District Air Quality Resources
Paramount USD has received various public records requests from the Center of Environmental Health (CEH) since July 2019 and the district has provided information indicating the HVAC services that the district has used for years.
More recently, staff scheduled a phone conference with Ms. Kaya Sugerman from the Center of Environmental Health to address updated information and the various public records requests and information dating back to July of 2019. Ms. Sugerman agreed to a phone conference which was held on August 12, 2020. Mr. Law, Mr. Frutos and Ms. Nunez participated in the conversation with Ms. Sugerman. District staff explained the process the District has used to procure HVAC services including filtration, and the details of the rationale for the district to use a company for services including filter changes. The District detailed an email with information from the Maintenance Department explaining that several years ago it was determined that district staff going on roofs to change filters created significant potentially dangerous conditions. To reduce the potential challenges to District staff, the district decided at the time to transfer the service to a contractor that was “licensed to do that kind of work”. Because of this process, the district has not procured specified filters in a manner that data could be provided to CEH. Furthermore, the district received a donation of Aeramax filters, outfitted with carbon filters to assist with the identification of odors in district locations, with no district specification for the filters in the donated units.
Staff explained to Ms. Sugerman, who was well informed and asking for various clarification points, that with the advent of Board approval of the Long Beach Grant (which provides for Merv 16 filters), and the Board direction to procure HEPA filters for the Aeramax units, the District began a process for filter procurement that will generate information in alignment with CEH requests. Ms. Sugerman mentioned that she understood that once the District procures the various filters, specific information regarding the procured filters will be able to be provided to CEH.
The District assured Ms. Sugerman that once the procurement is Board approved, the details of the various filters procured will be provided to Ms. Sugerman at CEH. From the conversation, Ms. Sugerman mentioned that she understood that the district had done in years past and that she was interested in the information provided once we had the necessary approvals. As recent questions from a Board member's PRA are in essence those provided with responses to the prior inquiries from CEH (both 2014-date and 2016-date), the information is detailed again for response and clarification:
----time period beginning January 2014 through the present:
- All invoices and receipts for school HVAC system replacement filters purchased by the PUSD and PUSD schools. The District procures HVAC maintenance services which include the provision of filters, but separate filters for our HVAC units are not typically procured by the District.
- All documents with information about filters used in PUSD HVAC systems and portable air purification systems, with sufficient information to determine the type of filter, product name, brand, supplier, SKU, and all other product identifiers. The District does not purchase portable air purification systems; however, we have carbon filters for donated Aeramax units.
MINUTES - Environmental Committee Meeting (MAY 27, 2021)
All indoor Cr(VI) air levels measured at both school sites ranging from were well below the South Coast Air Quality Management District (SCAQMD) long-term health risk level of 0.0002 micrograms per cubic meter (μg/m3)
Indoor Cr(VI) air levels measured at Gaines ranged from Not DetectedJ to 0.0000336 micrograms per cubic meter (μg/m3) were well below the City of Paramount stationary monitor result for the period of September 26 to 29, 2018, which ranged from 0.00015 to 0.00016 μg/m3 for the 2, 24- hour samples collected and analyzed.
The outdoor Cr(VI) air levels measured at Gaines was 0.000103 μg/m3 and was below the City of Paramount stationary monitor result for the period of September 26 to 29, 2018, which ranged from 0.00015 to 0.00016 μg/m3 for the 2, 24-hour samples collected and analyzed.
Indoor Cr(VI) air levels measured at Lincoln ranged from Not Detected to 0.0000559 μg/m3 were below the SCAQMD stationary monitor result for the period of September 23 to 29, 2018, which ranged from 0.00006 to 0.00022 μg/m3 for the 2, 24-hour samples collected and analyzed.
The outdoor Cr(VI) air levels measured at Lincoln was 0.0000457 μg/m3 and was below the SCAQMD stationary monitor result for the period of September 23 to 29, 2018, which ranged from 0.00006 to 0.00022 μg/m3 for the 2, 24-hour samples collected and analyzed.
No airborne Cr(VI) was detected above the OEHHA NSRL inside any of the classrooms during the 24 hours of sampling. One exterior sample collected on the Roof of Gaines Room 1, exceeded the OEHHA NSRL. 0.00148 micrograms (μg) Cr(VI) as compared to the OEHHA NSRL of 0.001 μg was detected in the ambient outdoor air from air pollution from local manufacturing during the same sampling period that Classroom 1 was monitored. This is suggestive of an exterior ambient air issue in the vicinity of Gaines. The outdoor levels measured at Lincoln were 0.000638 μg, below the OEHHA NSRL.
All Cr(VI) air levels are well below occupational exposure levels established by California Division of Occupational Safety and Health (DOSH -- better known as Cal/OSHA) and other consensus levels such as American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value and National Institute of Occupational Safety and Health (NIOSH) Recommended Exposure Level.
All Cr(VI) air levels (level measured and Limit of DetectionM) were a magnitude of 4 to 15 times the California Department of Toxic Substances Control (DTSC) Office of Human and Ecological Risk (HERO) Screening LevelsN, (hereafter, DTSC-SLs). It is noted that all of the outdoor samples collected at school sites from December 21, 2016 through March 26, 2019, measured by both the City of Paramount and the SCAQMD were in excess of the DTSC-SLP. These levels in excess of the DTSC-SL are suggestive of a need for on-going further investigation and a quantitative baseline risk assessment. It is also noted that the Limit of Detection (LOD) for the method used is greater than the DTSC-SL which introduces limitations to the assessment and suggests the need to determine if a method with a LOD below the DTSC-SL can be developed.
No airborne Hexavalent Chromium (Cr(VI)) was detected inside any of the classrooms during the five days of sampling. Small quantities of Cr(VI) were detected in the ambient outdoors air from air pollution from local manufacturing during the same sampling period that classrooms were monitored.
Cr(VI) results inside the classrooms were below the limit of detection and below the OEHHA NSRL for inhalation of 0.001 μg/m3. Outdoor levels measured ranged from less than 0.39 to 0.40 μg/m3. Additionally, these levels are well below occupational exposure levels established by California Division of Occupational Safety and Health (DOSH -- better known as Cal/OSHA) as referenced in the report underTable I. (Sept/2017)
From: Charlene Contreras [mailto:[email protected]]
Sent: Wednesday, February 21, 2018 2:26 PM
To: John Carver
Cc: John Moreno
Subject: RE: indoor air sampling results
I apologize for the delay on the indoor air sampling results. I am trying to sort through some logistical issues but I don’t anticipate too much longer.
As for hair sampling of children in Paramount, I contacted Jane Williams, and she is not aware of any such study. We at DPH haven’t heard of a hair study either.
Charlene Contreras, R.E.H.S.
Environmental Health Manager
Los Angeles County Dept. of Public Health
5050 Commerce Drive
Baldwin Park, CA 91706
Note: Charlene Contreras is an Area Manager for the Los Angeles County Department of Public Health
Jane Williams is the Executive Director of California Communities Against Toxics
ATTACHED DOCUMENTS AREA:
- Quality HVAC
- Control of Moisture/Humidity
- Integrated Pest Management (IPM)
- Effective Cleaning and Maintenance
- Smart Materials Selection
- Aggressive Source Control
- Integrated Energy Management Solutions
Indoor Air Quality Design Tools for PUSD
Preliminary Design Phases
Controlling Pollutants and Sources
Heating, Ventilation and Air-Conditioning (HVAC) Systems
Renovation and Repair of Existing Schools
Operations and Maintenance
Portable (Relocatable) Classrooms