Report on Testing and Analysis of the Concentration …Report on _____ Testing and Analysis = 111 of...

Report on _____

Testing and Analysis = 111

of the Concentration = - - - of HCFC-I23 ZEEEE

in Field Installations

Rooms Containing Hermetic Centrifugal Chillers

with General Machinery --

Prepared by The Trane Company

October, I991

TABLE OF CONTENTS wle

1 . Executive Summary .............................................. 1 a . Summary of Test Results ...................................... 1 b.TestData ................................................... 1

II . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

111 . Test Site Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

IV . Testing Methodology ............................................. 3 a . Activated Charcoal Tubes Air Samples.

Laboratory Gas Chromatograph Analysis ......................... 3 b . Portable Gas Chromatograph Analysis ........................... 4

V . Summary of Test Results .......................................... 4

VI . Conclusions and Recommendations ................................. 5

VI1 . Test Reports a.Abilene,Texas ................................................ 6 b . Austin, Texas ................................................ 8 c . Blacksburg, South Carolina .................................... 10 d . Carson, California ........................................... 12 e . Chatieston, South Carolina ..................................... 14 f.Indianapolis,lndiana .......................................... 16 g . Los Angeles, California ........................................ 18 h . Omaha, Nebraska ........................................... 20 i.Otiando,Florida ............................................. 22 j . Rootstown. Ohio ............................................ 24 k . St Peters. Missouri .......................................... 26 1 . Melbourne, Florida ........................................... 28

0- standard Inc . 1991

Executive Summary Without question, we are facing some of the most important environmental issues our industry has ever faced. Issues like ozone depletion, global warming and energy efficiency. The alternative refrigerant HCFC-123 offers the most balanced solution to these complex environmental challenges. Recent results from the two year inhalation toxicity tests on HCFC- 123, however, revealed the presence of benign tumors in some of the test animals. Because of these findings, Du Pont, the industry‘s prime supplier of HCFC-123, reduced their Allowable Exposure Limit (AEL)’ for HCFC-123 from 100 ppm to 10 ppm as a precautionary measure. This action raises the question, “Can centrifugal chillers be safely operated with a refrigerant with an AEL of 10 ppm?” Prior surveys indicated that the answer was yes. Conducted by Du Pont, these surveys indicated that during normal operation of hermetic chillers, the concentration of refrigerant in the equipment room was well below 10 PP” With the lowering of the AEL to 10 ppm, both Trane and Du Pont felt additional, more structured monitoring should be done to confirm earlier findings. Prior surveys indicated that as long as the installation guidelines in ASHRAE Standard 15R and the proper refrigerant handling procedures were followed, that the refrigerant concentration in the typical equipment room should be below one ppm. This level results in a safety margin of an order of magnitude below the new AEL. A study to measure the actual concentration of HCFC-123 in equipment rooms was commissioned by Trane with assistance from Du Pont. The methodology used is accepted by the National Institute for Occupational Safety and Health (NIOSH), the Occupational Safety and Health Administration (OSHA) and the American Conference of Governmental Industrial Hygienists (ACGIH). The test results in this report are documented by a Certificate of Analysis from an outside engineering laboratory. As such, the conclusions drawn in this report are based firmly in fact. We

welcome any and all questions regarding the data and the interpretation of the data. Summary of Test Results This study confirms our earlier confidence that properly installed and maintained Centrifugal chillers can be operated with HCFC-123 well within the new, lower AEL of 10 ppm. Twelve equipment rooms containing Trane hermetic centrifugal chillers operating with HCFC-123 have been tested as of this writing. All of these sites except one were determined to have concentrations of HCFCI 23 substantially less than 1 ppm, if any. Even with the reduction in the AEL from 100 to 10 ppm, at eleven installations the margin of safety was an order of magnitude lower than the AEL of 10 ppm. The hermetic integrity of the chiller was confirmed in all cases. In no case was the chiller itsetf the contributing factor to measurable levels of HCFG 123 in the equipment room. The presence of HCFC-123 at the one site where it was measured above one ppm was due to leaks from improperly stored refrigerant drums and a low level leak at the purge vent line. The leak at the purge vent line resulted from improper field installation and use of incompatible piping materials. This site in particular emphasizes the importance of Trane and Du Pont‘s standing recommendations to follow proper refrigerant handling and storage procedures and the installation recommendations of ASHRAE Standard 15R. It is important for the reader to understand the definition of AEL. The AEL is that concentration which a typical operator can be exposed to eight hours a day, 40 hours a week, for 50 years without experiencing any harmful effects. Because most operators do not spend a full 40 hours a week in the equipment room, the margins of safety reported in this document are further enhanced. It is also impers:i.;e to iinderstaiid that in HVAC applications, the greatest danger of all refrigerants is not their chronic toxicological effects, but rather their acute exposures. All halogen refrigerants pose the danger of asphyxiation. Because these refrigerants are heavier than air, they all displace oxygen, and in an enclosed space, one can suffocate in refrigerant just as one can drown in water.

Clearly, the lesson of the recent years is that our industry must treat all refrigerants with more respect. To this end, both Trane and Du Pont gratefully acknowledge the leadership being provided by the ASHRAE 34R and 15R Standards Committees.

7;est Data Site Location Measured PPM (TWA)‘ Abilene, Texas < 0.38 (LOO) Austin, Texas < 0.38 (Loa) Blacksburg, Swth Carolina < 0.35 (Loa) Carson, California3

Charleston, South Carolina < 0.33 (Loo) Indianapolis, Indiana < 0.40 (Loa) Los Angeles, California < 0.39 (Loo) Omaha, Nebraska < 0.40 (Loo) Orlando, Florida < 0.50 (Loa) Rootstown, Ohio < 0.39 (Loo) St. Peters, Missouri < 0.39 (Loo) Melbourne, Florida4 Initial Site Visit

Second Site Visit

0.64 @ 18 inches 0.49 @ 5feet

5.92 @ 18 inches 13.6 @ 5 feet

@ 18 inches < 0.56 (Loa)

< 0.33 (Loo) @ 5 feet

’An Allowable Exposure Limit (AEL) is an occupational inhalation exposure limit for chemicals set by the chemical manufacturer, in this case Du Pont, for substances that do not yet have a Threshold Limit Value (TLV) assigned by the American Conference of Governmental Industrial Hygienists. The AEL of 10 ppm for HCFG123 was set by the Du Pont AEL committee. An AEL is a time weighted average of the concentration that a typical operator or service technician could be exposed to eight hours per day, 40 hours per week, for an entire nperzting cereer withnut experiencing any harmful effects.

’The measurements reported as ”<” (Cess Than) a given value are based on the Limit of Quantitation (LOQ) of the measurement methodology. HCFC- 123 may or may not be present in concentrations less than these values, but it is certain that it is not present in concentrations above the listed value.

3At the Carson, California site, a detected source of the low level of HCFC-123 in the equipment room was empty HCFC-123 drums that were improperly sealed. This site had no mechanical ventilation. See the report for further information.

4At the initial visit to the Melbourne, Florida site, two leak sources were detected, one from the purge vent line, and another from a leaking half- empty drum of refrigerant. These conditions were corrected and the site was measured on a second visit. See the report for further information.

