OSHPD Preapproved Laboratory (OPL) Program*
Approved Testing Agencies/Laboratories for Structural Tests

OSHPD Preapproved Laboratory (OPL)Number Approved Laboratory Name City County State
(Use Country Name for non-US Labs)
ZIP Code Approval Expiration Date Comments
OPL-0001-14 Dynamic Certification Laboratories (DCL) Sparks Washoe Nevada 89431 Expired See OPAA-0008-16
OPL-0002-14 CHJ Colton San Bernardino California 92324 Expired See OPAA-0014-16
OPL-0003-14 CHJ Victorville San Bernardino California 92392 Expired  
OPL-0004-14 Caltech Labs Brea Orange California 92821 03/25/2018 See Attachment
OPL-0005-14 Applied Technical Services (ATS) Marietta Cobb Georgia 30062 01/31/2018 See Attachment
OPL-0006-14 Consolidated Engineering Laboratories (CEL) Oakland Alameda California 94606 10/16/2019 See Attachment
OPL-0007-14 Construction Testing & Engineering, Inc. (CTE) Escondido San Diego California 92026 02/05/2020 See Attachment
OPL-0008-14 CTE South, Inc. Oxnard Ventura California 93033 Expired  
OPL-0009-14 CTE South, Inc. Riverside Riverside California 92518 Expired  
OPL-0010-14 American Engineering Laboratories, Inc. La Habra Orange California 90631 Expired  
OPL-0011-14 United Inspection & Testing Moreno Valley Riverside California 92553 09/10/2017 See Attachment
OPL-0012-14 Consolidated Engineering Laboratories (CEL) Windsor Sonoma California 95492 Expired  
OPL-0013-14 BSK Associates Livermore Alameda California 94551 Expired  
OPL-0014-14 DC Inspections, Inc. Bakersfield Kern California 93308 Expired  
OPL-0015-14 Smith-Emery Laboratories Los Angeles Los Angeles California 90021 08/20/2017 See Attachment
OPL-0016-15 BSK Associates Bakersfield Kern California 93301 Expired  
OPL-0017-15 Technicon Engineering Services, Inc. Fresno Fresno California 93722 05/29/2020 See Attachment
OPL-0018-15 Consolidated Engineering Laboratories (CEL) North Highlands Sacramento California 95660 11/01/2018 See Attachment
OPL-0019-15 Certified Inspection Labs South El Monte Los Angeles California 91733 12/19/2017 See Attachment
OPL-0020-15 Smith-Emery San Francisco San Francisco San Francisco California 94124 04/06/2018 See Attachment
OPL-0021-15 Indpsolutions, Inc. dba Independent Solutions Lake Elsinore Riverside California 92530 01/31/2018 See Attachment
OPL-0022-15 Mid Pacific Engineering, Inc. West Sacramento Yolo California 95605 01/09/2019 See Attachment
OPL-0023-15 Kleinfelder Hayward Alameda California 94545 6/26/2020 See Attachment
OPL-0024-15 Southern California Soil & Testing, Inc. San Diego San Diego California 92120 Expired See OPAA-0012-16
OPL-0025-15 NV5 West, Inc. Ventura Ventura California 93003 9/25/2019 See Attachment
OPL-0026-15 Kleinfelder Sacramento Sacramento California 95827 Expired  
OPL-0027-15 RMA Group, Inc. Rancho Cucamonga San Bernardino California 91730 Expired  
OPL-0028-15 Twining, Inc. San Bernardino San Bernardino California 92408 Expired See OPAA-0011-16
OPL-0029-15 Twining, Inc. Ventura Ventura California 93003 Expired See OPAA-0005-16
OPL-0030-15 Twining, Inc. Long Beach Los Angeles California 90806 Expired See OPAA-0013-16
OPL-0032-15 Holdrege & Kull Consulting Engineers & Geologist Nevada City Nevada California 95959 03/13/2018 See Attachment
OPL-0033-15 Progressive Engineering Inc. Goshen Elkhart Indiana 46528 09/29/2017 See Attachment
OPL-0034-15 Twining, Inc. Irvine Orange California 92614 04/15/2019 See Attachment
OPL-0035-15 Inspection Services, Inc. Berkeley Alameda California 94703 Expired  
OPL-0036-15 Twining, Inc. San Diego San Diego California 92127 03/28/2019 See Attachment
OPL-0037-15 Signet Testing Laboratories, Inc. Hayward Alameda California 94545 07/11/2019 See Attachment
OPL-0038-15 Moore Twining Associates, Inc. Sand City Monterey California 93955 05/12/2019 See Attachment
OPL-0039-15 Inspection Services, Inc. Torrance Los Angeles California 90501 Expired  
OPL-0040-15 Southwest Research Institute San Antonio Bexar Texas 78227 Expired See OPAA-0001-16
OPL-0041-15 MTL, Inc. San Diego San Diego California 92121 Expired  
OPL-0042-15 Kleinfelder, Inc. San Diego San Diego California 92111 09/23/2018 See Attachment
OPL-0043-16 Geocon West, Inc. Murrieta Riverside California 92562 Expired  
OPL-0044-16 Christian Wheeler Engineering San Diego San Diego California 92105 11/25/2018 See Attachment
OPL-0045-16 Kleinfelder, Inc. Ontario San Bernardino California 91762 Expired See OPAA-10-16
OPL-0046-16 Twining, Inc. Sacramento Sacramento California 95838 Expired  
OPL-0047-16 Krazan & Associates, Inc. Bakersfield Kern California 93307 Expired  
OPL-0048-16 CEL Consulting, Inc. Oakland Alameda California 94606 11/06/2018 See Attachment
OPL-0049-16 Krazan & Associates, Inc. Clovis Fresno California 93612 Expired  
OPL-0050-16 Nova Services, Inc. San Diego San Diego California 92123 Expired  
OPL-0051-16 Moore Twining Associates, Inc. Fresno Fresno California 93721 Expired See OPAA-0006-16


*See Poicy Intent Notice 58 (PIN 58).


This page was last updated on Monday, July 24, 2017.