Contact Us: 2945 Bell Road #122 Auburn, CA 95603
Fax: 530-888-1177


More than 30 years of services. Feedback from a few clients.

Our Performance

We appreciate you taking time to provide feedback regarding your experience of our service.


RL - Oakland, CA

"Thanks for your services this year and throughout the years. We appreciate the quick response and flexibility that you have provided. Please pass on our thanks to the rest of the staff for their excellent service and we look forward to working with you in the future."

KS - Santa Ana, CA

"I really appreciate that you have been quite prompt, accommodating and helpful. This is my first time involved in this, but good customer service is good customer service whatever the job."

SS - Sacramento, CA

"I've used CHH for many years. They are dependable and very competent at what they do. Their customer service is exceptional. They provide me a timely report and meet all regulatory requirements."

TB - Sacramento, CA

"It went so smooth.. we hardly knew you were here."

GC- Santa Clara, CA

"I wholeheartedly thank you for your prompt service, excellent communication, not only with me, but with each department coordinator."

JS - San Diego

"I just wanted to let you know that your technician did a FANTASTIC job. He took the time to really explain the testing and then talked to each group after testing regarding their results. I was really happy with the service we received."