1

Introduction This report documents the test results from an ongoing study of installations of Pane hermetic centrifugal chillers using HCFGI 23. The purpose of the study is to gain a better understanding of the concentration of HCFGI 23 during normal operation in actual equipment moms in the field. The testing of these equipment moms was conducted by Trane with assistance from Du Pont. This document provides a comprehensive discussion of the equipment room testing and the results from twelve sites that have been tested. All information from all sites tested at the time of this writing is reported in this document. This report will be amended as additional test sites are surveyed. HCFC-I 23 was initially assigned an Allowable Exposure Limit (AEL) of 100 ppm5. Ongoing toxicity testing resulted in a lowering of the AEL from 100 ppm to 10 ppm. The resulting question is, "Can centrifugal chillers be safely operated with a refrigerant with an AEL of 10 ppm?" Prior surveys conducted by Du Pont had indicated that the answer is yes. These surveys indicated that during normal operation of hermetic chillers, the concentration of refrigerant in the equipment room was at most one to three ppm. The instruments used for measurement indicated a concentration of one to three ppm. There is reason to question whether there was actual refrigerant present in concentrations of one to three ppm or if the indication was due to baseline drift of the instrumentation. It is certain, however, that refrigerant was not detected above the one to three ppm indicated by the instrumentation.

During servicing, as long as recommended recovery and recycling practices were observed, these prior surveys also indicated that the concentration was below eight ppm. In view of the reduced margin of safety with the reduction in the AEL, Trane and Du Pont agreed that it was appropriate to conduct additional studies to corroborate the data from the previous surveys. The scope of this study was expanded to include additional operating installations in the field. In addition to the monitoring method previously used, a separate method was incorporated which allowed for quantitation below one ppm. Test results are documented by an outside engineering laboratory.

An Allowable Exposure Limit (AEL) is an occupational inhalation exposure limit for chemicals set by the chemical manufacturer, in this case Du Pont, for substances that do not yet have a Threshold Limit Value (TLV) assigned by the American Conference of Governmental Industrial Hygienists. The AEL of 10 for HCFC- 123 was set by the Du Pont AEL committee. An AEL is a time weighted average of the concentration that a typical operator or service technician could be exposed to eight hours per day, 40 hours per week, for an entire operating career without experiencing any harmful effects.

2

Test Site Selection Twelve equipment rooms containing Trane hermetic centrifugal chillers operating with HCFC-123 have been tested as of this writing. The equipment rooms had a variety of configurations. They ranged from a new building with only Trane HCFC-I 23 centrifugal chillers to existing installations including at least one Eane HCFC-123 centrifugal chiller plus a variety of additional chiller types, refrigerants, ages and manufacturers. The installations were representative of the types of applications typical for centrifugal chillers. The appkations included five manufacturing facilities, two medical centers, three large office facilities and two large educational institutions. None of the installations are owned or operated by Trane, Du Pont or their affiliates. In order to protect the rights of the owners of the installations, only the location of the sites, and not the names of the installations, are reported in this document.

Testing Methodology Two testing methods were used at each site: Activated charcoal tubes followed by analysis with a laboratory gas chromatograph, and

the site. The methodology and results are described for each methodb Activated Charcoal Tubes Air Samples, Laboratory Gas Chromatograph Analysis Each equipment room was sampled using activated charcoal tubes (400/200 mg). Activated charcoal is the most widely used and accepted adsorbent for the collection and concentration of organic vapors for air quality sampling. The activated charcoal method is recognized by NlOSH (National Institute for Occupational Safety and Health)/OSHA (Occupational Safety and Health Administration) and ACGIH (American Conference of Governmental Industrial Hygienists). The method that was used to collect and analyze the air samples is based on NlOSH Method 1020. In this method, the air sample is taken by drawing a known volume of air through an activated charcoal tube to trap any organic vapors present. The collected samples are then sent to a lab for analysis using a gas chromatograph. Two air samples were taken for each equipment room. The air samples were taken at two points, a distance from the floor of both five feet and eighteen inches. These two samples were taken in the same vertical plane in order to determine the HCFC-I 23 distribution at the sample region. Each point, one at 18 inches and one at five feet, was sampled by using a pair of activated charcoal tubes (400/200 mg) hooked-up in series. A pair of tubes were hooked up in series to insure that all HCFC-I 23 was collected. The first tube in the series is the sample tube and the second tube is the breakthrough tube. Each of the tubes in the pair was analyzed separa?e!y. !n this study, n ~ ! HCFC-123 was detected in any of the breakthrough tubes. As a result, all the HCFC-123 vapors were collected in the first sample tube and only the results from the sample tube are reported in this document.

Portable gas chromatograph analysis at

The sampling location within the equipment mom varied from site to site. In all cases, the sample point location with the highest possible HCFC-I 23 concentration was selected. To find this location the chiller(s) and the area(s) around the chiller(s) were first checked for refrigerant leaks with a portable gas chromatograph (G.C.). The charcoal tube samples were taken in close proximity to any refrigerant leaks that were found in order to determine the distribution of HCFC-123 at that point. In the cases where no leaks were detected at the unit, a stagnant or low flow air zone was selected for the sample point. If the ventilation in the room was sufficient that there were no stagnant or low flow air zones, a sample was taken at one end of the condenser, which represents the most likely area that a refrigerant leak out from the chiller would occur. Once the samples were collected, the tubes were sealed and sent to an Industrial Hygiene Laboratory accredited in all Proficiency Area Testing (PAT) from the American Industrial Hygiene Association. Samples from all but the first two sites were sent to Travelers Insurance Company Loss Prevention and Engineering Laboratory. Traveler's is a full service industrial hygiene laboratory founded in 1920, AlHA #80.

3

The analysis method used is based on NIOSH Method 1020. The charcoal from the sealed air sample tubes is transferred to a small stoppered vial and the compounds are desorbed with Carbon Disulfide (CS,). A known amount of the desorbed sample is then introduced into the gas chromatograph equipped with a flame ionization detector. The output of the measurement device is compared with known standards to determine the presence and quantity of contaminants. The results from these activated charcoal tubes are reported for each site. Testing for recovery and breakthrough of HCFC-123 in the activated charcoal tubes revealed that there was no breakthrough in four hours of sampling at a flow rate of 50 dmin, maintaining the integrity of the samples. The Limit of Quantitation (LOO) is the smallest amount of HCFC-123 which can be reproducibly detected by a given sampling and analysis method. The LOQ's for this method for the twelve sites ranged from 0.33 ppm to 0.50 ppm (parts per million parts of air by volume of HCFC-123). Parts per million is a standard unit of measure used to describe the amount of contaminant detected on the activated charcoal tubes. The LOQ varies as a function of the amount of air volume pumped through the charcoal tube. The exact amount of time over which the samples were collected was recorded for each activated charcoal tube. To be scientifically correct, in the cases where laboratory analysis of the charcoal tubes did not detect the presence of HCFC-I 23 the test results are reported as "less than the Loa" The test results are reported as Time Weighted Averages (TWA) based on four hours of sampling at 50 cdmin, unless otherwise noted. TWA refers to concentrations of airborne materials which were collected for a certain time duration, usually eight hours. After consultation and review by a Certified Industrial Hygienist (CIH), it was determined that the results for a four hour sample would be representative of an eight hour period. The LOQ (ppm) is inversely proportional to the sample time. As an example, if the samples in this study were collected over an eight hour workday, then the LOQ would be one-half of the four hour values reported. If they were collected over a two hour work day, then they would be twice the value of the four hour numbers. For accurate test results, it is important to know the exact amount of time over which the samples were collected.

