September 27, Ted Sherman Saint Paul Public Schools 360 Colborne Street St. Paul, MN Dear Ted:

Transcription

1 September 27, 2007 Ted Sherman Saint Paul Public Schools 360 Colborne Street St. Paul, MN Dear Ted: Enclosed please find two (2) copies of the Hazel Park Middle School Summer 2007 Asbestos Removal, IEA Project #2001/01390 Final Report. One of these copies should be maintained with the Individual Building s AHERA Recordkeeping System and the other with the District s AHERA Recordkeeping System. Samples are retained by IEA for thirty (30) days after submission of IEA s Final Report to the client and will be disposed of unless otherwise instructed by the client. If there is anything we can do to assist with the preparation/design of any abatement you are considering for the future, please do not hesitate to contact me. Sincerely, Brenda Fischer Senior Project Manager BF/wb Enclosures cc File O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

2 - Final Report Hazel Park Middle School Summer 2007 Asbestos Removal 1140 White Bear Avenue St. Paul, MN Saint Paul Public Schools September 22, 2007 IEA Project No. 2001/01390 O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

3 Project Summary IEA Project No. 2001/01390 Hazel Park Middle School Start Date: June 13, 2007 No. of Phases: Four Completion Date: June 22, 2007 Reason for Response Action: Planned Removal Project Management Provided By: IEA Project Manager: Brenda Fischer IEA On-Site Monitor(s)/Accreditation No.: (See Appendix F for qualifications) Scott Lodico AS1539 Response Action Conducted By: Contractor Name: Twell Environmental, Inc. Contractor License No.: AC592 Project Manager: Lee Tufvander Site Supervisor(s): (See Appendix D for license/certificate/medical) Ron Hyska Were specifications/project design developed? No Preliminary Activities The contractor supplied IEA with submittals including all licenses, permits, certification, insurance policies, schedules and plans. This project was regulated and required notification to the state. Contractor s notification and amendments (if applicable) and the Asbestos-Related Work Project Permit are included in Appendix C. The air monitoring notification is included in Appendix F. Waste Disposal All asbestos-containing debris was stored in a secure area until transported to SKB Rosemount Industrial Waste Facility, Courthouse Blvd., Rosemount, Minnesota, A waste disposal manifest is located in Appendix E. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

4 Table of Contents Appendix A... Final Reports Appendix B... Air Monitoring Methodology Certificate of Visual Inspection Clearance Air Sampling Sign-In Sheet Certificate of Air Clearance Laboratory Analysis Appendix C... Contractor s License Contractor s Insurance Certificate(s) Contractor s State Notification and Amendments (if applicable) Contractor s Asbestos-Related Work Project Permit Appendix D... Contractor s Daily Sign-In Sheet(s) Contractor s Daily Log(s) Contractor s Enclosure Sign-In Sheet(s) (if applicable) Worker s Certificates/Licenses/Medical Appendix E... Landfill Manifest(s) Appendix F... On-Site Monitor Qualifications Air Monitoring Notification Appendix G... Incident Report(s) O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

