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Elementary School in Houston, Texas Reduced Air Pollutants Including Mold By 76.2%

Paul Cagle
News, Success Stories

Indoor Air Quality Impact Study: Summary

This elementary school in a Texas ISD is a 98,000 sq ft public school with 48 classrooms, various common areas and an administrative area that contains the principal’s office and a clinic room.
Prior to this air quality study, school classrooms ranged from 28% up to to 104% of the recommended limit of human exposure to air pollution*.
Average was 61% of the recommended limit of exposure to air pollution, across nine benchmark locations in the school. This is considered to be a high or very high exposure to air pollutants, especially for children.
In the first 30 days of this study, air pollutants were reduced 76.2% overall.
And in the classroom where pollutants exceeded the recommended limit, the reduction was 92.3%: from 104% down to 2%.
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Table: Reduction in Air Pollutants in First 30 Days

School Building Indoor Air Quality Study Results

* The American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE), recommends an indoor maximum exposure limit of 0.05 milligrams of pollutant per cubic meter (Mg/m3) for an annual average exposure.


Indoor Air Quality Study and Results

The King’s conducted a 95-day study of particulate matter (PM) air pollutants measured as milligrams of pollutant per cubic meter (Mg/m3). Samples were taken on three sequential dates, at a consistent time-of-day and at the same nine (9) benchmark locations within the school facility.

Following the initial collection of air pollution samples on Day 1, The King’s Operation System (TKOS) was implemented. TKOS is a comprehensive management and operation system for large facility cleaning that produces a cleaner, healthier indoor environment, often at significant cost savings.

Average reduction in air pollutants across the nine benchmark locations was 76.2% after the first 30 days of implementing TKOS, with nominal change over the following 65 days.


Up to 30% of building occupants in the U.S. suffer from chronic respiratory disorders. Reducing air pollutants by 75% or more can improve quality of life at a cost savings.


TKOS Cleaning for Health Highlights

These are the key components of TKOS, Cleaning for Health, that were implemented in this Texas ISD elementary school.

Training Camp: Four custodians are assigned by the ISD to this school and they all attended a 2-day TKOS Training Camp the week prior to January 2, 2017. Each one achieved a Certified Cleaning Worker recognition diploma.

Team (Specialist) Cleaning: During the TKOS Training Camp, personnel were trained on the four (4) specialist cleaning process and were reassigned to specific duties (instead of areas). This transition from the typical “zone/area cleaning” to a team cleaning approach requires the 2-day training camp event to unlearn the old habits and adapt to a new, more effective system.

As specialists, the scope of duties are reduced for each team member and they are trained to perform fewer functions in a larger area of work. This specialization reduces errors and improves efficiency.

Standardized Materials: Specialists are provided standardized equipment and materials for the new system. Team members are provided a Distribution Tray for each shift and a Job Card for tracking their compliance.

Vacuum Filtration: The King’s implements a 4-level filter, back pack vacuum cleaning protocol. The HEPA-Filters are emptied several times daily according to work-loaded schedules and permanent filters are cleaned weekly.

Microfiber Mops and Cloths: Mopping and dusting are performed according to strict TKOS protocols: microfiber flat mops and double sided mop bucket systems are used along with dusting with microfiber cloths and duster covers. A clearly defined laundering program for color-coded microfiber cloths and mop heads is important for the efficacy of the program.

About TKOS Consulting

TKOS is a management control system that standardizes the cleaning operation that

  • eliminates waste and labor inconsistencies
  • reduces labor costs by 10% to 30%
  • reduces supply usage up to 30% and
  • most importantly, makes indoor environments healthier by reducing air pollutants up to 75%.

The King’s Operation System (TKOS) is delivered through a consulting partnership that helps clients implement these Five Pillars of Cleaning for Health into their facility cleaning departments:

I. Process: Clients implement a process that standardizes nearly every aspect of the custodial department.

II. Training: The training room is the heartbeat of the cleaning team. TKOS teaches the “why” and the “how” of cleaning, with tools and systems designed for the cleaning worker to successfully and confidently clean for health.

III. Health: “Effective cleaning is the most fundamental activity we can employ to create healthy conditions where modern society spends the vast majority of their lives.” ─ Dr. Michael Berry (founding member of the EPA)

IV. Data Driven: TKOS helps enable the management team to generate measurable results that improve the department and provide meaningful information to the stakeholders. “You can’t manage what you can’t measure.”

V. Leadership: Our leadership team partners with our client’s leadership team to implement TKOS. We work hand in hand with managers and supervisors training them how to be more effective leaders as they learn to manage the process.

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