Portable Gas Chromatograph Analysis The equipment moms were also sampled using a portable gas chromatograph (G.C.). This instrument uses a process in which the components of a gas mixture, in this case air and HCFC-123, are separated from one another by injecting the sample into a carrier gas stream (air and hydrogen for this application) which is passing through a column of packing material. The different components move through this column at different rates, consequently, they appear separate at the column end where they are detected and measured by a flame ionization detector (FID). The individual components are identified based on the amount of time it takes them to travel the length of the column. This detector is sensitive to all carbon compounds and has a wide dynamic range. The portable G.C was operated by qualified Du Pont field service specialists. The instrument was calibrated in their laboratory prior to the testing of the equipment moms. This device was used to provide a "spot" test which could be immediately analyzed at the site. This type of testing gives a snapshot value that reflects the concentration at that particular moment in time at that particular sample point within the equipment room. This is not a time weighted average. The values obtained in this manner would be influenced more by the air movement in the room than the samples taken by the activated charcoal tubes. The portable G.C. was used to check for leaks at all fmings, seals and joints on the chillers. Additionally, the area in the equipment room around the chillers was analyzed. The portable G.C. is slightly less sensitive than the activated charcoal tube method previously described. The portable G.C. has an LOO of 1.1 ppm, compared to 0.33 to 0.56 ppm LOO for the activated charcoal tube method.

Summary Of Test Results A total of 12 sites have been tested representing the broad range of applications for centrifugal chillers. For 10 of the 12 sites, the charcoal tube tests showed that no HCFC-I 23 was detected and the results were reported as LT (Less Than) values in ppm based on the LOO (Limit of Quantitation) for that test. These values ranged from LT 0.33 ppm to LT 0.56 ppm depending on the exact amount of time and volume of air collected for that sample. Because these numbers are based on the LOQ the concentration of HCFG 123 may or may not be present at levels below this concentration, but we can be certain that they are not above the LOQ A leak survey using the portable G.C. on the HCFC-123 chillers and areas was done at each of these ten sites, and at two of the sites a low level refrigerant leak was detected coming from a field-installed fitting on the chiller. The ventilation at these two sites was sufficient to prevent a measurable concentration build-up of

In only two cases was the presence of HCFC-I 23 detected with the charcoal tube method: The first case was the Carson, California site which had results from the charcoal tube tests of 0.49 ppm at the five-foot level and 0.64 ppm at the Isinch level. A leak survey was done using the portable G.C. on all four chillers and the area around them at this site. No HCFC-123 was detected, and the end of the condenser of one of the chillers was chosen as the sample point location. There were, however, several used HCFC-123 drums in the equipment room. There was no mechanical ventilation as the ceiling vent fans were not turned on at the time of sampling. At approximately six inches over the empty HCFC-123 drums, 2.5 ppm was detected by the portable G.C. Therefore, the source of the small amount of HCFC-123 that was detected was from either the HCFG123 drums or another very small leak source that was not detected by the portable G.C. The second case where HCFC-123 was detected by the charcoal tubes was at the Melbourne, Florida site. This site was visited twice. On the initial visit, two leak sources were detected, one from the purge vent line, and another from a leaking half empty drum of refrigerant. These conditions were corrected and the site was measured on a second visit.

HCFC-I 23.

4

On the initial visit to the Melbourne site, charcoal tube test results showed 5.92 ppm and 13.6 ppm. A leak survey was done using the portable G.C. on the chiller and the area around the chiller. No leaks were detected on the chiller unit itself, however, a leak was detected on the purge vent line. In fact, the leak was significant enough that refrigerant was visibly dripping from a field-installed rubber hose connection. It was later confirmed that the rubber hose was not compatible with HCFC- 123. The ventilation in the room was such that a stagnant air zone was located in a large corner of the room. A half empty HCFC-I 23 drum was also visibly leaking into the room. The sample point for the charcoal tubes was located in the stagnant air zone in close proximity to the leaking drum. Prior to the second visit, the purge vent line was fixed and the drums of HCFC- 123 were removed from the room. A second set of test samples were taken with results less than the LOQ's of 0.33 ppm and 0.56 ppm which is in-line with the other 11 sites. At two sites, additional information was collected to assess the concentration of HCFC-123 during a refrigerant transfer. A refrigerant transfer of approximately 300 pounds into and out of the chiller was performed. Two more four-hour charcoal samples were collected at five feet and 18 inches. These samples were collected after the first four-hour samples during normal operation. Test results were the same. The level of HCFC-123 remained the same even during a refrigerant transfer. The second site was tested in the Same manner with the same results.

Conclusions And Standard 15R. Ventilation of the equipment room, proper installation of the purge vent piping and maintenance of the chiller play a key role in keeping the level of HCFC-123 within

Recommendations In considering the significance Of these findings, it is important that the following factors are taken into acceDtable limits. account: The charcoal tube test results show that even with the lowering of the Du Pont AEL (Allowable Exposure Limit) from 100 ppm to 10 ppm, 11 of the 12 sites tested were an order of magnitude less than the established AEL of 10 ppm. The portable G.C. results corroborated the charcoal tube results and showed that even the instantaneous concentrations of HCFC-123 were at least nine times below the AEL of 10 ppm at 11 of the 12 sites. In no case was the chiller itself the

The data that has been accumulated indicates that during normal operation of hermetic chillers, the concentration of HCFC-123 in the equipment room is well below the AEL of 10 ppm. It is critical when considering the safety of the application of refrigerants in equipment rooms to understand that the AEL represents a concentration that a typical operator or service technician could be exposed to eight hours per day, 40 hours per week, for an entire operating career without experiencing any harmful effects.

contributing factor to measurable levels Finally, it is important to remember that of ~ c ~ c - 1 2 3 in the equipment room. When a refrigerant transfer was

below the AEL of 10 ppm. There were only two cases where HCFC-123 was determined to be

levels: a. At one of the test sites, Carson,

California, refrigerant concentrations less than one ppm were detected. In this case, there were HCFC-123 refrigerant drums that had been improperly sealed and were leaking into the equipment room.

b. One test site, Melbourne, Florida, was found to contain HCFC-I 23 concentrations above the AEL of 10 ppm. The sources of HCFC-123 at this site were improperly sealed refrigerant drums which were leaking and a low level leak at the purge vent line which resulted from improper field installation and use of incompatible piping materials. These leak sources were fixed and the site was retested with results below the minimum quantifiable levels and in-line with the other 11 sites. These test results confirm the conclusions from previous surveys and operational experience that have shown that HCFC-123 can be applied in refrigeratiodair conditioning systems with average exposure well below the revised AEL of I O ppm during normal operation. Additionally, these findings emphasize the importance of following proper refrigerant handling and storage procedures and the installation recommendations of ASHRAE

the greatest danger associated with most refrigerants in centrifugal chiller

toxicological effects, but rather their acute exposures. All halogen refrigerants are heavier than air, they all displace oxygen and can all cause asphyxiation. Correspondingly, as an

refrigerants more safely. To this end, both Trane and Du Pont gratefully acknowledge the leadership being provided by the ASHRAE 34R and 15R Standards Committees.

performed, the concentration of HCFC- applications is not their chronic 23 remained an order of magnitude

present above minimum quantifiable industry, we must learn to treat all

5

Test Report

d-----er==r

Site Location: Abilene, Texas The site was visited on July 26, 1991 and the area samples were collected from 10:06 AM to 213 PM. One Trane HCFGI 23 chiller and four other R-I 1 chillers were located in the equipment room. There were three refrigerators stored in the mom along with drums of R-I 1 and R-I 1 with oil. The HCFC-123 chiller was checked for refrigerant leaks with the portable G.C. and no leaks were found. The mom had mechanical ventilation, but at the time of sampling it was not operating. However there were stagnant air zones located at the corners of the equipment room away from the chillers. The activated charcoal

Site Diagram

62"

tube samples were collected next to the condenser. The results of the charcoal tube tests were less than the LOO of 0.37 ppm at 18 inches and 0.38 ppm at 5 feet. These numbers are based on the Limit of Ouantitation (LOO) of the test methodology and HCFC-123 may or may not be present in concentrations less than these values, but it is certain that it is not present above 0.38 ppm.