5 Appendix A Final Reports O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

6 IEA Project No. 2001/01390 Phase No.: 1 Response Start Date: June 14, 2007 Response Completion Date: June 19, 2007 Location: Rooms 209 & 211 Type of Containment: Full Enclosure Material Description Material Type Asbestos Content Amount Response Action 9 x 9 Vinyl Floor Tile & Mastic Assumed 1,904 square feet Removal Millboard Pipe Insulation & Associated Fittings Assumed 12 linear feet Removal Response Stages I. Pre-Abatement Activities The contractor developed a site-specific (9 point) asbestos abatement plan. Baseline cleaning was performed prior to construction of protective barriers pursuant to MDH Rules , Items A to E. Protective barriers were used to lock out all ventilation systems, doors, windows, permanent fixtures and any other openings. Polyethylene was constructed along all walls. A five (5)-stage decontamination unit was constructed contiguous to the work area. A one (1)-stage bag-out unit was constructed. The HVAC system was shut down and locked out. Warning signs were posted at all access points. II. Abatement Activities The containment area was 17,766 cubic feet. A recording manometer was set up and monitored throughout the project. The enclosure was maintained at a pressure differential of (inches of water). This was accomplished with three (3) HEPA unit(s) rated at 2,000 cubic feet per minute. There were approximately fifteen (15) air exchanges per hour within the enclosure. A visual inspection was made of the enclosure prior to removal to verify its integrity and evaluate the direction of air flow. All applicable posting requirements were met. Entrance to and exit from the work area was observed to ensure that the appropriate personal protective equipment was worn and decontamination procedures were followed. Visual monitoring of work practices was accomplished by observation from inside the enclosure during removal and cleanup. The asbestos-containing material was saturated with amended water prior to removal from the substrate. The removed asbestos-containing material was immediately placed into appropriately labeled disposal bags and/or drums before it was allowed to dry. All debris was cleaned up at the end of each shift. Periodic inspections were conducted for damage or penetration of the barriers in order to maintain the integrity of the containment area. HEPA-filtered pressure differential unit(s) were inspected for proper functioning and cleanliness of pre-filters. Asbestos-containing mastic (adhesive) was removed using chemical solvents. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

7 III. Decontamination & Disposal A final cleaning was conducted using HEPA-filtered vacuums and wet methods. All asbestos-containing material and contaminated debris was properly sealed in double 6-mil labeled bags or in sealed drums. Four (4) bags and eighteen (18) barrels of containerized debris /were decontaminated, removed from the enclosure and stored in a locked storage area. A final inspection was conducted of the containment area on June 18, 2007, by Scott Lodico. All surfaces were checked to ensure that no dust and/or debris remained. IV. Clearance Procedures After sufficient air exchanges, IEA initiated an aggressive air sampling protocol as required by the MDH Rules , Subpart 2, Item F, Subitems 1 to 3, which was accomplished as follows: One (1) one-horsepower leaf blower(s) was utilized to sweep all surfaces in the containment area. Two (2) twenty-inch box fan(s) were placed approximately two meters from the floor, to circulate the air upward. (One fan for each 10,000 cubic feet.) V. Air Quality A. Outside the Enclosure Two (2) ambient air samples were collected simultaneously no less than once during every zero to five (0-5)-hour period while asbestos-related work occurred. At least one (1) sample was collected within ten feet (10 ) of the decontamination unit. Laboratory analysis of the ambient air sample(s) indicated levels less than or equal to 0.01 f/cc, or the alternative indoor air standard. Details of actual analytical results are located in Appendix B. B. Clearance Sampling TEM analysis was utilized for all clearance air samples taken. Five (5) high volume pumps were placed inside the enclosure in a pattern designed to ensure representative sampling of the area. All samples were taken simultaneously using aggressive sampling techniques. Laboratory analysis of clearance air samples indicated levels greater than 0.01 f/cc or 70 structures per square millimeter (s/mm 2 ), the specified clearance level, indicating failure of clearance air samples. As soon as these results were obtained, the Contractor was instructed to clean the area utilizing wet methods and HEPA-filtered vacuums. Re-sampling was performed, and laboratory analysis indicated levels less than or equal to 0.01 f/cc or 70 s/mm 2, the specified clearance level. See Appendix G for incident report. All air sampling and analysis was conducted in a manner consistent with all applicable codes and regulations by IEA. All laboratory results are located in Appendix B. VI. Project Closeout After clearance was achieved, the temporary enclosure barriers were removed in accordance with specifications and disposed of as asbestos-contaminated debris. All equipment and materials were removed from the area. An inspection was conducted of the area for damages and a punch list was compiled. The contractor is responsible for addressing all punch list items prior to receiving final payment. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

