INDOOR AIR QUALITY SURVEY REPORT LITERATURE BUILDING UNIVERSITY OF CALIFORNIA, SAN DIEGO LA JOLLA, CALIFORNIA PREPARED FOR: University of California, San Diego 9500 Gilman Drive, CSC-Fm/c0958 La Jolla, California 92093 PREPARED BY: Ninyo & Moore Geotechnical and Environmental Sciences Consultants 5710 Ruffin Road San Diego, California 92123 November 6, 2009 (Revised December 11, 2009) Project No. 106702001 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 TABLE OF CONTENTS Page EXECUTIVE SUMMARY .............................................................................................................1 1. INTRODUCTION ....................................................................................................................4 2. INVOLVED PARTIES ............................................................................................................4 3. FIELD OBSERVATIONS........................................................................................................4 4. VENTILATION AND GENERAL INDOOR AIR QUALITY (IAQ) ....................................5 5. AIR SAMPLING ......................................................................................................................6 5.1. Evacuated Canister Samples.........................................................................................6 5.2. Sorbent Tube Samples ..................................................................................................6 6. GENERAL DISCUSSION AND INTERPRETATION OF RESULTS ..................................7 6.1. Temperature and Relative Humidity ............................................................................7 6.2. Carbon Monoxide .........................................................................................................7 6.3. Carbon Dioxide.............................................................................................................8 6.4. Ultra-Fine Particles.......................................................................................................8 6.5. Volatile Organic Analytes ............................................................................................9 6.6. Sorbent Tube Sampling for Aldehydes and PAHs .....................................................11 7. CONCLUSIONS AND RECOMMENDATIONS .................................................................11 8. LIMITATIONS.......................................................................................................................12 Tables Table 1 − Summary of Indoor Air Quality Measurements Table 2 – TO-15 Analysis Results Table 3 – Aldehyde Scan Analysis Results Table 4 – Polynuclear Aromatic Hydrocarbon Results Appendices Appendix A – Volatile Organics Laboratory Report and Chain-of-Custody Documentation Appendix B – Aldehyde Scan Laboratory Report and Chain-of-Custody Documentation Appendix C – Polynuclear Aromatic Hydrocarbon Laboratory Report and Chain-of-Custody Documentation 106702001 R Rev2.doc i Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 EXECUTIVE SUMMARY Ninyo & Moore was retained by the University of California, San Diego (UCSD) to perform indoor air quality studies of the Literature Building in response to indoor air quality concerns. The Literature Building is located in the Warren College section of the University of California, San Diego campus and the concern was that airborne contaminants may be present within the building envelope. Field activities were performed on October 8 and 9, 2009. Sampling of various air quality parameters included temperature, relative humidity, carbon monoxide (CO) levels, carbon dioxide (CO2) levels, ultra-fine particles, and a broad spectrum of volatile organic analytes. To summarize the findings of the assessment, the facility’s indoor air quality (IAQ) can be characterized by the following major points: • Temperature and relative humidity were assessed within the Literature Building to determine if these air quality parameters fall outside recommended ranges. Measurement of these parameters outside of recommended ranges can sometimes be indicative of problems with building design or maintenance. On October 8 and 9, 2009 the average temperature inside the building was in the low to mid-70’s and the indoor relative humidity ranged from the low to high 50’s. These conditions were found to be within the American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) Standard 55 comfort parameters of 68 to 74.5 degrees Fahrenheit (wintertime) and 30 percent to 65 percent relative humidity. • Direct-reading instruments showed CO levels in measured areas of the building to be 1 part per million (ppm) or less. The United Sates Environmental Protection Agency (USEPA) has set National Primary Ambient Air Quality Standards for Outdoor Air to be used in locating ventilation sources for buildings. Exposure limits for CO are a maximum of 35 ppm for one hour, not more than one time per year, or 9 ppm over any eight-hour period. The American Conference of Governmental Industrial Hygienists (ACGIH) and US Occupational Safety and Health Administration (OSHA) have also set similar maximum exposure limits in the Industrial Workplace Standard. There are no federal regulations governing CO exposure limits in non-industrial indoor environments. In any case, concentrations of CO, as measured in the Literature Building, are not considered significant. • CO2 is a good indicator of proper ventilation within a building environment and the ASHRAE’s Standard 62 recommends an indoor level not to exceed 650 ppm above outdoor ambient air. Direct-reading instruments employed during the study showed CO2 levels in measured areas of the Literature Building to be generally between 420 and 700 ppm, in comparison to the measured outdoor levels at approximately 390 to 400 ppm. This is considered within the recommended balance of outdoor to re-circulated indoor air. • A photo-ionization detector (PID), with a detection limit in the parts per billion (ppb) range, was utilized to detect any ambient volatile organic compounds within the Literature Building in real time. The intent was to use this qualitative instrument to locate areas of high organic vapor (or “hot-spots”) for further sampling. Indications of organic vapor were carefully docu- 106702001 R Rev2.doc 