EMULSIFIABLE 3 REFRIGERATORS CHLOROBENZENE

2 DRUMS R-11 10 DRUMS R-llx)IL 'm I,,

1 TRANER-123 R-11 UNIT

[ 6' x 10' OVERHEAD DOOR

VENTILATION (2% x 8' VENTILATIOL 20'

1 '\ INLETS

LOCATION OF CHARCOAL SAMPLES 1 @ 5 : 1 @18" SAME VERT PLANE

INLEI ' ABOVE I

DOOR)

CEILING HEIGHT: 20'

6

Refrigerant Chiller # Start Date Type Charge (Lb) # Of Starts

HCFC-123 750 * * 61 0 R-1 1

R-1 1 * 680 4 R-1 1 1 800 1390

Equipment Room Configuration Yes No

Ventilation 0 Natural Mechanical

0 H Ventilation meets minimum requirements of ASHRAE Standard 15R. 0 H Tight fitting doors. H 0 Rupture disk piped outside. H 0 Purge piped outside. 0 H Drip leg present on purge piping. 0 H HCFC-123 leaks detected with portable G.C. 0 Kl Room air conditioned.

Temperature H 0 Other sources of refrigerant in the equipment room.

3 Refrigerators, R-I 1 Units

Run Time (Hours)

1866 49774 55537

*

Test Results Activated Charcoal Tubes Method: Gas Chromatograph Sample @I 18 inches: LT 0.37 Results are 4 hour time weighted averages (parts per million)

Sample @I 5 feet: LT 0.38

Portable Gas Chromatograph Results (Du Pont) Date Sampled

Point 1 2 3 4 5 6 7 8

PPM Point PPM ND 9 ND 10 ND 11 ND 12 ND 13 ND 14 ND 15

16

Point 17 18 19 20 21 22 23 24

PPM Point PPM 25 26 27 28 29 30 31 32

Special Notes: 1. Activated charcoal tubes were calculated using a flow rate of 50 Camin. 2. All results are reported to two significant figures unless otherwise stated in writing. 3. L.T. = Less than values based on the method limit of quantitation (LOQ). The concentration may or may not be

N.D. = None detected based on method limit of quantitation (LOO). The concentration may or may not be present at levels below this concentration.

present at levels below this concentration. 4. Test results documented by certificate of analysis from Travelers Loss Prevention And Engineering Laboratories.

7

Test Report

Site Location: Austin, Texas The site was visited on July 25, 1991 and the area samples were collected from 11:20 AM to 320 PM. Two Tmne HCFC-123 chillers and four R-22 units were located in the equipment room. The HCFC-123 chillers were checked for refrigerant leaks with the portable G.C. and no leaks were found. The mom had mechanical ventilation that met the minimum requirements of ASHRAE Standard 15R. The activated charcoal tube samples were collected at one end of the condenser. The results of the charcoal tube tests were less than the LOQ of 0.38 ppm at 18 inches and 0.37 ppm at 5 feet. These numbers are based on the Limit of Quantitation (LOO) of the test methodology and HCFC-123 may or may not be present in concentrations less than these values, but it is certain that it is not present above 0.38 ppm.

Site Diagram

& & &

DOOR 1 II

/-OXIDIZER

c,a DOOR

\-POTASSIUM HYDROXIDE

0 0 0 0

DOOR INTAKE (8-121 CEILING HEIGHT: 30’

8

Site Information

Chiller # H Refrigerant Run Time Start Date Type Charge (Lb) # Of Starts (Hours)

2-12-91 HCFC-123 2390 3 2667 2-12-91 HCFC-123 2390 1 1260


Ventilation 0 Natural H Mechanical

IH 0 Ventilation meets minimum requirements of ASHRAE Standard 15R. IH 0 Tight fitting doors. IH 0 Rupture disk piped outside. IH 0 Purge piped outside. 0 H Drip leg present on purge piping. 0 IH HCFC-123 leaks detected with portable G.C. 0 IXI Room air conditioned.

Temperature j3OJ H 0 Other sources of refrigerant in the equipment room.

Water Cooler, R-22 Units



Portable Gas Chromatograph Results (Du Pond Date Sampled

Point PPM 1 ND 2 ND 3 ND 4 ND 5 ND 6 ND 7 ND 8 ND

Point PPM 9 ND

10 ND 1 1 ND 12 ND 13 ND 14 ND 15 16

Point PPM 17 18 19 20 21 22 23 24

Point 25 26 27 28 29 30 31 32

PPM

Special Notes: 1. Activated charcoal tubes were calculated using a flow rate of 50 Cumin. 2. All results are reported to two significant figures unless otherwise stated in writing. 3. L.T. = Less than values based on the method limit of quantitation (LOQ). The concentration may or may not be

N.D. = None detected based on method limit of quantitation (LOQ). The concentration may or may not be present at levels below this concentration.


9

Test Report

Site Location: Blacksburg, South Carolina The site was visited on August 8, 1991 and the area samples were collected from 934 AM to 1 :34 PM. There was one Trane HCFC-I 23 chiller located in this equipment room. The HCFC-123 chiller was checked for refrigerant leaks with the portable G.C. and no leaks were found. The room had natural ventilation. The activated charcoal tube samples were collected at one end of the condenser. The results of the charcoal tube tests were less than the LOQ of 0.35 ppm at 18 inches and 0.35 ppm at 5 feet. These numbers are based on the Limit of Quantitation (LOQ) of the test methodology and HCFC-123 may or may not be present in concentrations less than these values, but it is certain that it is not present above 0.35 ppm.

Site Diagram

- "'1

LOCATION OF- CHARCOAL SAMPLES

1 @ 5'. 1 @ 18" SAME VERT PLANE

NON-POWERED - CEILING VENT

DooRL COOLING TOWER

TREATMENT CHEMICALS

HANDLER

166

CEILING HEIGHT: 26'

10

Site Information Site Location: Blacksburg, South Carolina

Trane Units

Site Test Date: 8-8-91 Time: 934AM

Chiller # H Non-Trane Units Refrigerant

H I 1 *denotes Not Available


Ventilation iH Natural 0 Mechanical

0 El Ventilation meets minimum requirements of ASHRAE Standard 15R. 0 H Tight fitting doors. El 0 Rupture disk piped outside. iH 0 Purge piped outside. 0 El Drip leg present on purge piping. 0 iH HCFC-123 leaks detected with portable G.C. 0 H Room air conditioned.

0 El Other sources of refrigerant in the equipment room. Temperature @OJ

Test Results Activated Charcoal Tubes Method: Gas Chromatograph Sample @ 18 inches: LT 0.35 Results are 4 hour time weighted averages (parts per million)

Sample @ 5 feet: LT 0.35

Portable Gas Chromatograph Results (Du Pont)

Point 1 2 3 4 5 6 7 8

PPM Point PPM Point PPM ND 9 17 ND 10 18 ND 11 19 ND 12 20 ND 13 21 ND 14 22 ND 15 23

16 24

Point 25 26 27 28 29 30 31 32

PPM

Special Notes: 1. Activated charcoal tubes were calculated using a flow rate of 50 Cumin.

3. L.T. = Less than values based on the method limit of quantitation (LOQ). The concentration may or may not be

N.D. = None detected based on method limit of quantitation (LOQ). The concentration may or may not be

4. Test results documented by certificate of analysis from Travelers Loss Prevention And Engineering Laboratories.

2. All results are reported to two significant figures unless otherwise stated in writing. - ~~

present at levels below this concentration.


