CERTIFICATE OF CALIBRATION

Date:

10/28/2025

H2S Quick Check

Serial Number:

0120-1030-27139

Sensor Serial Number:

6s14966

Calibrated With:

10PPM H2S / 25PPM H2S

Cylinder Size:

116 DAL

Cylinder Contents:

116 (2 Cu.Ft.) @70 F & 500 PSIG (344Kpag)

Cylinder Lot #

25-3635

Certification:

Minor Component Certified to be +/-2%

COMPOSITION

CONCENTRATION

Hydrogen Sulfide

10PPM / 25PPM

Nitrogen

Balance

Preparation Method:

Gravimetric Balances Calibrated to N.I.S.T.

N.I.S.T. Test Number:

10 PPM

25 PPM

Calibration #1

10 | 10.4

25 | 25.3

Calibration #2

10 | 10.4

25 | 25.4

Calibration #3

10 | 10.3

25 | 25.3

Calibration Completed By:

Jose S.