Expert Water Disinfection & System Hygiene

State D1 Licensed. QAL Certified. DIR Registered. Serving Bay Area mechanical and plumbing contractors since 2025

Serving all of California

49+
Projects Completed
23
Regulated & Fed Facilities
100%
First-Pass Clearance
23+
AHJ Jurisdictions
25+
Contractor Partners

Our Services

Water Line Disinfection

We perform AWWA C651 compliant domestic water main disinfection using continuous-feed and spray methods, followed by bacteriological testing through our ELAP-certified lab partner Eurofins. All work is performed by a licensed D1 operator with full documentation for AHJ sign-off and project closeout. Dechlorination is provided when chlorine residuals exceed allowable discharge thresholds.Dechlorination is provided when high PPM levels exceed the allowable threshold for sewer discharge.

High-Purity Water System Sterilization

We perform peracetic acid sterilization of high-purity water systems using Minncare, including RO and DI loops, USP Purified Water systems, pharmaceutical and biotech process piping, laboratory water systems, and dialysis water treatment systems. All sterilization is performed using validated protocols with full documentation for regulatory compliance.

Chemical Cleaning & Hydronic Passivation

We perform closed-loop hydronic system cleaning and chemical passivation for chilled water, hot water, and condenser water loops on new and retrofit installations. Services include system flushing, chemical treatment, inhibitor dosing, passivation, and MIC testing through our ELAP-certified lab partner Eurofins.

Testing and Analysis

We conduct bacteriological and chemical analysis for domestic water systems, hydronic loops, and high-purity water systems through our ELAP-certified lab partner Eurofins (ELAP #3094). Testing includes BAC-T sampling, MIC analysis, iron and inhibitor testing, and full chemical panel reporting for project turnover documentation.

VA Palo Alto Medical Center

ScopeClosed-Loop HHW Chemical Remediation
ContractorParagon Mechanical
AHJFederal / VA
CompletedMarch 2026
Chemical Remediation Federal Healthcare

Laguna Honda Hospital

ScopePotable Water Bac-T Sampling
ContractorLJ Kruse
AHJSFPUC - Water Quality Division
CompletedNovember 2025
Bac-T Sampling HCAI Healthcare

UCSF Medical Center - Mount Zion Campus

ScopePotable Water Disinfection
ContractorBellanti Plumbing
AHJHCAI (formerly OSHPD)
CompletedFebruary 2026
AWWA C651 HCAI Healthcare

Stanford Health Care - Tri-Valley GI Lab

ScopePotable Water Disinfection
ContractorLJ Kruse
AHJHCAI / City of Pleasanton
CompletedFebruary 2026
AWWA C651 HCAI Healthcare

Kaiser South San Francisco - MRI Suite

ScopePotable Water Disinfection
ContractorLJ Kruse
AHJSSF Water Quality
CompletedNovember 2025
AWWA C651 Healthcare

Kaiser Permanente WC - MRI Suite

ScopePotable Water Disinfection
ContractorLJ Kruse
AHJEBMUD
CompletedFebruary 2026
AWWA C651 Healthcare

Kaiser Permanente WC - Sanipak Area

ScopePotable Water Disinfection
ContractorLJ Kruse
AHJCity of Walnut Creek
CompletedApril 2026
AWWA C651 Healthcare

Rideout Regional Medical Center

ScopePotable Water Disinfection
ContractorCooper Oates
AHJCal Water
CompletedJanuary 2026
AWWA C651 Healthcare

SFO Airport - Air India Terminal

ScopePotable Water Disinfection
ContractorBellanti Plumbing
AHJSFO Building Inspection & SFPC
CompletedJanuary 2026
AWWA C651 Airport Authority

Bridge Point Business Park

ScopePotable Water Disinfection
ContractorEgan Plumbing
AHJCity of San Jose PBCE
CompletedMarch 2026
AWWA C651 Commercial

Carpenters Union Hall - San Francisco

ScopePotable Water Disinfection
ContractorEgan Plumbing
AHJSFPUC
CompletedApril 2026
AWWA C651

City of Martinez

ScopeWater Main Disinfection
ContractorKoios Engineering Inc
AHJCity of Martinez
CompletedMay 2026
AWWA C651 Municipal

Taube Philanthropies Gallery / Carriage House

ScopePotable Water Disinfection
ContractorEgan Plumbing
AHJCity of Redwood City
CompletedJanuary 2026
AWWA C651

