Attachment 6 -Appendix 2 - Insight_Environmental_B1740_Asbestos_Contamination_Assess (002).pdf

Limited Asbestos Contamination Assessment & Testing Report

LIMITED ASBESTOS CONTAMINATION

ASSESSMENT & TESTING REPORT

DATE: September 13, 2024

ATTENTION: Corrine Holloway Toxics Program Manager

30 CES/CEIEC

SUBJECT PROPERTY: Building 1740 Fire Station 41 Vandenberg SFB, CA 93437

INTRODUCTION:

On September 9, 2024, Insight Environmental, Inc. performed a Limited Asbestos Contamination Assessment and Testing at the subject property. The purpose of this assessment was to determine if the recent improper removal performed by the fire department personnel via manual methods as part of renovation activities of non-asbestos containing ceramic floor tile with associated 5%-7% chrysotile asbestos containing black flooring mastic caused an asbestos contamination issue. Please reference Insight Environmental, Inc. Limited Asbestos Survey Report dated September 5, 2024, for more information.

This assessment was conducted by Jacob A. Quiroga, a representative of Insight Environmental, Inc. and California Division of Occupational Safety and Health (DOSH) Certified Site Surveillance Technician (CSST #19-6530) acting under the supervision of Robert S.

Augspurger, also with Insight Environmental, Inc. and California Division of Occupational Safety and Health (DOSH) Certified Asbestos Consultant (CAC #19-6515).

ASBESTOS SAMPLING SUMMARY

During the assessment/sampling, Insight Environmental, Inc. performed PLM Asbestos Dust Wipe Qualitative surface analysis and PCM air sampling. The purpose of the surface sampling was to show the presence or absence of Asbestos fibers on surfaces. The purpose of the air sampling was to verify if PCM laboratory analysis performed show less than the Environmental Protection Agency (EPA) clearance criteria for asbestos abatement projects of .01 fibers per cubic centimeter. The samples were collected and analyzed under NIOSH 7400 standard using PCM cassettes equipped with 0.8 micron filters a vacuum pump calibrated to 16 liters per minute.

All samples were collected for a minimum of 25 minutes, for a total volume of no less than 400 liters. All material samples collected from Insight Environmental, Inc. assessment was forwarded to Pinnacle Laboratory, in Lawndale California (NVLAP #600117-0).

FINDINGS:

1. The retained asbestos abatement contractor MEC Environmental, Inc. had established containment over the kitchen and dining room doorways with poly. A decontamination unit had been set up inside the dining room. Asbestos warning signage was posted to demarcate the area.

2. The majority of ceramic floor tiles had been removed and remained in the kitchen and dining room in debris piles on the floor. Personal contents including an ice machine were inside the dining room. Horizontal and floor surfaces inside the kitchen and dining room supported moderate to heavy dust collection. In the garage, light dust was present on the floor surface leading from the dining room doorway through the garage and up to the dumpster located on the driveway. Ceramic floor tile debris was observed inside the dumpster and was comingled with wood cabinetry and an oven range.

View of the removed ceramic floor tile with associated asbestos containing black mastic.

View of the dumpster shows ceramic floor tile with associated asbestos containing black mastic debris removed from the kitchen and dining room.

View of the garage looking into the contained dining room doorway.

View of the hallway looking toward the contained kitchen doorway.

3. Insight Environmental, Inc. collected seven dust wipe samples for PLM Qualitative

Analysis in the kitchen, dining room, garage and hallway in efforts to help determine the actual extent of possible asbestos contamination. Samples were analyzed by Pinnacle Laboratory using Appendix E to Subpart E of 40 CFR Part 763 and EPA/600/R-93/116 method.

A total of three samples were collected in the kitchen and dining room from the following surfaces the kitchen ceiling HVAC exhaust register (Sample 7), dining room ceiling HVAC intake register (Sample 6) and the dining room ice maker (Sample 1).

All samples revealed the absence of asbestos fibers. Additionally, three samples were taken from representative floor surfaces inside the garage and one sample was taken in the hallway also from the floor surface. The samples revealed the absence of asbestos fibers in the hallway (Sample 5). However, the presence of asbestos fibers was found in two of the three samples collected in the garage. (Sample 2 and Sample 3) collected in the garage walkway from the dining room doorway to the dumpster located on the driveway revealed the presence of Chrysotile asbestos. (Sample 4) collected in the garage by the sink and hallway area revealed the absence of asbestos fibers. See attached sample lab results for more information.

4. Two PCM air tests were performed inside the kitchen and dining room area. The samples were analyzed by Pinnacle Laboratory using NIOSH 7400 analysis method.