11

Test Report

Site Location: Carson, California The site was visited on July 30, 1991

ventilation as the ceiling vent fans were not turned on at the time of sampling. The activated charcoal tube samples were collected at one end of the

and the area samples were collected from 11:09 AM to 309 PM. Four lane HCFC-123 chillers were located in the equipment room. The four HCFC-123 chillers were checked for refrigerant leaks with the portable G.C. and no leaks were found. There were nine empty HCFC-I 23 drums located in the room. A portable G.C. sample was taken at six inches over the top of one of the empty drums and 2.5 ppm was detected. There was no mechanical

condenser. The results of the charcoal tube tests were 0.64 ppm at 18 inches and 0.49 ppm at 5 feet. Therefore, the source of the small amount of HCFC-123 that was detected was from either the HCFC-I 23 drums or another very small leak source that was not detected by the portable G.C.

Site Diagram R-123 DRUMS

(EMPTY) SAMPLE POINT 29

PLATE FRAME HEAT EXCHANGER

HAUST FAN LOCATION OF MEZZANINE IN ROOF CHARCOAL SAMPLES OF CHEM-PRO IN ROOF

4' x 4' 1 @ S: 1 @ 18" WATER TREATMENT 4' x 4' SAME VERT PLANE

CEILING HEIGHT: 30'

12

Chiller #

4

Non-Trane Units Refrigerant

E l 1

Refrigerant Run Time Start Date Type Charge (Lb) # Of Starts (Hours)

7-20-91 HCFC-123 2280 6 161 7-20-91 HCFC-I23 2280 7 98 7-20-91 HCFC-123 2280 7 3 7-20-91 HCFC-123 2280 4 38


Ventilation 0 Natural KI Mechanical

0 KI. Ventilation meets minimum requirements of ASHRAE Standard 15R. 0 El Tight fitting doors. H 0 Rupture disk piped outside. H 0 Purge piped outside. 0 El Drip leg present on purge piping. 0 0 H Room air conditioned.

Ed 0 Other sources of refrigerant in the equipment room.

HCFC-123 leaks detected with portable G.C.

Temperature E HCFC-123 Drums

Test Results Activated Charcoal Tubes Method Gas Chromatograph Sample @ 18 inches: 0.64 Sample @ 5 feet: (MJ Results are 4 hour time weighted averages (parts per million)

Portable Gas Chromatograph Results (Du Pont) Point PPM Point PPM

1 ND 9 ND 2 ND 10 ND 3 ND 11 ND 4 ND 12 ND 5 ND 13 ND 6 ND 14 ND 7 ND 15 ND 8 ND 16 ND

Point PPM 17 ND 18 ND 19 ND 20 ND 21 ND 22 ND 23 ND 24 ND

Point PPM 25 ND 26 ND 27 ND 28 ND

30 31 32

29 2.5

Special Notes: 1. Activated charcoal tubes were calculated using a flow rate of 50 Cumin. 2. All results are reported to two significant figures unless otherwise stated in writing. 3. L.T. = Less than values based on the method limit of quantitation (LOO). The concentration may or may not be



13

Test Report

Site Location: South Carolina

The site was visited On August 9, 1991 and the area samples were collected from 8:50 AM to 1250 PM. There Was one Trane HCFC-I 23 chiller and one R-22 unit located in this equipment room. The HCFC-123 chiller was checked for refrigerant leaks with the portable G.C. and no leaks were found. R-22 was detected in the room with the portable G.C. and the source was tracked to the R-22 unit which did have a leak. The room had mechanical ventilation, but it was significantly undersized and virtually ineffective. The activated charcoal tube samples were collected at one end of the condenser.

The results of the charcoal tube tests were less than the LOQ of 0.33 ppm at 18 inches and 0.33 ppm at 5 feet. These numbers are based on the Limit of Quantitation (LOO) of the test

may not be present in concentrations less than these values, but it is certain that it is not present above 0.33 ppm.

methodology and HCFG123 may or ~ _ _

Site Diagram

I_ 3 0 7

LEAK DETECTED ON A-22

r - POWER PANEL

AIR INLET AIR 4 x 6 4' -

WATER - WATER

7

LOCATION OF CHARCOAL SAMPLES

SAME VERT PLANE 1 63 5 , 1 63 18"

EXHAUST FAN Y X Y

INLET x 6 '

CEILING HEIGHT: 12'

14

Site Information

Refrigerant Start Date Type Charge (Lb) # Of Starts

8-8-9 1 HCFC-123 900 1 * * R-22 550

Site Location: Charleston, South Carolina

Tmne Units

Run Time (Hours)

31 *

S i e Test Date: 8-9-91 Time: 850 AM

I I I I

Non-Pane Units Refrigerant Type

*denotes Not Available


Ventilation 0 Natural IH Mechanical

0 H Ventilation meets minimum requirements of ASHRAE Standard 15R. 0 H Tight fitting doors. W 0 Rupture disk piped outside. El 0 Purge piped outside. 0 IH Drip leg present on purge piping. 0 IH HCFC-123 leaks detected with portable G.C. 0 H Room air conditioned.

