Allied Pump Rentals

 877.987.8677

 Allied Underwater Services, Inc.

 877.987.8677

 Alloway

 800.436.1243

 ARCADIS

 Akron - 800.456.0817
 Cleveland - 888.654.2538
 Cincinnati - 800.289.8807
 Columbus - 614.764.2310
 Toledo - 800.876.1121

 Baker & Associates

 440.461.4577

 Barefoot & Case, Inc.

 440.617.0280

 The Bergren Associates 

 Middleburg Heights - 440.239.9445
 Toledo - 419.843.2170

 BissNuss, Inc. 

 Westlake - 440.871.8394
 Cincinnati - 513.677.8700
 Canfield - 330.533.5531

 Black & Veatch 

 Cincinnati - 513.505.1982
 Columbus - 614.473.0921
 Toledo - 419.720.0900 

 BNR, Inc. 

 888.256.3142 

 Brown and Caldwell 

 Columbus - 614.410.6144
 Cincinnati - 513.719.6100
 Cleveland, - 440.826.4900 

 Burgess & Niple, Inc. 

 614.459.2050 

 Chesley Associates, Inc.

 513.531.7103

 CH2M Hill 

 Cincinnati - 513.489.0779
 Cleveland - 216.623.0326
 Columbus - 614.888.3100
 Dayton - 937.228.4285

 CTI Engineers, Inc.

 Akron - 330.294.5996
 Canton - 330.455.7733

 CT Consultants, Inc. 

 ECO₂

 858.272.7102

 E & I Corporation 

 614.899.2282 

 E. L. Robinson 

 740.532.2411 

 EMH&T 

 888.775.3648 

 Engineering Associates, Inc. 

 330.345.6556 

 EnviroScience, Inc. 

 800.940.4025 

 Fishbeck, Thompson, Carr & Huber 

 800.456.3824 

 Gannett Fleming Engineers 

 Akron - 330.668.8800
 Westerville - 614.794.9424 

 GRW

 614.825.4780

 Hammontree & Associates, Limited 

 800.394.8817 

 Hazen and Sawyer, P.C. 

 513.469.2750 

 Henry Pratt Company

 HNTB Corporation 

 513.421.4682 

 H. R. Gray 

 Columbus - 614.487.1335
 Akron - 330.379.3200 

 ITT Water and Wastewater 

 513.831.7867 

 J. Dwight Thompson

 513.871.9970

 JGM Valve

 John Wolfram & Associates, LLC 

 440.834.4884 

 Jones & Henry Engineers 

 Toledo - 419.473.9611
 Cincinnati - 513.528.5599 

 Jones & Henry Laboratories, Inc. 

 419.666.0411 

 Malcom Pirnie, Inc.

 800.759.5020 

 Metropolitan Industries 

 330.222.2400 

 Mixing Systems, Inc.

 ms consultants, inc. 

 Columbus - 614.898.7100
 Youngstown - 330.744.5321
 Canton - 330.492.6350
 Akron - 330.928.9617
 Cleveland - 216.581.4035 

 MWH

 Cleveland - 216.621.2407
 Columbus - 614.324.2220

 Natgun Corporation 

 614.777.9886 

 O'Brien & Gere

 513.697.2023

 RA Consultants, LLC

 RootX 

 800.844.4974 Ext. 207 

 Schultz Fluid Handling Equipment 

 216.676.9777 

 Stantec 

 614.486.4383 

 Strand Associates, Inc. 

 Columbus - 614.835.0460
 Cincinnati - 513.861.5600 

 Sullivan Environmental Technologies, Inc. 

 859.426.5178 

 TCCI Laboratories Inc.

 740.342.1110

 Tele-Vac Environmental 

 513.398.4521 

 The Henry P. Thompson Company

 513.248.3202

 URS 

 Akron - 330.836.9111
 Cincinnati - 513.651.3440
 Cleveland - 216.622.2400
 Columbus - 614.464.4500
 Toledo - 419.246.0839 

 USA Blue Book

 800.548.1234 

 W. E. Quicksall and Associates, Inc. 

 330.339.6676