The PCM air tests revealed fiber concentrations of (0.005 fibers per cubic centimeter), which is considered to be less than the Environmental Protection Agency (EPA) clearance criteria for asbestos abatement projects of .01 fibers per cubic centimeter. See attached sample lab results for more details.

CONCLUSIONS & RECOMMENDATIONS:

Insight Environmental Inc. concludes that the kitchen and dining room damaged non-asbestos containing ceramic floor tile with associated asbestos containing black mastic materials was rendered non-friable. The removal was done via manual methods which did not result in damage that would be consistent with an asbestos fiber release episode causing contamination to kitchen, dining room including the remaining personal contents, HVAC system or hallway.

However, the garage foot traffic pathway from the dining room doorway up to the dumpster located on the driveway including the dumpster should be considered contaminated. The work for this project should be performed by a California licensed asbestos abatement company followed by third party post asbestos clearance assessment/testing to confirm completion of abatement before re-occupancy.

ASBESTOS ABATEMENT PLAN:

Based on our visual observations and the analytical results, Insight Environmental, Inc., recommends that all Asbestos Containing Materials that have and/or will be disturbed as part of the work for this project be removed and disposed at the subject site by a California licensed asbestos abatement company per all state and federal guidelines. Additionally, site and content contamination cleaning efforts should also be conducted by a licensed asbestos abatement company per all state and federal guidelines.

Preliminary Requirements: (The following tasks shall be completed prior to performance to avoid the potential release of asbestos contamination into the structure.

· A California qualified and licensed asbestos abatement contractor shall perform the work described, as there are specific health and safety protocols and training requirements which should be followed to prevent exposure to workers, and to prevent contamination of the site during abatement work. All work practices shall be conducted in accordance with Cal/OSHA standards and other applicable regulations. This will include the use of personal protective equipment for workers, including air purifying respirators, gloves, and protective suits. The contractor is responsible for maintaining a proper Health and Safety Plan for employees working on site.

· 6 mil polyethylene containments shall be established to isolate working areas to prevent the cross contamination of airborne asbestos fibers. All abatement work shall be performed within proper containment under negative air conditions with enclosure air exhausted outside the building. All disturbances of contaminated materials must occur within proper containment with HEPA equipped air filtration machines operating. Seal off all air supply and air return ducting in the house to prevent possible distribution of asbestos fibers throughout the system.

· Appropriate notifications to local agencies, warning signs, barricades or similar controls shall be employed to prevent access to unauthorized personnel to the work area during all abatement work. Controls shall remain in place until the area has been deemed safe as a result of post asbestos abatement sampling.

Kitchen, Dining Room, Garage and Exterior Work Area

1. A HEPA negative pressurized containment should be established to include the kitchen and dining room work area. Appropriate decontamination units should be constructed for entry/exit of workers from the abatement areas. The decontamination unit will act as an engineering control to prevent any potential cross contamination. A ten to twelve foot in width walkway path from the dining room doorway to the dumpster work area.

2. Personal contents inside the kitchen and dining room should be cleaned, packed and relocated out of the work area.

3. The kitchen, dining room and dumpster ceramic floor tile debris should be bagged using wet methods and disposed of as non-friable asbestos waste.

4. HEPA vacuum and wet wipe the cabinetry and oven range located in the dumpster free of all visible dust/debris and dispose of it as regular construction debris.

5. HEPA vacuum and wet wipe in a manner sufficient to remove all settled asbestos fibers from walls, ceilings, and floor surfaces within the kitchen and dining room contained work area. HEPA vacuum and wet wipe in a manner sufficient to remove all settled asbestos fibers from the floor surfaces within the walkway path work area.

6. HEPA vacuum and wet wipe in a manner sufficient to remove all settled asbestos fibers from the interior of the dumpster walls and floor.

POST ASBESTOS ABATEMENT SAMPLING:

Post asbestos abatement sampling and inspection should be conducted in the abatement areas including the dumpster, before containment and negative air is removed, and following the last cleaning stages to confirm the removal of surface debris and airborne asbestos fibers. This may be completed using a combination of air sampling and surface sampling. All surfaces and air space inside the work areas must be reasonably free of dust, and miscellaneous debris. The surfaces will be deemed “CLEARED” based on a “Visual Inspection” performed by Insight Environmental, Inc. The “air space” inside the containment will be deemed “CLEARED” by Insight Environmental, Inc. based on “Air Sampling” results performed by Insight Environmental, Inc.

LIMITATIONS:

The findings set forth in this survey are strictly limited to the time, date, and the scope of the evaluation. Insight Environmental, Inc. does not guarantee that all asbestos will be removed or that asbestos materials in concealed locations have been discovered or disclosed.

Robert S. Augspurger Insight Environmental, Inc.

Cal-OSHA CAC # 19-6515 805.898.1123 rob@insightenviro.com mailto:rob@insightenviro.com