0 H Other sources of refrigerant in the equipment room. Temperature



Portable Gas Chromatograph Results (Du Pont) Point PPM Point PPM

1 ND 9 2 ND 10

~~~~~

3 ND 11 4 ND 12 5 ND 13 6 ND 14 7 ND 55 8 16

Point 17 18 19 20 21 22 23 24

PPM Point PPM 25 26 27 28 29 30 31 32

Special Notes: 1. Activated charcoal tubes were calculated using a flow rate of 50 CC/min. 2. All results are reported to two significant figures unless otherwise stated in writing. 3. L.T. = Less than values based on the method limit of quantitation (LOO). The concentration may or may not be

N.D. = None detected based on method limit of quantitation (LOQ). The concentration may or may not be present at levels below this concentration.


15

Test Report

S i Location: Indianapolis, Indiana The site was visited on August 1,1991 andthe8fBaSampleSWerecdWed from 11:15 AM to 315 PM. Them wem two T m HCFG123 chillers located in thii equipment room. The HCFG123 chillers were checked for refrigerant leaks witt~ the portsMe G.C. and a low level leak was detected at a field .nStalled pumpout vapor connect~m on the top of the condenser of one of the chillers The portabk G.C. sample point #7 shows 1.7 ppmatthis leak. Even though this leak was very small, it could not be completely stopped with tightening. All of the dher G.C sample points found no HcFGl23 detected. Themhadmecharuca . lventilation that met the minimum requirements of# ASHRAE Standard 1 s . The activated charcoal tube samples were collected near wherethe leak was found on the atndemw. The resultsofthe charcod tube tests wem less than the LOQof 0.40 ppm at 18 inches and 0.40 ppm at 5- These numbers am based on the Limit

(Loa) of the test &(ham” . .

S i Diagram

methodology and HCFG123 may or may not be present in concentrations less than these values, but it is certain that it is not present above 0.40 ppm. At this site a refrigerant transfer was performed. Approximately 300 pounds of refrieerant was pumped out ofthe chiller and then pumped back into the chiller. A separate set of activated CharcoaltubeSampleSWereCdlected during thii operation from 700 AM to 11$0 AM on August 1,1991. The separate testing done during thii operation revealedtheconcentrationof HCFG123 did not increase, it remained the same as during normal ope”. The results ofthe charcoal tube tests taken during this rehigerant transfer wem less than the LOQ of 0.40 ppm at 18inChesand 0.40 ppm at 5 feet These numbers are based on the Limit

(LOQ) of the test o f Q u a m ” methodology and HCFGl23 may or may not be present in concentrations less than thegevalues, but it is certain that it is not present above 0.40 p~m.

. .

16

Chiller # H. Equipment Room Configuration Yes No

Ventilation Natural H Mechanical

H 4 Ventilation meets minimum requirements of ASHRAE Standard 15R. 0 H Tight fitting doors. El 0 Rupture disk piped outside. H 0 Purge piped outside. 0 H Drip leg present on purge piping. H 0 HCFC-123 leaks detected with portable G.C. H 0 Room air conditioned.

Temperature e 0 E3 Other sources of refrigerant in the equipment room.

Refrigerant Run Time Start Date Type Charge (Lb) # Of Starts (Hours)

4-91 HCFC-123 700 76 740 4-91 HCFC-123 700 24 485

Test Results Activated Charcoal Tubes Method Gas Chromatograph Sample @ 18 inches: LT 0.40 Results are 4 hour time weighted averages (parts per million)


Portable Gas Chromatograph Results (Du Pond

Point 1 2 3 4 5 6 7 8

PPM Point PPM Point PPM ND 9 ND 17 ND 10 18 ND 11 19 ND 12 20 ND 13 21

14 22 23

ND

ND 16 24

“I- . -.-. 1.11 13

Point PPM 25 26 27 28 29 30 31 32

Special Notes: 1. Activated charcoal tubes were calculated using a flow rate of 50 Camin. 2. All results are reported to two significant figures unless otherwise stated in writing. 3. L.T. = Less than values based on the method limit of quantitation (LOQ). The concentration may or may not be

present at levels below this concentration. N.D. = None detected based on method limit of quantitation (LOQ). The concentration may or may not be


17

Test Report

Site Location: Los Angeles, California The site was visited on July 29, 1991 and the area samples were collected from 11 :I 1 AM to 3:11 PM. One Trane HCFC-I 23 chiller and one absorption unit were located in this equipment room. The HCFC-123 chiller was checked for refrigerant leaks with the portable G.C. and no leaks were found. There were four empty drums of HCFC-123, one partial drum of R-1 1, one partial drum of R-22 and an ice machine located in the room. The room had natural ventilation. The activated charcoal tube samples were collected at one end of the condenser.

Site Diagram

POWERED ROOF VENT 32“ x 32” r

The results of the charcoal tube tests were less than the LOQ of 0.39 ppm at 18 inches and 0.39 ppm at 5 feet. These numbers are based on the Limit of Quantitation (LOQ) of the test methodology and HCFC-123 may or may not be present in concentrations less than these values, but it is certain that it is not present above 0.39 ppm.

NON-POWERED CEILING VENT (3) 32” X 32”

I 0 0 10 x 12’

ELECTRICAL GEAR

LOUVERED VENT OVER

DOOR

5 6 7

t 12’x 12‘ ‘ I

1 0 NON-POWERED OPEN PIT WALL VENT

---7 L .


1 @ 5: 1 @ 18“ SAME VERT PLANE CEILING HEIGHT: 25’

18

Site Location: Los Angeles, California

Chiller ## 1

Site Information

- " Start Date Type Charge (Lb) # Of Starts (Hours)

7-1 9-91 HCFC-123 770 8 242

Site Test Date: 7-29-91 Time: 11:ll AM

liane Units

Non-Tmne Units Refrigerant


Ventilation Ki Natural 0 Mechanical

0 E4 Ventilation meets minimum requirements of ASHRAE Standard 15R. 0 H Tight fitting doors. IXI I7 Rupture disk piped outside. H 0 Purge piped outside. H 0 Drip leg present on purge piping. 0 HCFC-123 leaks detected with portable G.C. 0 IXI Room air conditioned.

Kl 0 Other sources of refrigerant in the equipment room. Temperature E Ice Machine, Drums Of R12, R22, R11, Empty R-123 Drums

rest Results Activated Charcoal Tubes Method: Gas Chromatograph Sample @ 18 inches: LT 0.39 Results are 4 hour time weighted averages (parts per million)


Portable Gas Chromatograph Results (Du Pont) Point PPM Point PPM Point PPM

1 ND 9 17 2 ND 10 18 3 ND 11 19 4 ND 12 20 5 ND 13 21 - 6 ND 14 22 i ND 15 23 8 16 - 24

Point PPM 25 26 27 28 29 30 31 32

Special Notes: I. Activated charcoal tubes were calculated using a flow rate of 50 Cumin. 2. All results are reported to two significant figures unless otherwise stated in writing. 3. L.T. = Less than values based on the method limit of quantitation (LOO). The concentration may or may not be

present at levels below this concentration. N.D. = None detected based on method limit of quantitation (LOO). The concentration may or may not be


19

Test Report

site Location: Omaha, Nebraska The site wasvisited on August2,1991 and the area samples were collected from 9.38 AM to 1.S PM. One T m HcFc123 chiller and four other R-22 units were located in thii equipment room. The HCFG123 chiller was

portaMe G.C. and no leaks were found. Them were nine d"s of R-22 located in the room.The room had natural VBnttlBtKUI. The activated c)larcoal tube sampleswerecollected atone end of th8a"er.

c h e c k e d f o r ~ l e a k s w i t h t h e

. .

Site Diagram

The results of the charcoal tube tests were less than the Loo of 0.40 ppm at 18 inches and 0.40 ppm at S f e e t These numbers BCB based on the Limit of chantitation (Loo) ofthe test methodology and HCFGl23 may or maynotbepresentinconcentrstions less than thesevalues, but it is certain that it is not present above 0.40 ppm.

-

I

CEILING HEIGHT: 32'

20

Chiller #


Ventilation El Natural 0 Mechanical

Ci El Ventilation meets minimum requirements of ASHRAE Standard 15R. 0 El Tight fitting doors. H 0 Rupture disk piped outside. H 0 Purge piped outside. H 0 Drip leg present on purge piping. 0 H HCFC-123 leaks detected with portable G.C. 0 N Room air conditioned.

Temperature H 0 Other sources of refrigerant in the equipment room.