1 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 mented, however, volatile organic vapors in excess of 5 ppb were not noted during the assessment. • A condensation particle counter was used to assess any unusual condition associated with the presence of ultra-fine particles (UFPs) that were present, resulting from sources of combustion or chemical reaction, not previously detected. Respiration of UFPs challenges the body’s natural defense mechanisms and overexposure may strain these mechanisms, causing an adverse reaction. Measurements of UFPs within the Literature Building during this assessment were generally well within acceptable parameters for indoor air and the only unusual condition noted appears to be a transitory elevated reading within Room 441. No apparent source was readily identified for this elevated UFP reading. A representative of the UCSD Environment, Health and Safety office collected an additional set of UFP readings of Room 441 on December 1, 2009, and reported that the UFP readings were consistent with measurements collected from outdoors and the first floor of the Literature Building. • Evacuated canisters were utilized in a number of different areas within the Literature Building, with exact locations chosen by the Literature Building Committee. The canisters were submitted to a laboratory for subsequent analysis via Mass Spectroscopy. The analytical method (USEPA Method TO-15) included analysis of a broad spectrum of volatile organic vapor analytes. Some chemicals, most commonly associated with household cleaning products, were detected in the parts per billion range, including ethanol, acetone, and isopropyl alcohol. The levels of the detected compounds were present in concentrations that should not cause concern (i.e., compounds were present in the parts per billion range, not parts per million range). These compounds were also found in similar low concentrations in both of the control buildings and in the outdoor sample collected on the second day of sampling activities. Toxic compounds or compounds widely recognized as being carcinogenic were not identified in the laboratory analysis. • Sorbent tubes were used for sampling for polynuclear aromatic hydrocarbons (PAHs) for analysis by National Institute for Occupational Safety and Health (NIOSH) Method 5506. The analysis included anthracene, benzoapyrene, chrysene, phenanthrene and pyrene among other known carcinogenic compounds. Locations mirrored the canister sampling described above. These analytes were not detected above the method detection limit (generally in the parts per billion range) in any of the samples collected. • Sorbent tubes were used for sampling for aldehydes for analysis by NIOSH Method 2016. The analysis included acid aldehyde, acetone, acrolein, benzaldehydes, butyraldehydes, chrotonaldehydes, propionaldehyde and formaldehyde. Again, sampling locations mirrored the canister sampling, which were located according to Literature Building Committee instructions. In the samples collected, formaldehyde and acetaldehyde were detected in the majority of the samples, however, the concentrations of these compounds were in the partper-billion range. Similar low concentrations of formaldehyde and acetaldehyde were also found in the samples collected from within both of the control buildings. Concentrations of acetone was also detected in two samples and in one of the control building samples. Low 106702001 R Rev2.doc 2 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 concentrations of formaldehyde, acetaldehyde, and acetone, as found in this study, are often detectable in indoor environments and should not be considered abnormal or problematic at the detected low concentrations. • In addition to the findings above, a visual evaluation was performed of the main air handling unit on the roof of the building and several of the intermediary units located on the first floor. No evidence of biological growth or standing water was noted within the heating, ventilation, and air conditioning units evaluated, nor was any significant moisture condition or unusual finding noted in or around these units. In addition, no evidence of past moisturerelated issues that might cause an adverse condition were observed within the air handling units on the roof or first floor of the building, accessible plenum returns, or in filtration apparatus during this assessment. In summary, during on-site investigation, Ninyo & Moore could not find evidence to corroborate a health concern nor did our own sampling and subsequent analytical testing indicate an untoward condition. Based on all of the findings mentioned above, no further action is recommended concerning further specialized investigation of indoor air quality in the Literature Building at this time. 106702001 R Rev2.doc 3 Literature Building, UCSD La Jolla, California 1. Revised December 11, 2009 Project No. 106702001 INTRODUCTION Ninyo & Moore was retained by the University of California, San Diego, to perform indoor air quality studies in response to concerns regarding indoor air quality. The Literature Building is located in the Warren College section of the University of California, San Diego campus and the concern was that possible airborne contaminants may be present within the building envelope. Field activities were performed on October 8 and 9, 2009. 2. INVOLVED PARTIES Mr. Stephen Waide, a Ninyo & Moore Certified Industrial Hygienist (CIH 7005CP), Certified Indoor Environmental Consultant (CIEC 0611042) and Certified Microbial Consultant (CMC 0608087) designed the assessment, performed field observations and data analysis, and provided project oversight and quality review. Air sampling was performed by Mr. Waide, Mr. J. Brendan Phelan, and Mr. Nicolas Carpenter on October 8 and 9, 2009. Mr. Waide, Mr. Phelan, and Mr. Carpenter were accompanied by Professor Roddy Reid of the UCSD Literature Building Committee, Professor Dan Donahue, and Ms. Daphne Thaung (CIH) of the UCSD Environment, Health and Safety office during site reconnaissance and sampling activities. Building air handling units, located in a mechanical room on the fifth floor of the building and in interstitial ceiling plenums on the first floor of the building, were observed on the first day of sampling. 