Cement Masons Union

ScopePotable Water Disinfection
ContractorLJ Kruse
AHJCity of Livermore
CompletedNovember 2025
AWWA C651

International School of San Francisco

ScopePotable Water Disinfection
ContractorBellanti Plumbing
AHJSFPUC
CompletedMay 2026
AWWA C651 Educational

O'Connor Hospital - CUP Building (Phase 1A)

ScopePotable Water Disinfection
ContractorParagon Mechanical
AHJHCAI (formerly OSHPD)
CompletedJune 2026
AWWA C651 HCAI Healthcare

O'Connor Hospital - CUP Building (Phase 1B)

ScopePotable Water Disinfection
ContractorParagon Mechanical
AHJHCAI (formerly OSHPD)
CompletedJune 2026
AWWA C651 HCAI Healthcare

O'Connor Hospital - CUP Building (Phase 2)

ScopePotable Water Disinfection
ContractorParagon Mechanical
AHJHCAI (formerly OSHPD)
CompletedJune 2026
AWWA C651 HCAI Healthcare

UCSC Sinsheimer HVAC & Controls Renewal

ScopePotable Water Disinfection
ContractorGeo. H. Wilson Mechanical Contractors
AHJUCSC EH&S / Physical Plant
CompletedJuly 2026
AWWA C651 EH&S Regulated Educational

5700 Telegraph Ave - Exam Room 1

ScopePotable Water Disinfection
ContractorL.J. Kruse
AHJEast Bay Municipal Utility District (EBMUD)
CompletedJuly 2026
AWWA C651 Healthcare

5700 Telegraph Ave - Exam Room 2

ScopePotable Water Disinfection
ContractorL.J. Kruse
AHJEast Bay Municipal Utility District (EBMUD)
CompletedJuly 2026
AWWA C651 Healthcare

City of Vacaville CIP 1037

ScopeWater Main Disinfection
ContractorKoios Engineering
AHJCity of Vacaville Utilities Department
CompletedJune 2026
AWWA C651 Municipal

800 Chestnut Street

ScopePotable Water Bac-T Sampling
ContractorPribuss Engineering
AHJSFPUC
CompletedJune 2026
Bac-T Sampling

Treasure Island - Ferry Terminal

ScopePotable Water Disinfection
ContractorBellanti Plumbing, Inc.
AHJSFPUC
CompletedJuly 2026
AWWA C651 Transit

2030 N Texas Park - Fountains

ScopePotable Water Disinfection
ContractorRC Underground
AHJFairfield Public Works
CompletedJuly 2026
AWWA C651 Municipal

Jade Street Park - Fountains

ScopePotable Water Disinfection
ContractorGeo. H. Wilson
AHJCity of Capitola
CompletedJuly 2026
AWWA C651 Municipal

LLNL Bldg 492 - LCW/CHW Loops

ScopeClosed-Loop Chemical Cleaning & Passivation
ContractorN.V. Heathorn
AHJFederal / DOE / LLNL
CompletedJuly 2026
Chemical Cleaning Federal Closed-Loop LCW/CHW

Beale AFB - Dormitory Building

ScopePotable Water Disinfection
ContractorRutan Plumbing Inc.
AHJFederal / Air Force
CompletedJuly 2026
AWWA C651 Federal

Bldg. A Breakrooms / Lounge

ScopePotable Water Bac-T Sampling
ContractorACCO Engineered Systems
AHJCity of Pleasanton
CompletedJuly 2026
Bac-T Sampling

1401 Turlock Ln - Water Piping

ScopePotable Water Disinfection
ContractorSelway Construction
AHJCity of San Jose
CompletedJuly 2026
AWWA C651

Antioch Gateway West

ScopePotable Water Disinfection
ContractorN.V. Heathorn Company
AHJCity of Antioch
CompletedJuly 2026
AWWA C651

Si Se Puede - Building 1

ScopePotable Water Disinfection
ContractorGeo. H. Wilson
AHJCity of Watsonville Water Division
CompletedJuly 2026
AWWA C651

Si Se Puede - Building 2

ScopePotable Water Disinfection
ContractorGeo. H. Wilson
AHJCity of Watsonville Water Division
CompletedJuly 2026
AWWA C651

Capri Elementary School

ScopePotable Water Bac-T Sampling
ContractorRG Underground
AHJSan Jose Water Company
CompletedJuly 2026
Bac-T Sampling Educational

