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Ameron Dualoy° Pipe Monitoring System Temperature Tests Two types of temperature tests were conducted: With and without the presence vapor in the interstitial space. The results of these two types of tests are summarized in Table 2. A more complete description of the results follows. Graphical displays of the test results are included in Figures D2 through D5 in Appendix D. Temperature Test Without Trapped Vapor Entrapped air may be minimized by establishing a vacuum in the interstice prior to brine filling. As the presence of trapped air is expected to adversely affect the level change when temperature changes occur, it is important to remove as much of it as possible, particularly for long lines. As described in the test procedures section of this report, the interstitial space was evacuated to around 27-28 inches of Hg. Brine was then pulled into the interstice until the reservoir was about half full. This process minimizes the amount of air trapped in the various fittings. The interstice may also be filled by gravity from the lowest point with bleed valves installed at all high points. Two sets of temperature data were collected during this evaluation. In both cases the liquid circulated through the primary pipe was water. These tests included the following: 1. One two hour circulation with hot liquid (nominal temperature of 100 deg F) through the primary pipe; 2. One two hour circulation with cold liquid (nominal temperature of 32 deg F) through the primary pipe;. The first test involved circulation of hot water at a nominal temperature of approximately 100 Deg F through the primary pipe for two hours at a rate of 6 gal/min. The interstitial temperature at the beginning of the circulation was 63 deg F and was around 100 deg at the end of the test. The results show a change in level from 7.53 inches to 7.81 inches after two hours. A level increase of 0.28 inches occurred with a temperature change of+37 deg F. This effect is shown in Figure D-2 in Appendix D. The second temperature test involved circulation of cold liquid through the primary pipe for two hours with the brine reservoir level again measured at the beginning and end of the test. The temperature of the water circulated through the primary line was approximately 32 deg F. The interstitial temperature at the beginning of the circulation was approximately room temperature or 71 deg F and decreased to 37 deg F at the end of the circulation. The initial brine reservoir was 7.69 at the beginning of the circulation. The level after two hours of circulation was approximately 7.44 inches. The observed level decrease was 0.25 inches for a temperature decrease of 34 deg F. These are the worst-case data for the temperature effects without trapped vapor. This effect is shown in Figure D-3 in Appendix D. Page 8 of 12