8 IEA Project No. 2001/01390 Phase No.: 2 Response Start Date: June 19, 2007 Response Completion Date: June 22, 2007 Location: Rooms 213, 215 & 217 Type of Containment: Full Enclosure Material Description Material Type Asbestos Content Amount Response Action 9 x 9 Vinyl Floor Tile & Mastic Assumed 2,856 square feet Removal Millboard Pipe Insulation & Associated Fittings Assumed 15 linear feet Removal Response Stages I. Pre-Abatement Activities The contractor developed a site-specific (9 point) asbestos abatement plan. Baseline cleaning was performed prior to construction of protective barriers pursuant to MDH Rules , Items A to E. Protective barriers were used to lock out all ventilation systems, doors, windows, permanent fixtures and any other openings. Polyethylene was constructed along all walls. A five (5)-stage decontamination unit was constructed contiguous to the work area. A one (1)-stage bag-out unit was constructed. The HVAC system was shut down and locked out. Warning signs were posted at all access points. II. Abatement Activities The containment area was 27,069 cubic feet. A recording manometer was set up and monitored throughout the project. The enclosure was maintained at a pressure differential of (inches of water). This was accomplished with three (3) HEPA unit(s) rated at 2,000 cubic feet per minute. There were approximately ten (10) air exchanges per hour within the enclosure. A visual inspection was made of the enclosure prior to removal to verify its integrity and evaluate the direction of air flow. All applicable posting requirements were met. Entrance to and exit from the work area was observed to ensure that the appropriate personal protective equipment was worn and decontamination procedures were followed. Visual monitoring of work practices was accomplished by observation from inside the enclosure during removal and cleanup. The asbestos-containing material was saturated with amended water prior to removal from the substrate. The removed asbestos-containing material was immediately placed into appropriately labeled disposal bags and/or drums before it was allowed to dry. All debris was cleaned up at the end of each shift. Periodic inspections were conducted for damage or penetration of the barriers in order to maintain the integrity of the containment area. HEPA-filtered pressure differential unit(s) were inspected for proper functioning and cleanliness of pre-filters. Asbestos-containing mastic (adhesive) was removed using chemical solvents. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

9 III. Decontamination & Disposal A final cleaning was conducted using HEPA-filtered vacuums and wet methods. All asbestos-containing material and contaminated debris was properly sealed in double 6-mil labeled bags or in sealed drums. Eight (8) bags and thirty-four (34) barrels of containerized debris were decontaminated, removed from the enclosure and stored in a locked storage area. A final inspection was conducted of the containment area on June 21, 2007, by Scott Lodico. All surfaces were checked to ensure that no dust and/or debris remained. IV. Clearance Procedures After sufficient air exchanges, IEA initiated an aggressive air sampling protocol as required by the MDH Rules , Subpart 2, Item F, Subitems 1 to 3, which was accomplished as follows: One (1) one-horsepower leaf blower(s) was utilized to sweep all surfaces in the containment area. Three (3) twenty-inch box fan(s) were placed approximately two meters from the floor, to circulate the air upward. (One fan for each 10,000 cubic feet.) V. Air Quality A. Outside the Enclosure Two (2) ambient air samples were collected simultaneously no less than once during every zero to five (0-5)-hour period while asbestos-related work occurred. At least one (1) sample was collected within ten feet (10 ) of the decontamination unit. Laboratory analysis of the ambient air sample(s) indicated levels had exceeded 0.01 f/cc or the alternative indoor air standard. It was suspected that the elevated fiber concentrations originated from non-asbestos dust in the air. Minnesota PCM equivalency analysis via TEM of elevated samples indicated levels less than or equal to 0.01 f/cc, or the alternative indoor air standard. Details of actual analytical results are located in Appendix B. An incident report was completed and is included in Appendix G. B. Clearance Sampling TEM analysis was utilized for all clearance air samples taken. Five (5) high volume pumps were placed inside the enclosure in a pattern designed to ensure representative sampling of the area. All samples were taken simultaneously using aggressive sampling techniques. Laboratory analysis of clearance air samples indicated levels less than or equal to 0.01 f/cc or 70 structures per square millimeter (s/mm 2 ), the specified clearance level. All air sampling and analysis was conducted in a manner consistent with all applicable codes and regulations by IEA. All laboratory results are located in Appendix B. VI. Project Closeout After clearance was achieved, the temporary enclosure barriers were removed in accordance with specifications and disposed of as asbestos-contaminated debris. All equipment and materials were removed from the area. An inspection was conducted of the area for damages and a punch list was compiled. The contractor is responsible for addressing all punch list items prior to receiving final payment. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