3. FIELD OBSERVATIONS During the field reconnaissance activities on October 8 and 9, 2009, operations within the Literature Building appeared to be representative of those of a typical weekday. Weather was clear and sunny with a temperature of approximately 70º Fahrenheit (F). The air handling unit (AHU), located in a mechanical room on the fifth floor of the building, was assessed. Only a portion of the Literature Building is supplied with air from a Temtrol™ air handler. Pleated filters were accessible (PerfectPleat™), and while slightly dirty, appeared to be fully functional. Secondary BohnTM AHUs were observed in the interstitial ceiling plenums on the first floor of the building. The drain pans of these units were made partly accessible for observa- 106702001 R Rev2.doc 4 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 tion. Visible interior areas of the units were observed to be dry and relatively clean. Neither debris, mold growth, nor standing water was observed in the drain pans underneath the secondary AHUs. 4. VENTILATION AND GENERAL INDOOR AIR QUALITY (IAQ) An assessment of major air handling systems was conducted using a calibrated Q-Track Plus, Model 8554 IAQ meter produced by TSI Instruments. Measurements of temperature (Temp), relative humidity (rH), carbon monoxide (CO), and carbon dioxide (CO2) were collected throughout the Literature Building. Assessments were conducted in the morning of October 8, 2009, and in the afternoon of October 9, 2009. Measurements of these parameters were also obtained from the outdoor environment for comparative analysis. Pressure differentials were assessed with ventilation smoke tubes for areas adjacent to the common areas (hallways). Visual observation of the generated smoke generally indicated an appropriate movement of air including negative pressure to the restrooms on each of the three floors of the building. The heating, ventilation, and air conditioning (HVAC) system appeared to be appropriate for the size of, and activities in, the Literature Building. Measurements of temperature, relative humidity, CO, and CO2 within the facility all fell within normal ranges and indicates the system is capable of delivering sufficient outdoor air. Measurements obtained of temperature, relative humidity, CO, and CO2 are presented in Table 1. The following is a summary of the readings obtained, with a further discussion of these reading provided in Section 6: • Temp – On October 8, 2009, the temperature within the Literature Building ranged from approximately 70 to 75º F while the outside temperature the building was approximately 70º F. On October 9, 2009, the temperature within the Literature Building ranged from approximately 73 to 75º F while the outside temperature was approximately 73º F. • rH – On October 8, 2009, the relative humidity was approximately 52 to 55 percent, while the outside relative humidity was 52 percent. On October 9, 2009, the relative humidity was approximately 52 to 60 percent, while the outside relative humidity was 53 percent. • CO – On October 8 and 9, 2009, the carbon monoxide readings within the Literature Building and outside the building were generally less than 1 part per million (ppm). 106702001 R Rev2.doc 5 Literature Building, UCSD La Jolla, California • 5. Revised December 11, 2009 Project No. 106702001 CO2 – On October 8, 2009, carbon dioxide readings ranged from 450 to 610 ppm inside the Literature Building, while carbon dioxide readings were 390 ppm. On October 9, 2009, carbon dioxide readings ranged from 420 to 700 ppm inside the Literature Building, while carbon dioxide readings were 400 ppm AIR SAMPLING Air samples were obtained from the Literature Building for the analysis of volatile organic vapors, polynuclear aromatic hydrocarbons, and aldehydes to aid in evaluation of the indoor air quality. Descriptions of both evacuated canisters and sorbent tube sampling methods follow: 5.1. Evacuated Canister Samples A total of 22 evacuated canisters were utilized during this assessment to capture a representative sample of indoor air for subsequent analysis via Mass Spectroscopy. The analytical method included analysis of a broad spectrum of volatile organic vapor analytes. The 6-liter evacuated canisters were supplied and pre-cleaned by LA Testing of Los Alamitos, California. The approximate four-hour samples were collected by opening the valve on each canister to collect a sample of the air within the specified room until the canister obtained nearly equalized pressure with ambient surroundings. Each evacuated canister was then labeled with an identification number, documented on a chain-of-custody form, and submitted to the laboratory for analysis by the United Sates Environmental Protection Agency (USEPA) Method TO-15. The samples were submitted to LA Testing, an AIHA Industrial Hygiene Accredited Laboratory. Laboratory reports and chain-of-custody documentation are presented in Appendix A. 5.2. Sorbent Tube Samples Air samples collected for the evaluation of PAHs and aldehydes were collected using glass sorbent tubes and personal sampling pumps. The sampling pumps were calibrated to 0.50 liters per minutes for the aldehyde samples and to 2.0 liters per minute for the PAH samples, in accordance with the appropriate National Institute for Occupational Safety and (NIOSH) Method. The sorbent tubes used for the aldehyde samples was filled with a silica gel treated 106702001 R Rev2.doc 6 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 with 2,4-dinitrophenylhydrazine, while the sorbent tubes used for the PAH samples was filled was XAD-2 resin. The sorbent tubes were provided to Ninyo & Moore by LA Testing. After sample collection, the ends of each sorbent tube were capped and each tube was placed in a labeled sample identification bag, which was kept in a chilled cooler. The samples were transferred to LA Testing for analysis. The aldehyde samples were analyzed using NIOSH Method 2016M, which utilizes High Performance Liquid Chromatography (HPLC) and Ultraviolet (UV) detection. The PAH samples were analyzed using NIOSH Method 5506M, which utilizes HPLC and Fluorescence/Ultraviolet detection. Laboratory analytical reports and chain-of-custody documentation are presented in Appendices B and C. 6. GENERAL DISCUSSION AND INTERPRETATION OF RESULTS The following sections present a discussion of the results for the general IAQ parameters obtained and the air samples collected for identification and analysis of volatile organic compounds. 