Cathedral - Kitchen & Restrooms

ScopePotable Water Disinfection
ContractorCity Mechanical, Inc.
AHJSFPUC
CompletedAugust 2026
AWWA C651 CPC 609.10

Pueblo Area Rehab Phase 1

ScopeWater Main Disinfection
ContractorCratus Inc.
AHJCity of Napa
CompletedAugust 2026
AWWA C651 Municipal

Charles Schwab - 1000 3rd St

ScopePotable Water Bac-T Sampling
ContractorLJ Kruse
AHJSan Francisco DBI - Plumbing Inspection
CompletedAugust 2026
Bac-T Sampling

LOSD Shoreline Middle School

ScopePotable Water Disinfection & Bac-T Sampling
ContractorGeo. H. Wilson
AHJCity of Santa Cruz Water Dept.
CompletedAugust 2026
AWWA C651 Educational Bac-T Sampling

Plum St Water Line

ScopeWater Main Disinfection
ContractorKoios Engineering Inc
AHJCity of Martinez
CompletedSeptember 2026
AWWA C651 Municipal

1111 Ferry St Water Main

ScopeWater Main Disinfection
ContractorKoios Engineering Inc
AHJCity of Martinez
CompletedSeptember 2026
AWWA C651 Municipal

885 Emerson Street

ScopePotable Water Disinfection
ContractorKDS Plumbing, Inc.
AHJCity of Palo Alto
CompletedSeptember 2026
AWWA C651 CPC 609.10

Bellarmine - Berchmans Hall

ScopePotable Water Disinfection & Bac-T Sampling
ContractorKDS Plumbing, Inc.
AHJCity of San Jose
CompletedSeptember 2026
AWWA C651 Educational Bac-T Sampling

Buck Institute for Research on Aging

ScopeDI System MinnCare Sterilization & HPC Testing
ContractorPeterson Mechanical, Inc.
AHJHigh-Purity Bio-Research Spec
CompletedSeptember 2026
MinnCare Sterilant High-Purity DI Life Sciences

Kaiser Martinez - Building 6

ScopePotable Water Bac-T Sampling
ContractorLJ Kruse
AHJCity of Martinez Water System
CompletedSeptember 2026
Bac-T Sampling Healthcare

Kaiser Pleasanton

ScopePotable Water Bac-T Sampling
ContractorLJ Kruse
AHJCity of Pleasanton (Pleasanton Water)
CompletedSeptember 2026
Bac-T Sampling Healthcare

Kaiser SF Mammo - Phase 1

ScopePotable Water Disinfection & Bac-T Sampling
ContractorLJ Kruse
AHJSan Francisco DBI
CompletedSeptember 2026
AWWA C651 CPC 609.10 Healthcare

Kaiser Antioch - Deer Valley

ScopePotable Water Bac-T Sampling
ContractorL.J. Kruse Company
AHJCity of Antioch
CompletedOctober 2026
Bac-T Sampling Healthcare

Chabot College - 4" Water Line

ScopePotable Water Disinfection
ContractorRC Underground, Inc.
AHJDSA (Division of the State Architect)
CompletedOctober 2026
AWWA C651 DSA Regulated Educational

Oyster Point Marina - Docks 1-6

ScopePotable Water Disinfection
ContractorSan Mateo County Harbor District
AHJCity of South San Francisco
CompletedOctober 2026
AWWA C651 Maritime / Marina
Logo of the California Department of Pesticide Regulation featuring blue text and a circular emblem with a green and blue design.

Qualified Applicators License #157674

The Pesticide Applicators License certifies professionals to safely apply and supervise the use of restricted pesticides in California, ensuring compliance with state regulations while protecting public health and the environment.

California Water Boards logo with blue wave design and text "California Water Boards, State Water Resources Control Board, Regional Water Quality Control Boards."

D-1 Water Distribution License #50366

The California D-1 Water Distribution License certifies professionals to operate and maintain basic water distribution systems, ensuring safe and reliable water delivery in compliance with state regulations.

Laboratory Partner

Eurofins Built Environment

ELAP Certified Laboratory #3094

All bacteriological results certified by accredited laboratory

DIR logo with 'EST. 1927' underneath inside a yellow circle.

DIR Registration #1000911400

DIR Registration #1000911400 — All PAW Solutions field work is performed in compliance with California's prevailing wage and public works requirements.

Consultation

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