10 IEA Project No. 2001/01390 Phase No.: 3 Response Start Date: June 21, 2007 Response Completion Date: June 21, 2007 Location: Room 210 Type of Containment: Critical Barrier Material Description Material Type Asbestos Content Amount Response Action 9 x 9 Vinyl Floor Tile & Mastic Assumed 276 square feet Removal Response Stages I. Pre-Abatement Activities Baseline cleaning was performed prior to construction of protective barriers. (This cleaning was conducted in compliance with Section of AHERA.) Critical barriers were used to lock out all ventilation systems, doors, windows, permanent fixtures and any other openings. Polyethylene splash guards were constructed along all walls. A five (5)-stage decontamination unit was constructed contiguous to the work area. The HVAC system was shut down and locked out. Warning signs were posted at all access points. II. Abatement Activities The containment area was 2,208 cubic feet. A recording manometer was set up and monitored throughout the project. The containment was maintained at a pressure differential of (inches of water). This was accomplished with one (1) HEPA unit(s) rated at 2,000 cubic feet per minute. There were approximately forty-one (41) air exchanges per hour within the enclosure. A visual inspection was made of the enclosure prior to removal to verify its integrity and evaluate the direction of air flow. All applicable posting requirements were met. Entrance to and exit from the work area was observed to ensure that the appropriate personal protective equipment was worn and decontamination procedures were followed. Visual monitoring of work practices was accomplished by observation from inside the enclosure during removal and cleanup. The asbestos-containing material was saturated with amended water prior to removal from the substrate. All removal was completed in a nonfriable manner. The removed asbestos-containing material was immediately placed into appropriately labeled disposal bags and/or drums before it was allowed to dry. All debris was cleaned up at the end of each shift. Periodic inspections were conducted for damage or penetration of the barriers in order to maintain the integrity of the containment area. HEPA-filtered pressure differential unit(s) were inspected for proper functioning and cleanliness of pre-filters. Asbestos-containing mastic (adhesive) was removed using chemical solvents in a nonfriable manner. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

11 III. Decontamination & Disposal A final cleaning was conducted using HEPA-filtered vacuums and wet methods. All asbestos-containing material and contaminated debris was properly sealed in double 6-mil labeled bags or in sealed drums. Three (3) bags and two (2) barrels of containerized debris were decontaminated, removed from the enclosure and stored in a locked storage area. A final inspection was conducted of the containment area on June 21, 2007, by Scott Lodico. All surfaces were checked to ensure that no dust and/or debris remained. IV. Air Quality A. Outside the Enclosure Two (2) ambient air samples were collected simultaneously no less than once during every zero to five (0-5)-hour period while asbestos-related work occurred. At least one (1) sample was collected within ten feet (10 ) of the decontamination unit and at the entrance to the work area. Laboratory analysis of the ambient air sample(s) indicated levels less than or equal to 0.01 f/cc, or the alternative indoor air standard. Details of actual analytical results are located in Appendix B. B. Clearance Sampling Although the asbestos-containing material was removed in a nonfriable manner, five (5) high-volume pumps were placed inside the enclosure, in a pattern designed to ensure representative sampling of the area, and air samples were analyzed by PCM (Phase Contrast Microscopy) for precautionary reasons only. Laboratory analysis of clearance samples indicated levels less than or equal to 0.01 f/cc, the specified clearance level. All samples were taken simultaneously. All air sampling and analysis was conducted in a manner consistent with all applicable codes and regulations by IEA. All laboratory results are located in Appendix B. V. Project Closeout After the non-friable removal was complete or clearance air was achieved, the temporary enclosure barriers were removed and disposed of as asbestos-contaminated debris. All equipment and materials were removed from the area. An inspection was conducted of the area for damages and a punch list was compiled. The contractor is responsible for addressing all punch list items prior to receiving final payment. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