R-22 Units, Drums Of R-22

Refrigerant Run Time , StartDate Tvpe Charge (lb) # Of Starts (Hours)

7-91 HCFC-123 1200 31 72


Sample @J 5 feet: LT 0.40

Portable Gas Chromatograph Resutts (Du Pont) Point PPM Point PPM

1 ND 9 ND 2 ND 10 3 ND 11 4 ND 12 5 ND 13 6 ND 14 7 ND 15 8 ND 16

Point 17 18 19 20 21 22 23 24

PPM Point PPM 25 26 27 28 29 30 31 32

Special Notes: 1. Activated charcoal tubes were calculated using a flow rate of 50 CUmin. 2. All results are reported to two significant figures unless otherwise stated in writing. 3. L.T. = Less than values based on the method limit of quantitation (LOO). The concentration may or may not be



21

Test Report

s i Location: Orlando, Florida The site was visited on July 9,1991 and the ama sampleswerecdlected from AM to 940 AM. This was the first ofthe test sites to be visited. We required a quick determination of the levels of HCFG123 in the equipment mom, therefore the activated charcoal tube (4oonoomg) samples were collected at a flow rate of 500 cchnin. A total of 20 liters of air was collected with no HCFG123 detected on the breakthrough tube. The samples wem tested by a fully accredited industrial hygiene lab other thantheTravelersLoss Revention and Engineering lab. If any HCFG123 had been detected on the breakthrough tubesthen the samplecdlection method would have been invalid and the numbers for thii test would have beenquestionable.Thedatafromthis

S i Diagram

site is included in thii report in order to maintain a complete reporting of all sites tested and all data collected. Two Trane HCFG123 chillers were located in the equipment room. The HCFGl23 chillers were checked for refriaerant leaks with the portable G.C. and no leakswerefound. The room had mechanical ventilation that met the minimum requirements of ASHRAE Standard 15R. The activated charcoal tube samples were collected directty in-between the two chillers. The resub ofthe charcoal tube tests were less than the Loo of 0.50 ppm at 18 inchegand 0.50 ppm at 5feet These numbem are based on the Limit of Qlantitati (LOQ) ofthe test methoddogy and HCFG123 may or maynotbepmsentinc"&m less than these values, but it is certain that it is not present above 0.50 ppm.

CEILING HEIGHT 16'

22

Site Information

Refrigerant

2-91 HCFC-123 1020 2-9 1 HCFC-123 1020

Start Date Type Charge (Lb) # Of Starts * *

Run Time (Hours)

* ?+

Non-liane Units Refrigerant Type R *denotes Not Available


H iJ Ventilation meets minimum requirements of ASHRAE Standard 15R. E4 0 Tight fitting doors. H 0 Rupture disk piped outside. H 0 Purge piped outside. 0 H Drip leg present on purge piping. 0 H HCFC-123 leaks detected with portable G.C. H 0 Room air conditioned.

H 0 Other sources of refrigerant in the equipment room.

Ventilation 0 Natural E4 Mechanical

Temperature

Ice Machine, Refrigerator, Water Fountain

Test Results Activated Charcoal Tubes Method Gas Chromatograph Sample Q 18 inches: LT 0.5 Results are time weighted averages (parts per million) taken for 20 minutes.


Portable Gas Chromatograph Results (Du Pont) Point PPM Point PPM Point PPM Point

1 ND 9 ND 17 ND 25 2 ND 10 ND 18 ND 26 3 ND 11 ND 19 27 4 ND 12 ND 20 28 5 ND 13 ND 21 29 6 ND 14 ND 22 30 7 ND 15 ND 23 31 8 ND 16 ND 24 32

PPM

Special Notes: 1. Activated charcoal tubes were calculated using a flow rate of 500 CC/min. 2. All results are reported to two significant figures unless otherwise stated in writing. 3. L.T. = Less than values based on the method limit of quantitation (LOO). The concentration may or may not be



23

Test Report

Site Location: Rootstown, Ohio The site was visited on July 30, 1991 and the area samples were collected from 830 AM to 1230 PM. One Trane HCFC-123 chiller and one absorption unit were located in this equipment room. There were seven empty drums of HCFG123 stored in the room. The HCFC-I 23 chiller was checked for refrigerant leaks with the portable G.C. and no leaks were found. The room had mechanical ventilation that met the minimum requirements of ASHRAE Standard 15R. The activated charcoal tube samples were collected at one end of the condenser. The results of the charcoal tube tests were less than the LOO of 0.39 ppm at 18 inches and 0.39 ppm at 5 feet. These numbers are based on the Limit of Quantitation (LOO) of the test methodology and HCFC-123 may or may not be present in concentrations less than these values, but it is certain that it is not present above 0.39 ppm.

Site Diagram

At this site a refrigerant transfer was performed. Approximately 300 pounds of refrigerant was pumped out of the chiller and then pumped back into the chiller. A separate set of activated charcoal tube samples were collected during this operation from 101 5 AM to 2:15 PM on July 30, 1991. The separate testing done during this operation revealed the concentration of HCFC- 123 did not increase, it remained the same as during normal operatibn. The results of the charcoal tube tests taken during this refrigerant transfer were less than the LOQ of 0.39 ppm at 18 inches and 0.39 ppm at 5 feet. These numbers are based on the Limit of Quantitation (LOQ) of the test methodology and HCFC-I 23 may or may not be present in concentrations less than these values, but it is certain that it is not present above 0.39 ppm.

~ ~ _ _

VENTILATION INLET 4' x 4'

WATER STORAGE

fE CANS

(wp/ ROOF

EXHAUST FAN 0

WWNTO 15' DEEPPIT TUNNEL

o- OPEN CAN UTHiUM BROMIDE

2 "\ 1 1 1 WITHALCOHOL


1 @ 5: 1 63 18" SAME VERT PLANE

(NORMAL OPERATION SAMPLE POINT) A=MPRE=S

I W W N TO TUNNEL L-J - I

/ LOCATIONOFJ - DOOR

CHARCOAL SAMPLES 1 @ 5 : 1 @ 1 8 "

SAME VERT PLANE (SPECIAL REFRIGERANT TRANSFER

SAMPLE POINTI

CEILING HEIGHT 22'

24

Site information

Refrigerant - StartDate Trpe Charge (Lb) # Of Starts

5-91 HCFC-123 2500 12

Run Time (Hours) 1559

Non-Pane Units Refrigerant Type


Ventilation 0 Natural !XI Mechanical

L4 Cl Ventilation meets minimum requirements of ASHRAE Standard 15R. 0 H Tight fitting doors. 0 W Rupture disk piped outside. 0 Ed Purge piped outside. 0 N Drip leg present on purge piping. 0 W HCFC-123 leaks detected with portable G.C. 0 !XI Room air conditioned.

Ed 0 Other sources of refrigerant in the equipment room. Temperature

Empty HCFC-123 Drums

rest Results Activated Charcoal Tubes Method Gas Chromatograph Sample Q 18 inches: LT 0.39 Results are 4 hour time weighted averages (parts per million)

Sample Q 5 feet: LT 0.39

Portable Gas Chromatograph Results (Du Pont)

Point PPM Point PPM 1 ND 9 ND 2 ND 10 ND 3 ND 11 ND 4 ND 12 ND 5 ND 13 6 ND 14 7 ND 15 8 ND 16

Point PPM 17 18 19 20 21 22 23 24

Point PPM 25 26 27 28 29 30 3 i 32

Special Notes: 1. Activated charcoal tubes were calculated using a flow rate of 50 CClmin. 2. All results are reported to two significant figures unless otherwise stated in writing. 3. L.T. = Less than values based on the method limit of quantitation (LOQ). The concentration may or may not be

present at levels below this concentration. N.D. = None detected based on method limit of quantitation (LOQ). The concentration may or may not be


25

Test Report

SiteLOcatkm StP&H!B#Misswri The site was visited on Augu!a 1,1991 andthe8WtsamplesWerecollected from 1210 PM to 410 PM. One Tram HcK;123 chiller was located in this equipment room. The HCFG123 chiller was checked for refrigerant leaks with the portaMe G.C. and one low level leak was found at afield rewo~I~edeductor taponthecondenser.The portable G.C. sample points taken near this leak showed 3.54 ppm, 2.36 ppm and 1.7 ppm. The equipment room had mechanical ventilation but it was not

S i Diagram

running during the sample collection thereforeventilation was only by natural air “ent through the room. The activatsd charcoal tube samples wem collected nearthe leak. The reauks ofthe chafcoal tube tests were legs than the LOQ ofo.39 ppm at 18 inchesend 0.39 ppm at 5feet These numbers am based on the Limit