6.1. Temperature and Relative Humidity On October 8 and 9, 2009, the average temperature inside the building was in the low to mid-70’s and the indoor relative humidity ranged from the low to high 50’s. These conditions were found to be within the American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) Standard 55 comfort parameters of 68 to 74.5 degrees Fahrenheit (wintertime) and 30 percent to 65 percent relative humidity. 6.2. Carbon Monoxide Direct instrument readings indicated that CO concentrations in the surveyed areas were less than 1 ppm. Although there are no federal regulations governing CO exposure limits in nonindustrial indoor environments, USEPA has set National Primary Ambient Air Quality Standards for Outdoor Air to be used in locating ventilation sources for buildings. Exposure 106702001 R Rev2.doc 7 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 limits for CO have been established at a maximum of 35 ppm for one hour, not more than one time per year, or 9 ppm over any eight-hour period. The American Conference of Governmental Industrial Hygienists (ACGIH) and the Occupational Safety and Health Administration (OSHA) have established similar maximum exposure limits in the Industrial Workplace Standard. In view of these guidelines, the CO concentrations measured in the surveyed areas are not considered significant. 6.3. Carbon Dioxide CO2 is a good indicator of proper ventilation within a building environment and the ASHRAE’s Standard 62 recommends an indoor level not to exceed 650 ppm above outdoor ambient air. Carbon dioxide concentrations above 1,000 ppm can cause occupants to feel sluggish and may be indicative of low ventilation rates. Direct-reading instruments employed during the study showed CO2 levels in measured areas of the facility to be generally between 420 and 700 ppm, in comparison to the measured outdoor levels at approximately 390 to 400 ppm. This is considered within the recommended balance of outdoor to re-circulated indoor air although background (outdoor) levels appeared slightly elevated during the day of the study. 6.4. Ultra-Fine Particles A condensation particle counter was used to assess any unusual condition associated with the presence of ultra-fine particles (UFPs) that were present, resulting from sources of combustion or chemical reaction, not previously detected. Respiration of UFPs challenges the body’s natural defense mechanisms and overexposure may strain these mechanisms, causing an adverse reaction. Measurements of UFPs within the Literature Building during this assessment were generally well within acceptable parameters for indoor air and the only unusual condition noted was an elevated measurement of UFPs within Room 441. No apparent source was readily identified for what appears to have been either a transitory elevated UFP reading or a transcribing error. A representative of the UCSD Environment, Health and Safety office collected an additional set of UFP readings of Room 441 on De- 106702001 R Rev2.doc 8 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 cember 1, 2009, and reported that these readings were consistent with measurements collected from outdoors and the first floor of the Literature Building. 6.5. Volatile Organic Analytes Evacuated canisters were utilized in numerous areas of the Literature Building to capture a representative sample of the indoor air for subsequent analysis via Mass Spectroscopy. The analytical method (USEPA Method TO-15) included analysis of a broad spectrum of volatile organic vapor analytes as shown in Appendix A. Exact sampling locations were chosen by the Literature Building Committee. At the direction of the Literature Building Committee, duplicate samples were collected in Rooms 113, 123, and 129. “Normal” conditions within the room were identified with an “-A” modifier following the room location or where simply stated as the room location. Duplicate samples were collected after the carpet in the rooms were pulled back to expose the bare concrete. Samples collected during this variation were identified with a “-B” modifier following the room location. In Rooms 113 and 139 only, further duplicate samples were collected after the drop-in, acoustic ceiling panels had been displaced to expose the metal ceiling deck above. Samples collected during this variation were identified with a “-C” modifier following the room location. The laboratory analytical report indicated that acetone, ethanol, isopropanol and acetonitrile were detected in nearly all of the evacuated canister samples, including both control buildings and one of the outdoor samples. Acetone, ethanol and isopropanol can almost always be found in indoor environments at low concentrations due to their presence in common household cleaning products. The low concentrations detected were indicative of levels normally seen in indoor air quality investigations. The levels of the detected compounds were present in concentrations that should not cause concern (i.e., compounds were present in the parts per billion range, not parts per million range). Acetonitrile is commonly used in organic synthesis, acrylic fibers, pharmaceuticals, perfumes, room fresheners, and in nitrile rubber. While the source is not immediately apparent, acetoni- 106702001 R Rev2.doc 9 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 trile in these low concentrations is not of particular concern, as the concentration would need to be over two orders of magnitude larger to approach any recognized exposure limit. The Elevator Equipment Room represented an outlier in the study as many trace organic compounds were present, however none are generally recognized as toxic and these organic compounds were present at concentrations measured in the parts per billion range. This room was not expected to represent a normal indoor air environment and the results are not unusual for an environment with working mechanical, electrical and hydraulic equipment. In addition, these organic compounds were not found in the analysis of the samples collected from the hallway outside the Elevator Equipment Room, in the adjacent Room 123, and in the Elevator Car. The other contaminants