12 IEA Project No. 2001/01390 Phase No.: 3 Response Start Date: June 22, 2007 Response Completion Date: June 22, 2007 Location: Room 210 Type of Containment: Glove Bag Material Description Material Type Asbestos Content Amount Response Action Millboard Pipe Insulation & Associated Fittings Assumed 3 linear feet Removal Response Stages I. Pre-Abatement Activities The regulated area and worker protection requirements were met. Local area protection consisted of: Danger signs at all access points. A drop sheet extending 6 to 10 feet beyond the work area. Shutting off or sealing off HVAC vents in the work area. II. Abatement Activities Workers donned protective suits and respirators. Existing dust and debris was pre-cleaned from the work area. A remote three (3)-stage decontamination unit was constructed near the work area. An inspection was made to assess the integrity of the glove bag(s). The asbestos-containing material was saturated with amended water, removed and placed into the bottom of the glove bag. The substrate was cleaned of all residue and encapsulated. After rinsing all debris to the bottom of the glove bag and removing the tools, the glove bag was deflated with a HEPA-filtered vacuum, twisted near the top and taped to contain the debris in the bottom. The bag was then cut down and placed directly into a labeled disposal bag. All protective barriers were removed and proper decontamination procedures were followed. The workers suits and the drop sheet were also put into the disposal bag. III. Decontamination & Disposal A final inspection was conducted of the glovebag location(s) on June 22, 2007, by Scott Lodico. All surfaces were checked to ensure that no dust and/or debris remained. One (1) bag of containerized debris to include drop cloths, disposable suits, etc. was decontaminated, removed from the work area and stored in a locked storage area. IV. Air Quality A. Duration Samples A minimum of two (2) air samples were taken within ten feet (10 ) of the glove bag operation and analyzed by PCM. Laboratory analysis of the ambient air sample(s) indicated levels that were less than or equal to 0.01 f/cc or alternative indoor air standard. Details of actual analytical results are located in Appendix B. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

13 The air sampling and analysis was conducted in a manner consistent with all applicable codes and regulations by IEA. All laboratory results are located in Appendix B. V. Project Closeout After the material was removed, the glove bag operation was complete, if the duration air sample was less than or equal to 0.01 f/cc, or the alternative indoor air standard. All equipment and materials were removed from the area. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

14 IEA Project No. 2001/01390 Phase No.: 4 Response Start Date: June 21, 2007 Response Completion Date: June 22, 2007 Location: Room 114 Type of Containment: Critical Barrier Material Description Material Type Asbestos Content Amount Response Action 9 x 9 Vinyl Floor Tile & Mastic Assumed 276 square feet Removal Response Stages I. Pre-Abatement Activities Baseline cleaning was performed prior to construction of protective barriers. (This cleaning was conducted in compliance with Section of AHERA.) Critical barriers were used to lock out all ventilation systems, doors, windows, permanent fixtures and any other openings. Polyethylene splash guards were constructed along all walls. A three (3)-stage decontamination unit was constructed contiguous to the work area. The HVAC system was shut down and locked out. Warning signs were posted at all access points. II. Abatement Activities The containment area was 2,208 cubic feet. A recording manometer was set up and monitored throughout the project. The containment was maintained at a pressure differential of (inches of water). This was accomplished with one (1) HEPA unit(s) rated at 2,000 cubic feet per minute. There were approximately forty-one (41) air exchanges per hour within the enclosure. A visual inspection was made of the enclosure prior to removal to verify its integrity and evaluate the direction of air flow. All applicable posting requirements were met. Entrance to and exit from the work area was observed to ensure that the appropriate personal protective equipment was worn and decontamination procedures were followed. Visual monitoring of work practices was accomplished by observation from inside the enclosure during removal and cleanup. The asbestos-containing material was saturated with amended water prior to removal from the substrate. All removal was completed in a nonfriable manner. The removed asbestos-containing material was immediately placed into appropriately labeled disposal bags and/or drums before it was allowed to dry. All debris was cleaned up at the end of each shift. Periodic inspections were conducted for damage or penetration of the barriers in order to maintain the integrity of the containment area. HEPA-filtered pressure differential unit(s) were inspected for proper functioning and cleanliness of pre-filters. Asbestos-containing mastic (adhesive) was removed using chemical solvents in a nonfriable manner. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

