OSHPD Preapproved Agency (OPAA)*

Approved Agencies for Structural Tests and Special Inspections

OSHPD Preapproved Agency (OPAA)NumberApproved Agency NameCityCountyState
(Use Country Name for non-US Labs)
ZIP CodeTestingSpecial InspectionsApproval Expiration DateComments
OPAA-0001-16Southwest Research InstituteSan AntonioBexarTexas78227YesNoExpired
OPAA-0002-16Ninyo and MooreSan DiegoSan DiegoCA92123YesYesExpired
OPAA-0003-16Achievement EngineeringSan JoseSanta ClaraCA95131YesYes10/18/2020See Attachment
OPAA-0004-16Applied Materials & EngineeringOaklandAlamedaCA94608YesYesExpired
OPAA-0005-16TwiningVenturaVenturaCA93003YesYes10/07/2020See Attachment
OPAA-0006-19Moore TwiningFresnoFresnoCA93721YesYesExpired
OPAA-0007-16IABGOttobrunn (Munich)BavariaGermanyD-85521YesNo12/17/2022See Attachment
OPAA-0008-16DCLSparksWashoeNV89431YesNo1/24/2023See Attachment
OPAA-0009-16Group Delta ConsultantsSan DiegoSan DiegoCA92126YesYes9/15/2020See Attachment
OPAA-0010-16Kleinfelder WestOntarioSan BernardinoCA91762YesYesExpired
OPAA-0011-16TwiningRiversideRiversideCA91730YesYes10/2/2020See Attachment
OPAA-0012-16aSCSTSan DiegoSan DiegoCA92120YesYes4/25/2021See Attachment
OPAA-0013-16Twining Inc.Long BeachLos AngelesCA90806YesYes4/25/2021See Attachment
OPAA-0014-16Terracon Consultants, Inc.ColtonSan BernardinoCA92324YesYes2/23/2021See Attachment
OPAA-0015-19RMA GroupRancho CordovaSacramentoCA95742YesYes9/28/2020See Attachment
OPAA-0016-16Fenagh Engineering and Testing, LLC.Rancho CucamongaSan BernardinoCA91730YesYes11/15/2021See Attachment
OPAA-0017-16TwiningIrvineOrangeCA92614YesYesExpired
OPAA-0018-16JE & B Engineering, Inc.City of IndustryLos AngelesCA91744YesYes8/30/2021See Attachment
OPAA-0019-16BSK AssociatesBakersfieldKernCA93301YesYes4/25/2021See Attachment
OPAA-0020-16Construction Testing ServicesPleasantonAlameda CountyCA94588YesYes10/1/2020See Attachment
OPAA-0021-16Certified Inspection LabsAnaheimOrangeCA92802YesYes3/12/2024See Attachment
OPAA-0022-16Leighton Consulting Inc.San DiegoSan DiegoCA92123YesYes5/10/2021See Attachment
OPAA-0023-16Smith-Emery LaboratoriesLos AngelesLos AngelesCA90021YesYes08/20/2021See Attachment
OPAA-0024-19Progressive Engineering, Inc.GoshenElkhartIN46528YesNoExpired
OPAA-0025-16Soils Engineering, Inc.BakersfieldKernCA93313YesYes10/24/2020See Attachment
OPAA-0026-16GeoSolutions, IncSan Luis ObispoSan Luis ObispoCA93401YesYes3/2/2024See Attachment
OPAA-0027-16RMA GroupRancho CucamongaSan BernardinoCA91730YesYes4/25/2021See Attachment
OPAA-0028-16Independent SolutionsLake ElsinoreRiversideCA92530YesYes01/30/2026See Attachment
OPAA-0029-16Ninyo and MooreSan JoseSanta ClaraCA95131YesYesExpired
OPAA-0030-16Inspection Services Inc.TorranceLos AngelesCA90501YesYes4/27/2024See Attachment