found in what were considered trace amounts in occupied areas included toluene, 1,1-difluoroethane, 2-methyl-3-pentanone (MIBK), tetrachloroethene and Freon 11. Toluene, detected in the samples collected in the Elevator Room, Room 454, and in one of the outdoor samples, could come from a product like WD-40 or petroleum products used outside. The 1,1-difluoroethane and Freon 11, found in Room 123-B, Room 232, and Room 139-B are both refrigerants, with the likely source being air conditioners or small, office-sized refrigerators. The MIBK at the measured concentration (Room 139-B) could have come from the use of an office supply product and the tetrachloroethene at the measured concentration (Room 139-B) is potentially a dry cleaning product brought in on clothing. Again, these compounds were found at concentrations in the parts per billion range; at such concentrations, the presence of these compounds do not represent a concern. In summary, while canister sampling detected a number of compounds in trace concentrations (i.e., parts per billion range) in the occupied spaces, none were present in concentration to be of concern (i.e. concentrations in the parts per million range). With the possible exception of acetonitrile (also detected in some outdoor and control building samples), none of the compounds detected are unusual to an indoor office environment. The types and concentrations of none of these compounds should cause particular concern as the concentrations of these compounds, at levels as low as our study indicates, should not lead to chronic illness 106702001 R Rev2.doc 10 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 nor would they normally cause any discomfort. Laboratory reports and chain-of-custody documentation are presented in Appendix A. 6.6. Sorbent Tube Sampling for Aldehydes and PAHs Sorbent tubes were used for sampling for polynuclear aromatic hydrocarbons (PAHs) for analysis by NIOSH Method 5506. The analysis included anthracene, benzoapyrene, chrysene, phenanthrene and pyrene among other known carcinogenic compounds. Sample locations and duplicate sampling mirrored the canister sampling described in the previous section. None of the analytes were detected at concentrations above the method detection limit (generally in the parts per billion range) in any of the samples collected. Sorbent tubes were used for sampling for aldehydes for analysis by NIOSH Method 2016. The analysis included acid aldehyde, acetone, acrolein, benzaldehydes, butyraldehydes, chrotonaldehydes, propionaldehyde and formaldehyde. Again, sampling locations mirrored the canister sampling that were located according to Literature Building Committee instructions. In the samples collected, formaldehyde and acetaldehyde were detected in the majority of the samples, however, the concentrations of these compounds were in the part-per-billion range. Similar low concentrations of formaldehyde and acetaldehyde were also found in the samples collected from within both of the control buildings. Concentrations of acetone was also detected in two samples and in one of the control building samples. Low concentrations of formaldehyde, acetaldehyde, and acetone, as found in this study, are often detectable in indoor environments and should not consider abnormal or problematic at these low concentrations. 7. CONCLUSIONS AND RECOMMENDATIONS Indoor air quality parameters investigated during this assessment included temperature, humidity, CO levels, CO2 levels, pressure differentials, ultra-fine particles, and a broad spectrum of volatile organic analytes that might be associated with indoor air quality problems. Air quality measurements were performed throughout the interior of the building and air samples were collected in the specific rooms, at the direction of the Literature Building Committee, at outdoor locations, and 106702001 R Rev2.doc 11 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 within two control buildings. One control building (the Warren Building) is located adjacent to the Literature Building. The second control building (the Social Science Building) is of a similar design and age to the Literature Building. In each case, direct measurements and results of collected samples indicated conditions consistent with a building that has an efficient and balanced HVAC system that is properly removing indoor air and properly mixing fresh, outdoor air. In addition, there were no conditions noted that would indicate a chemical exposure nor any evidence of past moisture-related issues that might cause an adverse condition in the observed air handling units on the roof and first floor of the building, accessible plenum returns, or in filtration apparatus. Due to the lack of evidence of potential contaminants capable of causing chronic health problems, sensitization or discomfort within samples collected and analyzed, no further action is recommended concerning pursuing future investigations to the indoor air quality of the Literature Building. 8. LIMITATIONS Air sampling results are limited in that they represent airborne concentrations at the time of sample collection only. Changes in weather, operating procedures, ventilation, temperature, humidity, tenant practices and other conditions, including the inappropriate introduction of moisture, may cause variations in anticipated airborne chemical concentrations. While this assessment was relatively comprehensive, airborne contaminants may still be present that facilitate a faint, unpleasant odor in some individuals. There is no universal reaction to a measured amount of a particular material. People simply have different tolerance levels. Because of this, it is difficult to assign standards or even guidelines to set acceptable versus unacceptable levels of literally thousands of airborne pollutants present in indoor environments. Undetected contaminants could be present in differing amounts that hyper-sensitive individuals will find irritating or otherwise unpleasant. Ninyo & Moore has performed the tasks set forth above in a thorough and professional manner consistent with industry guidelines and under supervision of a certified professional. Ninyo & Moore cannot guarantee and does not warrant that this limited assessment has revealed all ad- 106702001 R Rev2.doc 12 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 