15 III. Decontamination & Disposal A final cleaning was conducted using HEPA-filtered vacuums and wet methods. All asbestos-containing material and contaminated debris was properly sealed in double 6-mil labeled bags or in sealed drums. Three (3) bags and two (2) barrels of containerized debris were decontaminated, removed from the enclosure and stored in a locked storage area. A final inspection was conducted of the containment area on June 22, 2007, by Scott Lodico. All surfaces were checked to ensure that no dust and/or debris remained. IV. Air Quality A. Outside the Enclosure Two (2) ambient air samples were collected simultaneously no less than once during every zero to five (0-5)-hour period while asbestos-related work occurred. At least one (1) sample was collected within ten feet (10 ) of the decontamination unit. Laboratory analysis of the ambient air sample(s) indicated levels less than or equal to 0.01 f/cc, or the alternative indoor air standard. Details of actual analytical results are located in Appendix B. B. Clearance Sampling Although the asbestos-containing material was removed in a nonfriable manner, five (5) high-volume pumps were placed inside the enclosure, in a pattern designed to ensure representative sampling of the area, and air samples were analyzed by PCM (Phase Contrast Microscopy) for precautionary reasons only. Laboratory analysis of clearance samples indicated levels less than or equal to 0.01 f/cc, the specified clearance level. All samples were taken simultaneously. All air sampling and analysis was conducted in a manner consistent with all applicable codes and regulations by IEA. All laboratory results are located in Appendix B. V. Project Closeout After the non-friable removal was complete or clearance air was achieved, the temporary enclosure barriers were removed and disposed of as asbestos-contaminated debris. All equipment and materials were removed from the area. An inspection was conducted of the area for damages and a punch list was compiled. The contractor is responsible for addressing all punch list items prior to receiving final payment. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

16 IEA Project No. 2001/01390 Phase No.: 4 Response Start Date: June 22, 2007 Response Completion Date: June 22, 2007 Location: Room 114 Type of Containment: Glove Bag Material Description Material Type Asbestos Content Amount Response Action Millboard Pipe Insulation & Associated Fittings Assumed 18 linear feet Removal Response Stages I. Pre-Abatement Activities The regulated area and worker protection requirements were met. Local area protection consisted of: Danger signs at all access points. A drop sheet extending 6 to 10 feet beyond the work area. Shutting off or sealing off HVAC vents in the work area. II. Abatement Activities Workers donned protective suits and respirators. Existing dust and debris was pre-cleaned from the work area. A remote three (3)-stage decontamination unit was constructed near the work area. An inspection was made to assess the integrity of the glove bag(s). The asbestos-containing material was saturated with amended water, removed and placed into the bottom of the glove bag. The substrate was cleaned of all residue and encapsulated. After rinsing all debris to the bottom of the glove bag and removing the tools, the glove bag was deflated with a HEPA-filtered vacuum, twisted near the top and taped to contain the debris in the bottom. The bag was then cut down and placed directly into a labeled disposal bag. All protective barriers were removed and proper decontamination procedures were followed. The workers suits and the drop sheet were also put into the disposal bag. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