(L0Q)oftheteSt o f c b M m ” rndwWqy and HCFGl23 may or may not be present in cdncentrations lessthanthesevakles, but it iscertain that it is not present above 0.39 ppm.

. .

EXHAUST FAN MNTlUTlON LOUVERS 2’6‘ x 2’4- s x 5 EXHAUST FAN MNTlUTlON LOUVERS 2’6‘ x 2’4- s x 5

I

?

Site Information Site Location: St. Peters, Missouri

Trane Units

Site Test Date: 8-1-91 Time: 12:lO PM

Chiller #

Type

H Non-Tmne Units Refrigerant


Ventilation 0 Natural El Mechanical

0 Ventilation meets minimum requirements of ASHRAE Standard 15R. 0 64 Tight fitting doors. El 0 Rupture disk piped outside.

0 Purge piped outside. 0 El Drip leg present on purge piping. El 0 HCFC-123 leaks detected with portable G.C. 0 El Room air conditioned.

0 El Other sources of refrigerant in the equipment room. Temperature

rest Resutts Activated Charcoal Tubes Method. Gas Chromatograph Sample @I 18 inches: LT 0.39 Results are 4 hour time weighted averages (parts per million)


sortable Gas Chromatograph Resutts (Du Pont) Point PPM Point PPM Point PPM

1 ND 9 3.54 17 2 ND 10 2.36 18 3 ND 11 1.77 19 4 ND 12 20 5 ND 13 21 6 ND 14 22

23 7 ND 15 8 ND 16 24

-c

Point PPM 25 26 27 20 29 30 3i 32

Special Notes: I. Activated charcoal tubes were calculated using a flow rate of 50 CC/min. ?. All results are reported to two significant figures unless 'otherwise stated in writing. 3. L.T. = Less than values based on the method limit of quantitation (LOQ). The concentration may or may not be



27

Test Report

Site Location: Melbourne, Florida This site was visited two times. At the initial visit, two leak sources were detected, one from the purge vent line, and another from a leaking half empty drum of refrigerant. These conditions were corrected and the site was measured on a second.visit. The initial visit to the site was on July 9,1991 and the area samples were collected from 1:30 PM to 210 PM. This was the second of the test sites to be visited. We required a quick determination of the levels of HCFC- 123 in the equipment room, therefore the activated charcoal tube (400QOOmg) samples were collected at a flow rate of 500 cdmin. A total of 20 liters of air was collected with no HCFGI 23 detected on the breakthrough tube. The samples were tested by a fully accredited industrial

hygiene lab other than the Travelers Loss Prevention and Engineering lab. If any HCFC-123 had been detected on the breakthrough tubes then the sample collection method would have been invalid and the numbers for this test would have been questionable. The data from this site is included in this report in order to maintain a complete reporting of all sites tested and all data collected. One Trane HCFC- 123 chiller was located in the equipment room. There were six empty drums of HCFC-123 and one partial drum of R-22 in the equipment room. The portable G.C was used to determine that one drum of HCFG123 was leaking. The HCFC-123 chiller was checked for refrigerant leaks with the portable G.C. and no leaks were found on the chiller itself, but a leak was found on the field installed purge vent piping where an incompatible piping material was used. The room had mechanical ventilation that met the minimum requirements of ASHRAE

Site Diagram

AIR HANDLING 7 UNIT, DX COIL

R-22 (TEMPORARY) r

Standard 15R but was configured in such a manner that a stagnant air zone was located in one corner. The leaking drum of HFCF-123 was located next to the chiller in this stagnant air zone. The portable G.C. showed that the concentration of HCFGI 23 was greatest in this zone and the activated charcoal tube samples were collected there. The results of the charcoal tube tests from the initial visit were 5.92 ppm at 18 inches and 13.6 ppm at 5 feet. The air movement where the samples were collected was erratic, which could account for the inversed distribution of refrigerant shown by these two points. After the initial site visit and prior to the second site visit the following corrective measures were done: 1. All drums of HCFC-I 23 were

2. The purge vent line was repiped.

_ _ _ ~

-

removed from the equipment room.

Copper tubing which is compatible with HCFG123 was used. And, the purge vent line was properly piped so that condensation of the purge gases does not occur.

1ST VISIT

50'

TRACER

CHEMICALS

LOCATION OF

1 fa 5: 1 fa 18" SAME VERT PLANE

~ A R C O A L SAMPLES

- PARTIAL DRUM R-123

6 - 36" LOUVERED SERVICE DOORS (FIXED LOUVERS)

CEILING HEIGHT: 12'

Site Information S i e Location: Melbourne, Florida

Tmne Units

Sie Test Date: 7-9-91 First Visit Time: 12:30 PM

Chiller # H Non-Trane Units Refrigemnt

A fi "denotes Not Available


Ventilation 0 Natural Mechanical Ventilation meets minimum requirements of ASHRAE Standard 15R. Tight fitting doors. Rupture disk piped outside. Purge piped outside. Drip leg present on purge piping. HCFC-123 leaks detected with portable G.C. Room air conditioned.

3ther sources of refrigerant in the equipment room. Temperature

HFCF-123 Drums, R-22 Drum, Leaking HCFC-123 Drum

Test Resutts Activated Charcoal Tubes Method: Gas Chromatograph Sample @I 18 inches: 5.92 Results are time weighted averages (parts per million) taken for 20 minutes.

Sample @I 5 feet: 13.6

Portable Gas Chromatograph Resutts (Du Pont) Point PPM Point PPM Point PPM Point PPM

1 ND 9 ND 17 25 2 ND 10 9.9 18 26 3 ND 11 12.2 19 27 4 ND 12 20 28 5 - 2.2 13 21 29 6 - 9.4 14 22 30 7 - 4.4 15 23 31 8 2.8 16 24 32

Special Notes: 1. Activated charcoal tubes were calculated using a flow rate of 500 CC/min. 2. All results are reported to two significant figures unless otherwise stated in writing. 3. L.T. = Less than values based on the method limit of quantitation (LOQ). The concentration may or may not be



29

Test Report (continued)

Site Location: Melbourne, Florida The second visit to the site was on September419918ndthearea sampleswere collected from 83 AM to 1 2 3 PM. The HCFG123 chiller was checkedforrefrigersrntbwiththe portable GC. and no leaks were found. Thevent i la t iond iwere the sa(ne asduring the first site visit. The roomhadmechzwuca - Iventilationthat met the minimum requirements of ASHRAE Standard 15R but was configured m such a manner that a stagnant air zone was located in one c0mer.m charcod tube samples werecollected in this comer at the same pointasthemplestaken during the initial visit, The charcoal tube samples were taken aver four hours at' 50 cc/mii and SenttoTraVelers InSUranCeCa LOSSReventiond W~~~~

7he results ofthe charcoal tube tests fromthesecondvisitwere lessthan the LOO of 0.56 ppm at 18 inches and 0.33 ppm at Bfeet Thege numbers am b a s 8 d o n t h e L i m i t o f ~ (LOQ) ofthe test methoddogy and HCFC-123 mayor may not be present inconcentrationslessthanthege values. but it is certain that it is not present above 0.56 ppm.

4

i

30

Site Information Site Location: Melbourne, Florida

Tmne Units

S ie Test Date: 9 4 9 1 Second Visit Time: 8:30 PM

Chiller #

*denotes Not Available

H Non-Tmne Units Refrigerant

Equipment Room Configuration

Ventilation 0 Natural H Mechanical Ventilation meets minimum requirements of ASHRAE Standard 15R. Tight fitting doors. Rupture disk piped outside. Purge piped outside. Drip leg present on purge piping. HCFC-123 leaks detected with portable G.C. Room air conditioned.

Other sources of refrigerant in the equipment room. Temperature E R-22 Drum



Pottable Gas Chromatograph Results (Du Pont)

Point 1 2 3 4 5 6

8

7

PPM Point PPM ND 9 ND ND 10 ND 11 ND 12 ND 13 ND 14 NC 15 ND 16

Point 17 18 19 20 21 22 23 24

PPM Point PPM 25 26 27 28 29 30 31 32

Special Notes: 1. Activated charcoal tubes were calculated using a flow rate of 50 Cumin. 2. All results are reported to two significant figures unless otherwise stated in writing. 3. L.T. = Less than values based on the method limit of quantitation (LOO). The concentration may or may not be



31

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