OSHPD Preapproved Laboratory (OPL) Program*

Approved Testing Agencies/Laboratories for Structural Tests

OSHPD Preapproved Laboratory (OPL)NumberApproved Laboratory NameCityCountyState
(Use Country Name for non-US Labs)
ZIP CodeApproval Expiration DateComments
OPL-0001-14Dynamic Certification Laboratories (DCL)SparksWashoeNevada89431ExpiredSee OPAA-0008-16
OPL-0002-14CHJColtonSan BernardinoCalifornia92324ExpiredSee OPAA-0014-16
OPL-0003-14CHJVictorvilleSan BernardinoCalifornia92392Expired 
OPL-0004-14Caltech LabsBreaOrangeCalifornia92821Expired 
OPL-0005-14Applied Technical Services (ATS)MariettaCobbGeorgia30062Expired 
OPL-0006-14Consolidated Engineering Laboratories (CEL)OaklandAlamedaCalifornia9460610/16/2019See Attachment
OPL-0007-14Construction Testing & Engineering, Inc. (CTE)EscondidoSan DiegoCalifornia9202602/05/2020See Attachment
OPL-0008-14CTE South, Inc.OxnardVenturaCalifornia93033Expired 
OPL-0009-14CTE South, Inc.RiversideRiversideCalifornia92518Expired 
OPL-0010-14American Engineering Laboratories, Inc.La HabraOrangeCalifornia90631Expired 
OPL-0011-14United Inspection & TestingMoreno ValleyRiversideCalifornia92553ExpiredSee OPAA-0037-16
OPL-0012-14Consolidated Engineering Laboratories (CEL)WindsorSonomaCalifornia95492Expired 
OPL-0013-14BSK AssociatesLivermoreAlamedaCalifornia94551Expired 
OPL-0014-14DC Inspections, Inc.BakersfieldKernCalifornia93308Expired 
OPL-0015-14Smith-Emery LaboratoriesLos AngelesLos AngelesCalifornia90021ExpiredSee OPAA-0023-16
OPL-0016-15BSK AssociatesBakersfieldKernCalifornia93301ExpiredSee OPAA-0019-16
OPL-0017-15Technicon Engineering Services, Inc.FresnoFresnoCalifornia9372205/29/2020See Attachment
OPL-0018-15Consolidated Engineering Laboratories (CEL)North HighlandsSacramentoCalifornia9566011/01/2018See Attachment
OPL-0019-15Certified Inspection LabsSouth El MonteLos AngelesCalifornia91733ExpiredSee OPAA-0021-16
OPL-0020-15Smith-Emery San FranciscoSan FranciscoSan FranciscoCalifornia94124ExpiredSee OPAA-0036-16
OPL-0021-15Indpsolutions, Inc. dba Independent SolutionsLake ElsinoreRiversideCalifornia92530ExpiredSee OPAA-0028-16
OPL-0022-15Mid Pacific Engineering, Inc.West SacramentoYoloCalifornia9560501/09/2019See Attachment
OPL-0023-15KleinfelderHaywardAlamedaCalifornia945456/26/2020See Attachment
OPL-0024-15Southern California Soil & Testing, Inc.San DiegoSan DiegoCalifornia92120ExpiredSee OPAA-0012-16
OPL-0025-15NV5 West, Inc.VenturaVenturaCalifornia930039/25/2019See Attachment
OPL-0026-15KleinfelderSacramentoSacramentoCalifornia95827Expired 
OPL-0027-15RMA Group, Inc.Rancho CucamongaSan BernardinoCalifornia91730Expired 
OPL-0028-15Twining, Inc.San BernardinoSan BernardinoCalifornia92408ExpiredSee OPAA-0011-16
OPL-0029-15Twining, Inc.VenturaVenturaCalifornia93003ExpiredSee OPAA-0005-16
OPL-0030-15Twining, Inc.Long BeachLos AngelesCalifornia90806ExpiredSee OPAA-0013-16
OPL-0031-15Structure Materials GroupLivermoreAlamedaCalifornia94550ExpiredSee OPAA-0034-16
OPL-0032-15Holdrege & Kull Consulting Engineers & GeologistNevada CityNevadaCalifornia95959Expired 
OPL-0033-15Progressive Engineering Inc.GoshenElkhartIndiana46528ExpiredSee OPAA-0024-16
OPL-0034-15Twining, Inc.IrvineOrangeCalifornia9261404/15/2019See OPAA-0017-16
OPL-0035-15Inspection Services, Inc.BerkeleyAlamedaCalifornia94703ExpiredSee OPAA-0032-16
OPL-0036-15Twining, Inc.San DiegoSan DiegoCalifornia9212703/28/2019See Attachment
OPL-0037-15Signet Testing Laboratories, Inc.HaywardAlamedaCalifornia9454507/11/2019See Attachment
OPL-0038-15Moore Twining Associates, Inc.Sand CityMontereyCalifornia9395505/12/2019See Attachment
OPL-0039-15Inspection Services, Inc.TorranceLos AngelesCalifornia90501ExpiredSee OPAA-0030-16
OPL-0040-15Southwest Research InstituteSan AntonioBexarTexas78227ExpiredSee OPAA-0001-16
OPL-0041-15MTL, Inc.San DiegoSan DiegoCalifornia92121Expired 
OPL-0042-15Kleinfelder, Inc.San DiegoSan DiegoCalifornia9211109/23/2018See Attachment
OPL-0043-16Geocon West, Inc.MurrietaRiversideCalifornia92562Expired 
OPL-0044-16Christian Wheeler EngineeringSan DiegoSan DiegoCalifornia9210511/25/2018See Attachment
OPL-0045-16Kleinfelder, Inc.OntarioSan BernardinoCalifornia91762ExpiredSee OPAA-0010-16
OPL-0046-16Twining, Inc.SacramentoSacramentoCalifornia95838Expired 
OPL-0047-16Krazan & Associates, Inc.BakersfieldKernCalifornia93307Expired 
OPL-0048-16CEL Consulting, Inc.OaklandAlamedaCalifornia9460611/06/2018See Attachment
OPL-0049-16Krazan & Associates, Inc.ClovisFresnoCalifornia93612Expired 
OPL-0050-16Nova Services, Inc.San DiegoSan DiegoCalifornia92123Expired 
OPL-0051-16Moore Twining Associates, Inc.FresnoFresnoCalifornia93721ExpiredSee OPAA-0006-16