17 III. Decontamination & Disposal A final inspection was conducted of the glovebag location(s) on June 22, 2007, by Scott Lodico. All surfaces were checked to ensure that no dust and/or debris remained. Three (3) bags of containerized debris to include drop cloths, disposable suits, etc. were decontaminated, removed from the work area and stored in a locked storage area. IV. Air Quality A. Duration Samples A minimum of two (2) air samples were taken within ten feet (10 ) of the glove bag operation and analyzed by PCM. Laboratory analysis of the ambient air sample(s) indicated levels that were less than or equal to 0.01 f/cc or alternative indoor air standard. Details of actual analytical results are located in Appendix B. B. Clearance Samples Clearance sampling was performed using five (5) high volume pumps within ten feet (10 ) of the glove bag operation. PCM laboratory analysis indicated levels less than or equal to 0.01 f/cc, the specified clearance level. The air sampling and analysis was conducted in a manner consistent with all applicable codes and regulations by IEA. All laboratory results are located in Appendix B. V. Project Closeout After clearance was achieved, the temporary barriers were removed in accordance with specifications and disposed of as asbestos-contaminated debris. All equipment and materials were removed from the area. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

18 Appendix B Air Monitoring Methodology Certificate of Visual Inspection Clearance Air Sampling Sign-In Sheet Certificate of Air Clearance Laboratory Analysis O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

19 Project Air Monitoring General office. The IEA field staff receives in-house training for air monitoring. The training is conducted by in-house staff, who are graduates of the NIOSH 582 course. Emphasis in the IEA air monitoring program is placed on good industrial hygiene sampling practices, sample names, analytical limits of quantification, time-weighted averages, equipment use and sampling strategies. Phase Contrast Microscopy Sampling Strategy. Air samples are collected on 25 millimeter mixed cellulose ester filters with a nominal pore size of 0.8 microns. These filters are used on conductive air sampling cassettes with 50 millimeter extension cowls. The cassettes are connected to highvolume sampling pumps via flexible plastic tubing. The tubing is suspended from a stand so that the cassette angles downward at 45 degrees from vertical, approximately four feet above the floor. Cassettes are positioned in areas representative of the conditions being monitored, away from walls, furniture and obstructions. Prior to commencement of sampling, pumps are calibrated by rotameter to flow rates between 4 and 12 liters per minute, depending upon conditions. Cassettes are opened and pumps are activated and allowed to run for sufficient time to sample a desired volume of air. For background and clearance sampling, five samples of a minimum of 1,200 liters each are normally drawn for the first 25,000 square feet of area, plus one sample for each additional 5,000 square feet. During each five (5) hour shift of abatement work, two samples of a minimum of 1,200 liters of air each are normally collected outside the work area within 10 feet of the containment barriers. For each set of samples, a minimum of two field blanks are forwarded to the laboratory. Field blanks are cassettes which are opened for 30 seconds within the area being monitored. Unexposed filters from each new set of cassettes received at the laboratory are analyzed to establish filter background levels. Analysis Methodology A pie wedge shaped section of the filter paper (1/6 to 1/4 of total filter) is mounted on a clear glass microscope slide. The paper is cleared using acetone vapor and fixed using three to seven microliters of glyceryl triacetate; a #1.5 cover glass is then placed on top of the preparation. IEA uses the NIOSH 7400 method for fiber counting procedures. Briefly, fibers are particulates longer than 5 microns with a length to width ratio equal to or greater than 3:1. Ends of fibers which fall within a defined portion of the field of view are counted. Between 20 and 200 fields are counted, depending on the number of fibers present. Calculations use the number of fibers counted, effective collection area of the filter paper, volume of air collected, area of counting field, and a dimensional correction factor; results are in fibers per cubic centimeter o f air. IEA uses either an Olympus Model CH-30/CH-20 or Nikon Model Alphaphot-2, YS2 microscope equipped with a 40X phase contrast objective, appropriate phase contrast condenser, and a Walton-Beckett reticule in a 10X eyepiece; total magnification is 400X. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