OPAA-0031-16Wallace-Kuhl & AssociatesWest SacramentoYoloCA95691YesYes9/10/2021See Attachment
OPAA-0032-16Inspection Services, Inc. BerkeleyAlamedaCA94703YesYes3/13/2021See Attachment
OPAA-0033-16Caltech Labs, Inc. BreaOrangeCA92821YesYes3/25/2022See Attachment
OPAA-0034-16Structure GroupsLivermoreAlamedaCA94550YesYes2/10/2023See Attachment
OPAA-0035-16California Testing & InspectionParamountLos AngelesCA90723YesYes6/30/2021See Attachment
OPAA-0036-16Smith-Emery San FranciscoSan FranciscoSan FranciscoCA94124YesYes4/6/2022See Attachment
OPAA-0037-16United Testing, LLCMoreno ValleyRiversideCA92553YesYes9/10/2021See Attachment
OPAA-0038-16MatriScope Engineering Laboratories, Inc.SacramentoSacramentoCA95811YesYesExpired
OPAA-0039-19Consolidated Engineering LaboratoriesOaklandAlamedaCA94606YesYes3/16/2023See Attachment
OPAA-0040-16Southwest Inspection and TestingLa HabraOrangeCA90631YesYes2/23/2021See Attachment
OPAA-0041-16CEL ConsultingOaklandAlamedaCA94606YesNo7/1/2022See Attachment
OPAA-0042-16Kleinfelder, Inc.San DiegoSan DiegoCA92111YesYes9/25/2022See Attachment
OPAA-0043-16Consolidated Engineering LaboratoriesWindsorSonomaCA95492YesYes7/11/2021See Attachment
OPAA-0044-16NV5 West Inc.VenturaVenturaCA93003YesNoIn ReviewIn Review
OPAA-0045-16Terracon ConsultantsSacramentoSacramentoCA95834YesYes9/7/2021See Attachment
OPAA-0046-16Construction Testing Services, Inc.RocklinRocklinCA95677YesYes2/13/2021See Attachment
OPAA-0047-16MTGL, IncSan DiegoSan DiegoCA92121YesYes4/22/2021See Attachment
OPAA-0048-16MTGL, IncAnaheimOrangeCA92806YesYesExpired
OPAA-0049-16Twinning, IncSan DiegoSan DiegoCA92127YesYes3/28/2023See Attachment
OPAA-0050-16Consolidated Engineering LaboratoriesNorth HighlandsSacramentoCA95660YesYes11/1/2022See Attachment
OPAA-0051-16Christian Wheeler EngineeringSan DiegoCA92105YesYesYes11/25/2022See Attachment
OPAA-0052-16Interteck Architectural testing IncFresnoCA93706YesNoIn ReviewIn Review
OPAA-0053-16RMA GroupSan JoseSanta ClaraCA95112YesYes11/9/2022See Attachment
OPAA-0054-16BSK AssociatesLivermoreAlamedaCA94551YesYes10/28/2020See Attachment
OPAA-0055-19Landmark Consultants, Inc.El CentroImperialCA92243YesYes4/25/2021See Attachment
OPAA-0056-19Apex Testing LabsSan FranciscoSan FranciscoCA94124YesYesIn ReviewIn Review
OPAA-0057-19TwiningSacramentoSacramentoCAYesYesIn ReviewIn Review
OPAA-0058-19American Engineering LaboratoriesLa HabraOrangeCA90631YesYes10/20/2020See Attachment
OPAA-0059-19Koury Engineering & Testing, IncChinoSan BernardinoCA91710YesYes3/15/2022See Attachment
OPAA-0060-19GeoSoils, IncCalsbadSan DiegoCA92010YesNoIn ReviewIn Review
OPAA-0061-19Moore TwiningSacramentoSacramentoCA95815YesYes07/17/2020See Attachment
OPAA-0062-19Moore TwiningSand CityMontereyCA93955YesYesIn ReviewIn Review
OPAA-0063-19KleinfelderHaywardAlamedaCA94545YesYesIn ReviewIn Review