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3. Engineering Review of Tanks & Equipment Covered by CalARP Program C:\TRICH\Jobs\4515582 Leprino Tracy\Report\Leprino Tracy CalARP 040221.docx 3-3 from another site. Equipment outside of these two rooms was either manufactured after 1987 or dates were not found. Equipment installed after 1988 is considered adequately supported due to the code requirements of the 1988 Uniform Building Code (UBC) unless visual observation discloses a deficiency such as bolts or braces being removed or a lack of anchorage or anchorage that appears marginal. Sites greater than 15 kilometers from a 1997 UBC near field zone or with short and long period spectral accelerations (Ss and S1) per ASCE 7 not greater than 1.5 and 0.6, respectively, are considered adequate if designed to the 1997 UBC or ASCE 7-10 or later. This site is 24 kilometers from the Greenville fault, the closest 1997 UBC near field fault, and has short and long period spectral accelerations less than the prescribed values. 3.2.1 QLC Engine Room The primary equipment in this room includes two high-stage compressors (HSC-1 & HSC-2) (Figures 3-1 & 3-2), two low-stage compressors (LSC-1 & LSC-2) (Figures 3-3 & 3-4) and a high-stage swing compressor (SC-3) (Figures 3-5 & 3-6). Associated equipment includes an intercooler tank (IC-1) (Figures 3-7 & 3-8), a pump recirculator tank (PRU-1) (Figures 3-7 & 3-9), a high pressure receiver tank (HPR-1) (Figures 3-11 & 3-12) suspended from the roof framing and an evaporative condenser (EC-1) on the roof (Figures 3-13 to 3-15). A leak detector (Figure 3-16) located about four feet above the floor covers all equipment in this room. All of the equipment in this room appears to have been manufactured in 1987, one year before the 1988 UBC was released, and therefore not accepted purely on date of installation. Calculations indicate that floor mounted equipment in this room would be designed for 43% of gravity if anchorage were designed to the current code based on factors associated with pressure vessels without skirts at grade. This applies to the compressors HSC-1, HSC-2, LSC-1, LSC-2 and SC-3. Based on analyses of the compressors, they have adequate anchorage with a maximum demand-to-capacity ratio (DCR) of 0.81. A DCR ratio greater than 1.0 indicates a potential deficiency. The intercooler tank (IC-1) and pump recirculator tank (PRU-1) are welded to a steel frame which is in turn anchored to the floor with ten anchor bolts. Calculations indicate that the skid would be designed for 57% of gravity if anchorage were designed to the current code based on factors associated with pressure vessels with skirts at grade. Results of the analysis of the skid indicate a maximum DCR ratio of 0.83.