verse environmental conditions affecting the site. Nor can Ninyo & Moore warrant that the assessment requested would satisfy the dictates of, or provide a legal defense in connection with, environmental laws or regulations. The results reported and any opinions reached by Ninyo & Moore are for the benefit of the client. Our conclusions, recommendations, and opinions are based on an analysis of the observed site conditions. It should be understood that changes to the applicable laws, regulations, codes, and standards of practice may occur due to government action or the broadening of knowledge. The services provided do not constitute a complete and comprehensive assessment of indoor air quality, and the information obtained is relevant for the time and date the services were performed. The findings and conclusions as presented in this letter are based on the services provided. No warranty, express or implied, is intended regarding the results of this report and any subsequent reports, correspondence, or consultation. The services summarized herein were performed in accordance with the local standard of care in the geographic region at the time the services were rendered. 106702001 R Rev2.doc 13 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 Table 1 - Summary of Indoor Air Quality Measurements Location Floor Room CO2 (ppm) Temperature (º F) Relative Humidity (%) CO (ppm) UFP (p/cc) VOCs (ppb) Comments 51.6 52.8 55.0 52.9 53.6 53.6 54.4 53.8 54.6 55.0 54.4 1 1 1 1 1 1 1 1 1 1 1 4,700 4,600 4,800 3,200 4,100 3,080 2,050 3,600 3,300 3,500 5,200 --0 0 -0 0 0 0 0 0 ------------ 52.2 1 4,500 0 -- 52.1 1 5,200 0 -- 53.1 1 4,100 0 -- 52.7 52.9 53.9 53.9 54.2 54.3 55.9 55.2 1 1 1 1 1 1 1 1 3,700 5,100 3,000 2,600 3,500 4,400 6,200 4,400 0 0 0 0 0 0 0 0 --------- 53.7 57.3 55.4 54.7 0 0 0 1 4,500 2,200 1,550 1,680 0 1 1 0 ----- Measurements collected October 8, 2009 from 11:00 AM to 12:00 PM 1st Floor 1st Floor 1st Floor 1st Floor 1st Floor 1st Floor 1st Floor 1st Floor 1st Floor 1st Floor 2nd Floor Outside 390 70.5 East Hall 460 72.4 Room 133 523 73.2 Room 134 490 73.5 Main Hall 492 73.1 Room 139 512 73.1 Room 140 548 73.6 Room 110 480 72.2 Room 113 550 71.8 Room 116 504 72.1 Room 232 590 74.7 Hallway outside 500 75.0 2nd Floor Room 232 Stair #1 610 73.5 3rd Floor Hallway outside 437 73.5 4th Floor Room 454 Room 454 454 73.0 4th Floor th Elevator Lobby 432 72.4 4 Floor Room 406 510 72.2 4th Floor Room 407 552 72.2 4th Floor th Room 410 487 71.9 4 Floor rd Elevator Lobby 412 71.4 3 Floor nd Elevator Lobby 570 72.0 2 Floor st Elevator Lobby 450 71.6 1 Floor Measurements collected October 9, 2009 from 3:45 PM to 5:20 PM 1st Floor 1st Floor 1st Floor 1st Floor Outside Room 123 Elevator Room Room 133 106702001 T revised.xls 400 695 585 650 72.9 74.7 74.9 74.6 1 of 3 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 Table 1 - Summary of Indoor Air Quality Measurements Location Floor Room 1st Floor Hallway outside Room 131 Room 125 Stair #2 Men's Restroom Room 139 Room 149 Stair #3 Hallway outside Room 150 Room 116 Room 113 Elevator Lobby Stair #1 Elevator Lobby Room 210 Room 254 Hallway outside Room 249 Room 232 Room 226 Hallway outside Room 229 Hallway outside Room 331 Room 326 Room 329 1st Floor 1st Floor 1st Floor 1st Floor 1st Floor 1st Floor 1st Floor 1st Floor 1st Floor 1st Floor 2nd Floor 2nd Floor 2nd Floor 2nd Floor 2nd Floor 2nd Floor 2nd Floor 2nd Floor 3rd Floor 3rd Floor 3rd Floor 3rd Floor 3rd Floor 3rd Floor Elevator Lobby Room 352 Hallway outside Room 343 106702001 T revised.xls CO2 (ppm) Temperature (º F) Relative Humidity (%) CO (ppm) UFP (p/cc) VOCs (ppb) 660 74.9 56.8 0 2,580 0 465 530 560 495 435 650 74.8 74.2 74.2 74.0 73.9 73.9 56.3 56.1 57.3 56.6 53.0 57.1 0 1 1 1 1 0 2,250 3,780 3,780 2,070 1,380 3,050 0 0 0 0 0 0 670 74.2 59.0 1 1,950 5 450 502 490 618 630 540 510 73.6 73.8 73.4 72.7 73.2 73.6 73.6 58.2 59.1 58.6 58.5 59.1 60.4 60.4 1 1 1 1 1 1 1 1,510 1,410 1,570 4,040 2,650 1,790 1,970 0 0 0 2 0 0 0 536 73.9 59.5 1 2,280 0 580 540 74.9 76.2 60.8 58.5 1 1 2,380 1,760 0 0 920 76.0 58.8 1 2,570 3 750 74.7 59.8 1 1,420 0 670 530 74.7 74.3 57.2 57.0 1 1 1,660 1,520 0 0 415 590 73.4 74.4 57.2 58.8 1 1 1,850 2520 0 0 420 74.7 58.1 0 1,840 0 2 of 3 Comments Measurements collected by HVAC supply vent ------Measurements collected by HVAC supply vent -------Measurements collected by HVAC supply vent --Measurements collected by HVAC supply vent Measurements collected by HVAC supply vent Windows open in room Windows open in room --Measurements collected by HVAC supply vent Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 Table 1 - Summary of Indoor Air Quality Measurements Location Floor Room CO2 (ppm) 3rd Floor Room 344 470 75.0 58.8 1 2,360 0 3rd Floor Elevator Car 510 73.9 58.6 0 1,700 0 4th Floor 4th Floor 4th Floor 4th Floor 4th Floor 4th Floor 4th Floor Room 410 Room 406 Room 407 Elevator Lobby Men's Restroom Women's Restroom Room 454 Hallway outside Room 439 Room 441 Room 423 Room 431 Stair #1 Stair #2 Stair #3 585 480 485 445 460 500 475 75.0 75.6 75.8 75.2 75.4 75.0 74.0 59.6 59.0 59.0 57.8 58.0 52.4 57.9 1 1 1 1 1 1 1 1,410 1,160 1,290 1,740 1,580 1,180 1,230 1 0 0 0 0 0 0 530 74.2 59.2 1 2,100 3 500 470 570 560 700 540 74.5 75.0 74.8 73.6 74.6 75.0 59.6 58.2 57.8 58.1 58.6 58.4 1 1 1 1 1 1 10800 (1) 1,980 1,890 2,130 2,260 3,880 0 2 0 2 0 0 4th Floor 4th Floor 4th Floor 4th Floor 4th Floor 4th Floor 4th Floor Temperature (º F) Relative Humidity (%) CO (ppm) UFP (p/cc) VOCs (ppb) Comments Windows open in room Measurements collected in transit from 3rd to 4th Floors -------Measurements collected by HVAC supply vent ------- Notes: CO2 = Carbon Dioxide CO = Carbon Monoxide UFP = Ultra-Fine Particulates VOCs = Volatile Organic Compounds ppm = parts per million ppb = parts per billion p/cc = particles per cubic centimeter (1) = Reading appears to be a transitory elevated reading. A representative of the UCSD Environment, Health and Safety office collected an additional set of UFP readings of Room 441 on December 1, 2009, and reported that the UFP readings were consistent with measurements collected from outdoors and the first floor of the Literature Building 106702001 T revised.xls 3 of 3 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 106702001 T revised.xls 1 of 2 Hall to Elevator Elevator Cab Hallway (Warren Bulding) Room 205 (Social Sciences Building) Outdoor-1 (October 18, 2009) Outdoor-2 (October 19, 2009) Standard TO-15 Analytes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 12 110 10 ND ND ND 11 9.6 3.3 ND ND ND 3.8 5.8 4.9 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 1.1 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 0.6 ND ND ND Elevator Equipment ND ND ND ND ND ND ND ND 13 ND 12 ND 4.2 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Room 454 Room 133 ND ND ND ND ND ND ND ND 12 ND 87 ND 5.3 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Room 406 Room 123-B ND ND ND ND ND ND ND ND 9.4 ND 32 ND 5.2 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Room 232 Room123-A ND ND ND ND ND ND ND ND 28 ND 6.2 ND 6.0 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Room 140 Room 116 ND ND ND ND ND ND ND ND 12 ND 4.8 ND 4.3 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Room 139-C Room113-C ND ND ND ND ND ND ND ND 110 ND 2.9 ND 3.0 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Room 139-B Room 113-B ND ND ND ND ND ND ND ND 15 ND 3.2 ND 5.1 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Room 139-A Room 113-A Propylene Freon 12(Dichlorodifluoromethane) Freon 114(1,2-Dichlorotetrafluoroethane) Chloromethane Vinyl chloride 1,3-Butadiene Bromomethane Chloroethane Ethanol Freon 11(Trichlorofluoromethane) Isopropyl alcohol(2-Propanol) Freon 113(1,1,2-Trichlorotrifluoroethane) Acetone 1,1-Dichloroethene Carbon disulfide Methylene chloride Methyl-tert-butyl ether(MTBE) trans-1,2-Dichloroethene n-Hexane 1,1-Dichloroethane Vinyl acetate 2-Butanone(MEK) cis-1,2-Dichloroethene Ethyl acetate Chloroform Tetrahydrofuran 1,1,1-Trichloroethane Cyclohexane Carbon tetrachloride n-Heptane 1,2-Dichloroethane Benzene Trichloroethene 1,2-Dichloropropane Bromodichloromethane 1,4-Dioxane 4-Methyl-2-pentanone(MIBK) cis-1,3-Dichloropropene Toluene trans-1,3-Dichloropropene 1,1,2-Trichloroethane 2-Hexanone(MBK) Tetrachloroethene Dibromochloromethane Room 134 Sample Location Table 2 - TO-15 Analysis Results ND ND ND ND ND ND ND ND 14 ND 9.7 ND 4.9 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 29 ND 7.7 ND 3.3 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 2.5 ND 8.1 ND 4.7 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 24 ND ND ND 4.3 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 3.6 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 0.7 ND ND ND ND ND ND ND ND ND ND ND ND ND 7.1 ND 3.4 ND 5.4 ND ND ND ND ND ND ND ND ND ND ND ND ND ND 0.9 ND 1.2 ND ND ND ND ND ND ND ND 0.5 ND ND ND ND ND ND ND ND ND ND ND ND ND 8.5 ND 4.3 ND 4.5 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 6.5 ND ND ND 5.7 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 4.6 2.9 ND ND 5.6 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 4.7 ND 31 ND 6.2 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 3.0 ND 1.7 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 1.8 ND ND ND ND ND Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 15 4.8 ------- 3.5 -------- Notes: -A = Sample was collected under normal conditions in the room. -B = Sample was collected with a portion of the carpet pulled back. -C = Sample was collected with a portion of the drop-in, acoustic ceiling panel system displaced. ND = Not detected -- = Analyte was not detected in the TO-15 Library search. Samples analyzed by EPA Method TO-15 Sample results reported in parts per billion (ppb) Laboratory analytical data report and Chain-of-Custody documentation are presented in Appendix B 106702001 T revised.xls 2 of 2 Outdoor-2 (October 19, 2009) 36 -------- Outdoor-1 (October 18, 2009) 97 -------- Room 205 (Social Sciences Building) 18 -------- Hallway (Warren Bulding) --------- Elevator Cab 3.3 -------- Hall to Elevator Acetonitrile 1,1-difluoroethane 2-Propenoic acid Octane Nonane Decane Dodecane 2-methyl butane ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Other Detected Analytes 4.9 7.9 8.8 --6.8 ------------------- Elevator Equipment ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Room 454 Room 133 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Room 406 Room 123-B ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Room 232 Room123-A ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Room 140 Room 116 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Room 139-C Room113-C ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Room 139-B Room 113-B ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Room 139-A Room 113-A 1,2-Dibromoethane Chlorobenzene Ethylbenzene Xylene (para & meta) Xylene (Ortho) Styrene Bromoform 1,1,2,2-Tetrachloroethane 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene Benzyl chloride 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachloro-1,3-butadiene Room 134 Sample Location Table 2 - TO-15 Analysis Results ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 1.5 6.2 1.8 ND ND ND 2.0 ND 1.6 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 4.2 -------- 5.4 -------- 28 16 ------- --------- --------- 140 -7.6 2.3 2.0 11 3.4 -- 5.4 -------- 41 -------- --------- 92 -------- --------- 2.5 ------1.6 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 Acrolein Benzaldehyde Butraldehyde Formaldehyde Propionaldeyde Crotonaldehyde Room 113-A Room 113-B Room 113-C Room 116 Room 123-A Room 123-B Room 133 Room 134 Room 139-A Room 139-B Room 139-C Room 140 Room 232 Room 406 Room 454 Elevator Equipment Hall to Elevator Elevator Car Hallway (Warren Building) Room 205 (Social Sciences Building) Outdoor-1 (October 18, 2009) Outdoor-2 (October 19, 2009) Acetone Sample Location Acetaldehyde Table 3 - Aldehyde Scan Analysis Results 0.0067 0.032 <0.0035 0.0052 <0.0044 0.0060 0.0020 0.0021 0.0056 0.020 <0.0036 0.0062 0.0032 0.013 0.0051 0.021 <0.0060 0.0077 <0.0030 <0.011 <0.0040 <0.0027 <0.0050 <0.0039 <0.0017 <0.0018 0.0045 <0.011 <0.0041 <0.0048 0.0015 <0.0059 <0.0057 <0.0074 <0.0068 <0.0060 <0.0042 <0.015 <0.0055 <0.0038 <0.0068 <0.0055 <0.0024 <0.0024 <0.0044 <0.015 <0.0057 <0.0067 <0.0028 <0.0081 <0.0079 <0.010 <0.0094 <0.0083 <0.0022 <0.0080 <0.0029 <0.0020 <0.0036 <0.0029 <0.0013 <0.0013 <0.0023 <0.0077 <0.0030 <0.0035 <0.0015 <0.0043 <0.0042 <0.0054 <0.0049 <0.0044 <0.0024 <0.0088 <0.0032 <0.0022 <0.0040 <0.0032 <0.0014 <0.0014 <0.0026 <0.0085 <0.0033 <0.0039 <0.0016 <0.0047 <0.0046 <0.0060 <0.0055 <0.0048 0.015 0.0096 0.0077 0.0070 0.0035 0.0070 0.0047 0.0059 0.0093 0.0069 0.0080 0.014 0.0092 0.020 0.0080 0.025 0.014 0.022 <0.0024 <0.0088 <0.0032 <0.0022 <0.0040 <0.0032 <0.0014 <0.0014 <0.0025 <0.0084 <0.0033 <0.0039 <0.0016 <0.0047 <0.0046 <0.0059 <0.0055 <0.0048 <0.0050 <0.018 <0.0080 <0.0054 <0.0099 <0.0069 <0.0028 <0.0035 <0.0052 <0.021 <0.0059 <0.0096 <0.0040 <0.0097 <0.012 <0.015 <.011 <0.012 0.0079 <0.0052 <0.0071 <0.0038 <0.0042 0.0093 <0.0041 <0.010 0.018 0.014 <0.012 <0.0061 <0.0068 0.0074 <0.0067 <0.017 <0.0062 <0.0070 <0.0097 <0.0051 <0.0057 <0.0045 <0.0056 <0.012 0.018 <0.0087 <0.012 <0.0064 <0.0070 <0.0056 <0.0070 <0.014 Notes: -A = Sample was collected under normal conditions in the room. -B = Sample was collected with a portion of the carpet pulled back. -C = Sample was collected with a portion of the drop-in, acoustic ceiling panel system displaced. Samples analyzed by NIOSH Method 2016 Sample results reported in parts per million (ppm) Laboratory analytical data report and Chain-of-Custody documentation are presented in Appendix B 106702001 T revised.xls 1 of 1 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 Acenapthene Flourene Phenanthrene Anthracene Flouranthene Pyrene Benzo (a) anthracene Chrysene Benzo (e) pyrene Benzo (b) flouranthene Benzo (k) fluoranthene Benzo (a) pyrene Dibenz (a,h) anthracene Benzo (g,h,i) perylene Indeno (1,2,3,-cd) pyrene Room 113-A Room 113-B Room 113-C Room 116 Room 123-A Room 123-B Room 133 Room 134 Room 139-A Room 139-B Room 139-C Room 140 Room 232 Room 406 Room 454 Elevator Equipment Hall to Elevator Elevator Car Hallway (Warren Building) Room 205 (Social Sciences Building) Outdoor-1 (October 18, 2009) Outdoor-2 (October 19, 2009) Acenapthylene Sample Location Napthalene Table 4 - Polynuclear Aromatic Hydrocarbon Results <0.00087 <0.00039 <0.00034 <0.00088 <0.00095 <0.00043 <0.00092 <0.00093 <0.00093 <0.00037 <0.00049 <0.00095 <0.00095 <0.00045 <0.00053 <0.00035 <0.00035 <0.00037 <0.0015 <0.00066 <0.00057 <0.0015 <0.0016 <0.00072 <0.0015 <0.0016 <0.0016 <0.00063 <0.00083 <0.0016 <0.0016 <0.00076 <0.00089 <0.00060 <0.00059 <0.00063 <0.0014 <0.00065 <0.00057 <0.0015 <0.0016 <0.00071 <0.0015 <0.0015 <0.0015 <0.000062 <0.00082 <0.0016 <0.0016 <0.00075 <0.00088 <0.00059 <0.00059 <0.00062 <0.00013 <0.000060 <0.000052 <0.00014 <0.00015 <0.000066 <0.00014 <0.00014 <0.00014 <0.000057 <0.000076 <0.00015 <0.00015 <0.000070 <0.000082 <0.000055 <0.000054 <0.000057 <0.00013 <0.000056 <0.000049 <0.00013 <0.00014 <0.000061 <0.00013 <0.00013 <0.00013 <0.000054 <0.000071 <0.00014 <0.00014 <0.000065 <0.000076 <0.000051 <0.000051 <0.000053 <0.00013 <0.000056 <0.000049 <0.00013 <0.00014 <0.000061 <0.00013 <0.00013 <0.00013 <0.000054 <0.000071 <0.00014 <0.00014 <0.000065 <0.000076 <0.000051 <0.000051 <0.000053 <0.00011 <0.000049 <0.000043 <0.00011 <0.00012 <0.000054 <0.00012 <0.00012 <0.00012 <0.000047 <0.000063 <0.00012 <0.00012 <0.000057 <0.000067 <0.000045 <0.000045 <0.000047 <0.00011 <0.000049 <0.000043 <0.00011 <0.00012 <0.000054 <0.00012 <0.00012 <0.00012 <0.000047 <0.000063 <0.00012 <0.00012 <0.000057 <0.000067 <0.000045 <0.000045 <0.000047 <0.000097 <0.00044 <0.000038 <0.00010 <0.00011 <0.000048 <0.00010 <0.00010 <0.00010 <0.000042 <0.000056 <0.00011 <0.00011 <0.000051 <0.000060 <0.000040 <0.000040 <0.000042 <0.00049 <0.00022 <0.00019 <0.00050 <0.00054 <0.00024 <0.00052 <0.00052 <0.00052 <0.00021 <0.00028 <0.00053 <0.00054 <0.00025 <0.00030 <0.00020 <0.00020 <0.00021 <0.00044 <0.00020 <0.00017 <0.00045 <0.00049 <0.00022 <0.00047 <0.00047 <0.00047 <0.00019 <0.00025 <0.00048 <0.00049 <0.00023 <0.00027 <0.00018 <0.00018 <0.00019 <0.000088 <0.000039 <0.000035 <0.000090 <0.000097 <0.00043 <0.000093 <0.000095 <0.000094 <0.000038 <0.000050 <0.000096 <0.000097 <0.000046 <0.000054 <0.000036 <0.000036 <0.000038 <0.000044 <0.000020 <0.000017 <0.000045 <0.000048 <0.000022 <0.000047 <0.000047 <0.000047 <0.000019 <0.000025 <0.000048 <0.000048 <0.000023 <0.000027 <0.000018 <0.000018 <0.000019 <0.000044 <0.000020 <0.000017 <0.000045 <0.000048 <0.000022 <0.000047 <0.000047 <0.000047 <0.000019 <0.000025 <0.000048 <0.000048 <0.000023 <0.000027 <0.000018 <0.000018 <0.000019 <0.00040 <0.00018 <0.00016 <0.00041 <0.00044 <0.00020 <0.00042 <0.00043 <0.00043 <0.00017 <0.00023 <0.00044 <0.00044 <0.00021 <0.00024 <0.00016 <0.00016 <0.00017 <0.000080 <0.000036 <0.000032 <0.000082 <0.000088 <0.000040 <0.000085 <0.000086 <0.000086 <0.000035 <0.000046 <0.000088 <0.000088 <0.000042 <0.000049 <0.000033 <0.000033 <0.000034 <0.000080 <0.000036 <0.000032 <0.000082 <0.000088 <0.000040 <0.000085 <0.000086 <0.000086 <0.000035 <0.000046 <0.000088 <0.000088 <0.000042 <0.000049 <0.000033 <0.000033 <0.000034 <0.00054 <0.00091 <0.0010 <0.000084 <0.000078 <0.000078 <0.000069 <0.000069 <0.000061 <0.00030 <0.00028 <0.000055 <0.000028 <0.000028 <0.00025 <0.000050 <0.000050 <0.00037 <0.00063 <0.00062 <0.000057 <0.000054 <0.000054 <0.000047 <0.000047 <0.000042 <0.00021 <0.00019 <0.000038 <0.000019 <0.000019 <0.00017 <0.000035 <0.000035 <0.00065 <0.0011 <0.0011 <0.00010 <0.000094 <0.000094 <0.000083 <0.000083 <0.000073 <0.00037 <0.00033 <0.000066 <0.000033 <0.000033 <0.00030 <0.000061 <0.000061 <0.00036 <0.00060 <0.00059 <0.000055 <0.000051 <0.000051 <0.000045 <0.000045 <0.000040 <0.00020 <0.00018 <0.000036 <0.000018 <0.000018 <0.00016 <0.000033 <0.000033 Notes: -A = Sample was collected under normal conditions in the room. -B = Sample was collected with a portion of the carpet pulled back. -C = Sample was collected with a portion of the drop-in, acoustic ceiling panel system displaced. Samples analyzed by NIOSH Method 5506 Sample results reported in parts per million (ppm) Laboratory analytical data report and Chain-of-Custody documentation are presented in Appendix C 106702001 T revised.xls 1 of 1 Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 APPENDIX A VOLATILE ORGANICS LABORATORY REPORT AND CHAIN-OF-CUSTODY DOCUMENTATION 106702001 R Rev2.doc Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 APPENDIX B ALDEHYDE SCAN LABORATORY REPORT AND CHAIN-OF-CUSTODY DOCUMENTATION 106702001 R Rev2.doc Literature Building, UCSD La Jolla, California Revised December 11, 2009 Project No. 106702001 APPENDIX C POLYNUCLEAR AROMATIC HYDROCARBON LABORATORY REPORT AND CHAIN-OF-CUSTODY DOCUMENTATION 106702001 R Rev2.doc