Controlled Environmental Testing Agency



CSI is a NEBB Certified Firm that specializes in Cleanroom Services & Investigation for the microelectronic, bio/pharmaceutical, & other high-tech industries in Northern California. We have a combined 25 years experience in Cleanroom Design & Performance Testing.
We bring high quality and detail to our projects, aided by a Quality Management System (QMS) that complies with:

  • 10CFR50 Appendix-B

  • ANSI/N45.2, ANSI/NCLS Z540-1-1994, MIL-STD 45662A

  • ANSI/ASQ Q9001, BS EN ISO 9001, ISO 9001, EN ISO 9001

  • ISO 10012

  • ISO/IEC 17025

Our Analysis Reports can be issued in hard copy or PDF format by e-mail, USB Flash Drive, and/or DVD/CD and can be prepared according to cGMP, if requested.
Our standard testing procedures are based on ANSI, IEST, ISO, NEBB, and NSF Standards.



Services can be performed during construction, as part of periodic monitoring, or as specific audits.

  • Airborne Particle Testing and Certification according to ISO14644-1, at particle sizes from 0.1µm to 5.0µm using Laser Particle Counters (LPC)

  • Filter Leak Testing and Repair for ceiling, wall mounted, filter bank, or bench tested HEPA & ULPA filters using PSL or PAO challenge. If a test area is not available, we can provide a temporary Class-10 environment in which to test.

  • Airborne and Surface Microbiological Testing

  • Airflow Parallelism and Pattern Studies

  • CDA (Clean Dry Air) Testing; Oil, Moisture, Microbials, and Airborne Particles

  • Sound Testing - A Scale or Full Octave Band

  • Light Intensity and Spectrum Testing

  • Floor and Surface Conductivity Testing

  • Electromagnetic Interference (EMI) Testing

  • Certification and Service for:

    • Fume Hoods (FH), including Tracer Gas Testing

    • Laminar Flow Hoods (LFH)

    • Class-II Biological Safety Cabinets (BSC)

    • Class-III Glove Boxes

  • Client Cleanroom related SOP Creation

  • Cleanroom Design and Installation Consulting

  • Cleanroom Protocol Service and Support, including the following:

    • Protocol Development

    • Protocol Training

    • Protocol Monitoring & Auditing

    • Gown Room / Wipe-Down Room Consumables and Furnishings Management

    • Cleanroom Housekeeping Management

    • Records Management


Contact Info

Main Office
Santa Clara, CA 95050
Ph (408) 986-9600

Primary Contact: John Joseph

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