opacity testing

DWCC LLC is a California-based mobile diesel emissions testing company specializing in CARB Clean Truck Check compliance for heavy-duty diesel vehicles over 14,000 pounds. It performs on-site OBD, visual, and opacity testing for fleet owners and operators throughout Southern California, including Orange County, Los Angeles County, and San Diego County, aiming to minimize downtime. The team has over 16 years of hands-on diesel truck experience.

mobile emissions testingOBD testingon-site testingvisual testing

Environmental Express Services, Inc. (EES) specializes in environmental impact analysis, natural resources management studies, and environmental compliance, providing extensive support to numerous federal clients. Founded in 1998 and owned and managed by Gloria Hagge, President and Senior Environmental Scientist, EES is a woman-owned, Veteran Owned Small Business (VOSB) classified under Architect-Engineering services.

air emissions inventoriescultural resource studiesenvironmental complianceenvironmental impact analysisforest management planningGIS mappingnatural resources managementNEPA environmental assessmentsPhase I ESAsSPCC planswildland fire management planning

Exfil Mobile Diesel Solutions provides fully equipped mobile diesel repair to semi trucks and trailers across Claremont, Fontana, Santa Ana, Moreno Valley, Los Angeles, and Long Beach, California. The veteran-owned, owner-operated business has over 8 years of hands-on diesel repair experience and serves commercial fleets and owner-operators for scheduled maintenance and urgent breakdowns. It is licensed and insured, with mechanics certified in Freightliner and Cummins Diesel systems.

24/7 emergency responseair brake system repaircomputer diagnosticscoolant system repairEGR & DPF repairemergency tire replacementfluid replacementHVAC system repairmobile diesel repairmobile weldingsuspension repair

G 2 G OTR is a Southern California mobile emissions testing business based in Temecula, serving Temecula and surrounding cities and counties. It provides Clean Truck Check and Commercial Harbor Craft OBD+OVI diesel emissions inspections for CTC-VIS reporting and C.A.R.B. compliance. The company was started by Samuel P. Gray and Charles L Gray Sr., both certified testers under the Clean Truck Check Heavy Duty / Industrial Maintenance Program.

CTC-VIS reportingmobile emissions testingOBD emissions inspections