump Station Santa Ana Watershed Project Auth. #435 1165 Sterling Avenue SAWPA Install Polymer MH with R&R of $15,470 Riverside, CA 92503 Design Engineer Apr-13 existing 15" Clay Sewer Lateral Ph: 951-354-4246 Attn: Carlos Quintero City of Corona Water Reclaim. Plant #1 Santa Ana Watershed Project Auth. #432 1165 Sterling Avenue SAWPA Reach IV-B Improvements $6,134 Riverside, CA 92503 Design Engineer Apr-13 Sidewalk Repairs Ph: 951-354-4246 Attn: Carlos Quintero Security Paving Company #433 c/o City of Bakersfield CA CADOT SR-58 Widening $ 208,960 13170 Telfair Ave., Sylmar, CA Design Engineer Mar-12 Mechancial work at SD Pump Plant PM: Anthony Mattivi (TJ) 661-873-0495 Woodbrige Pacific Homes #438 c/o City of Chino Hills Hunsaker & Assoc. City of Chino Hills $3,419,061 27285 Las Ramblas, #230 Mission Viejo CA John Gass Dec-16 Canyon Hills Potable Water Booster PM: Robert Richards 949-445-4612 and Sewage Lift Station

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Contractor List of References & Experience (Work In Progress) Estimated Contract Customer Design Engineer Completion Job # & Description Amount Security Paving Company #429 c/o City of Bakersfield CA CADOT Contract No. 07-1218W4 $1,604,273 13170 Telfair Ave., Sylmar, CA & Tetra Tech Mar-16 Subcontract to consturct Empire Ave UC PM: Frank Riggins 818-362-9200 Storm Drain Pumping Plant Riverside Construction Co. #434 c/o San Bern. Assoc. Governments AECOM Mar-15 Contract No. C13121 $2,101,962 4225 Garner Road, Riverside CA 92502 Dan Cronquist Laurel Ave Grade Separation PM: Casey Carpenter 951-682-8308 661-325-7253 Ext 3108 Storm Drain Pumping Plant USS Cal Builders #435 c/o City of Fullerton Kennedy/Jenks Consultants State College Blvd Grade Separation $1,387,293 8051 Main St., Stanton CA 90680 Design Engineer Apr-16 State College UC Storm Drain Pump Sta. PM: Chris Nguyen 714-376-4599 City of Fullerton Security Paving Company #436 c/o CADOT CADOT Contract No. 07-215954 $944,709 13170 Telfair Ave., Sylmar, CA Design Engineer Jun-16 Interstate 5/605 Improvments PM: Hani Alikhwan 562-863-3176 Construct New Storm Drain Pump Plant Security Paving Company #437 c/o City of Bakersfield CA CADOT SR-58 Widening to SR 99 $ 892,258 13170 Telfair Ave., Sylmar, CA Design Engineer Sep-16 Ming Ave. Storm Water Pumping Plant PM: Michael Sheffield 661-873-0495

F:\USR\Admin\References\2016 v1\Previous Work History Updated Jan 2016.xls 15148 Sierra Bonita Lane Chino, CA 91710-8903 Ph. 909.393.9398 Fx 909.597.5167 License# 359728

Contractor List of References & Experience (City of LA) Customer Design Engineer Completed Job Description Cont. Amt.

City of Los Angeles City of Los Angeles Dec-00 Emergency Storm Drain Repair $ 30,208 Attn: Azadeh Abrishami Attn: Azadeh Abrishami Stone Canyon Ph. (310) 575-8651 Ph. (310) 575-8651 #336 City of Los Angeles City of Los Angeles Mar-00 Emergency Sewer Repair $ 213,269 Attn: Jim Corralejo Attn: Jim Corralejo Pasadena Street Ph. (213) 847-5080 Ph. (213) 847-5080

City of Los Angeles City of Los Angeles Apr-00 Emergency Storm Drain Repair $ 82,052 Attn: Lynn Hanami-Cummings Attn: Lynn Hanami-Cummings Normandie & Torrance Ph. (310) 732-4693 Ph. (310) 732-4693 #329 City of Los Angeles City of Los Angeles Jun-99 Emergency On-Call Sewer Repair $ 54,476 Attn: Lee Pitman Attn: Lee Pitman Bellagio Road Emergency Repair Ph. (310) 575-8637 Ph. (310) 575-8637

City of Los Angeles City of Los Angeles Jun-99 Emergency On-Call Sewer Repair $ 191,686 Attn: Ben Abdian Attn: Ben Abdian Temple Street Area Emergency Repr Ph. (213) 847-5124 Ph. (213) 847-5124

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