Clark Seif Clark, Inc. (CSC)

What They Do

MoldMold TestingFire and SmokeBiohazardAsbestosLead Paint

• Brownfields & voluntary remediation
• Environmental due diligence
• Hazardous waste & superfund
• Storage tanks & spill prevention
• Water quality monitoring
• Cleaning & Restoration
• Compliance Audits
• Debris Cleanup
• Environmental Compliance Services
• Environmental Engineering
• Hazardous Materials Management
• Health & Safety Compliance
• Health And Safety Plans
• Lead Paint
• Lead Survey
• Litigation Support
• Mold Remediation
• OSHA-compliance consulting
• Phase I environmental assessments
• Phase II subsurface sampling
• Regulatory Compliance
• Safety Management Services
• Soil And Groundwater Investigations
• abatement project monitoring
• asbestos screening service
• biohazard assessment service
• engineering litigation support
• environmental assessment consultation

In Their Own Words

Clark Seif Clark, Inc. (CSC) is a leading environmental consulting firm located at 112 S. Kyrene, Suite 2, specializing in diverse services such as industrial lead paint detection, environmental compliance audits, and professional moisture mapping services. With nearly 30 years of expertise, CSC is renowned for providing top-tier environmental assessments and consulting, soil and water quality testing, and smoke inspections. We excel in complex environmental testing and engineering litigation support, catering to both private and public sectors. Our firm proudly serves Southern California and beyond, ensuring environmental safety and regulatory adherence. Reach out today for expert guidance on your environmental needs.

Written by the business on its public profile. We have not verified these claims.

Before You Call Clark Seif Clark, Inc. (CSC)

1. Where do you think the moisture is coming from, and who fixes it?
2. Will you set up containment and negative air, and how will you protect the rest of the home?
3. Do you also do remediation? If so, who checks your work?
4. How many air samples will you take, and will you take an outdoor control sample?
5. How will you deal with smoke odor inside wall cavities and the HVAC ducts?

Ask for the company’s contractor license number and look it up with the Arizona Registrar of Contractors. Also ask for proof of insurance and industry certification for the technicians.

How Their Reviews Break Down

Counts from public listings as of September 23, 2026. A handful of reviews says less than a few hundred.

Read This While You Wait

• DIY with careSafe DIY Mold Cleanup for Areas Under 10 Square FeetA step by step method to clean up mold under 10 square feet safely, with the gear to buy, what to throw away, why bleach is not the default, and when to stop.
• Call a proMold Testing, When It Is Worth It and How to Read a Lab ReportWhen a mold test is worth paying for, which kind to ask for, why store kits mislead, and how to read spore counts, outdoor controls and a lab report yourself.
• Call a proThe First 48 Hours After a House FireWhat to do in the first two days after a house fire. Safe re-entry, utilities, insurance calls, securing the home, food, medicine and what never to clean.
• Call a proTrauma and Unattended Death Cleanup, What Families Should KnowA gentle guide for families after a death or injury at home. What you do not have to do yourself, how cleanup works, who pays, and how to choose a crew.