20 Quality assurance and quality control practices are performed regularly by analysts at IEA. For fiber counting, a Koehler illumination check is made once a day. Duplicate counts of one sample or 10% of the day's samples (whichever is greater) are performed. The asbestos analytical laboratory at IEA is a successful participant in the National Institute for Occupational Safety and Health Proficiency Analytical Testing Program (Lab #010102; latest test results available upon request). Transmission Electron Microscopy Sampling Strategy Air samples are collected on 25 millimeter mixed cellulose ester filters with a nominal pore size of 0.45 microns. These filters are used in conductive air sampling cassettes with 50 millimeter extension cowls. The ca ssettes are connected to highvolume sampling pumps via flexible plastic tubing. The tubing is suspended from a stand so that the cassette angles downward at 45 degrees from vertical, approximately four feet above the floor. Cassettes are positioned in areas representative of the conditions being monitored, away from walls, furniture and obstructions. Prior to commencement of sampling, pumps are calibrated by rotameter to flow rates between four and nine liters per minute, depending upon conditions. Stationary box fans are set up to direct air toward the ceiling. One fan is used for each 10,000 cubic feet of work area volume. A one-horsepower leaf blower is used to sweep all floors, walls and ceilings in the space. The stationary fans are activated at low speed. Cassettes are opened and pumps are activated and allowed to run for sufficient time to sample a desired volume of air. For TEM clearance sampling, a minimum of five (5) samples of at least 1,200 liters each are collected inside the enclosure. Along with these samples, one field blank from inside the enclosure and one laboratory blank are forwarded to the laboratory. Field blanks are sample cassettes which are opened for 30 seconds in the area being monitored. Laboratory blanks are unopened cassettes from the same batch which can be used to establish a filter background level. Analysis TEM clearance samples are analyzed according to AHERA protocol as found in 40 CFR, Part 763, Appendix A to Subpart E. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

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69 Appendix C Insurance Certificate(s) -Related Work Project Permit O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

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79 Appendix D -In Sheet(s) -In Sheet(s) (if applicable) Worker Certificates/State Licenses/Medicals O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

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103 Appendix F On-Site Monitor Qualifications Air Monitoring Notification O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

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109 Appendix G Incident Reports O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

110 Incident Report IEA Project No.: 2001/01390 Date: June 18, 2007 Hazel Park Middle School Summer 2007 Asbestos Removal Phase 1 Rooms 209 & 211 Results for TEM clearance samples #11 through #15, collected on June 18, 2007, in Rooms 209 & 211 did not pass the required clearance standard of 70 structures per square millimeter(s/mm 2 ). The first sample analyzed had a result of 290 s/mm 2. Twell Environmental was informed of the results. The work area was re-cleaned utilizing HEPA-filtered vacuums and wet methods. TEM clearance samples #26 through #30, collected on June 19, 2007, were analyzed, and all were None Detected. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007

111 Incident Report IEA Project No.: 2001/01390 Date: June 21, 2007 Hazel Park Middle School Summer 2007 Asbestos Removal Phase 2 Room 213/215/217 Sample #41, collected adjacent to the decon near Room 217, was determined to be over the clearance level. IEA informed Twell Environmental. Twell isolated the work area with a poly barrier wall and appropriate asbestos signs. PCM samples were analyzed utilizing TEM. The samples were delivered to EMSL for analysis. The sample results determined that there was no asbestos present. Date: June 22, 2007 IEA informed Twell of the results and the barriers were removed. O:\Client Files\S\St. Paul Public Schools\EPDM\ Hazel Park\Final Report\#R hazel park final.doc IEA 2007