OHA Drinking Water Services
OR41
PWS ID: 01542 ---- LAKE OSWEGO - TIGARD WATER SUPPLY

Required Operators
Treatment Level 4
  • Oregon Administrative Rule:
    333-061-0235 OPERATOR REQUIREMENTS LEVELS 1-4
  • Requirements:
    Currently a Level 3 operator AND one of below: HS/GED, 2 yrs relevant post-high school, and 6 yrs experience with 3 yrs of ODM;
    OR
    HS/GED, 3 yrs relevant post-high school, and 5 yrs experience with 2.5 yrs of ODM;
    OR
    HS/GED, 4 yrs relevant post-high school, and 4 yrs experience with 2 yrs of ODM
Name Distribution
Level
Treatment
Level
Filtration
Endorsement
Small Water
Certification
BAT
Certification
CCS
Certification
CCB # LCB # Phone
Number
Email Expiration
Dates
Sort DRC
Robert J. Blezinski D2-2026T4-2026FE-2026


503-635-0394 bblezinski@ci.oswego.or.us 12/31/2026 (D/T) 0
Ryan A. Hepler D4-08112T4-7211FE-0081

CCS-007211503-841-4221 rhepler@ci.oswego.or.us 12/31/2026 (D/T)
12/31/2026 (CCS)
0
Phil J. Bonsi
T4-08176FE-008176


503-799-8692 philipbonsi@gmail.com 12/31/2026 (T) 0
Cole E. Trusty D2-09107T4-09106FE-0130


503-635-0394 ctrusty@ci.oswego.or.us 12/31/2027 (D/T) 0
Adam M. Brensen
T4-889652


503-635-0394 abrensen@ci.oswego.or.us 12/31/2026 (T) 0
Timothy P Reese
T4-625236FE-625236


503-635-0394 treese@ci.oswego.or.us 12/31/2027 (T) 0
Jason L. Hoye D2-271471T2-271471FE-271471


503-675-3747 jhoye@ci.oswego.or.us 12/31/2026 (D/T) 0
Chris E. Warren D3-152023T4-152023

CCS-152023503-534-5435 cwarren@ci.oswego.or.us 12/31/2027 (D/T)
12/31/2027 (CCS)
0
Dave Trotter D4-58778T4-058778
DRC



503-635-0392 dtrotter@ci.oswego.or.us 12/31/2027 (D/T) 2
Roxanne J. Edgar
T2-262586


503-703-0827 redgar@ci.oswego.or.us 12/31/2026 (T) 0
Warner A. Schrack
T1-521435


503-502-1527 schrackwarner@gmail.com 12/31/2027 (T) 0


Abbreviations:  BAT = Backflow Assembly Tester, CCS = Cross Connection Specialist, D = Distribution, DRC = Direct Responsible Charge, OIT = Operator in Training, SWS = Small Water System, T = Treatment

DRCs are marked in bold and listed first.