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CLASS - I <br />CLASS II <br />CLASS III — <br />SYSTEM STATISTICS BY CLASS <br />. INDIVIDUAL CONVENTIONAL SYSTEMS <br />- APPROXIMATELY 14,000 IN ORANGE COUNTY <br />- 1 1 % LESS THAN 5 YEARS OLD (1 540 ) <br />13% 5 -10 YEARS OLD ( -1820 ) <br />- <br />767o OLDER THAN 10 YEARS ( 10,640) <br />- 1 1 % FAILING - BASED ON OCHD FILE INFORMATION AND <br />1981 SEPTAGE STUDY (1 540 ) <br />INDIVIDUAL PUMP SYSTEMS <br />- APPROX I MATELY 1, 5 5 0 I N COUNTY (5 5 0 LPP SYSTEMS, <br />1,000 PUMP CONVENTIONAL) <br />APPROXIMATELY 60'Po LESS THAN 5 YEARS OLD ( 930 ) <br />- APPROXIMATELY 357 5-10 YEARS OLD ( 542) <br />- <br />APPROXIMATELY 5% OLDER THAN 10 YEARS (7 8 ) <br />- 24% OF LPP SYSTEMS FAILING (132) - 757o IN SOME <br />SORT OF MECHANICAL NON- COMPLIANCE ( 413) - BASED <br />ON OCHD FILE INFORMATION <br />- NO FAILURE ESTIMATES ARE AVAILABLE FOR PUMP <br />CONVENTIONAL DUE TO LACK OF RE- INSPECTIONS <br />INDIVIDUAL SPRAY IRRIGATION AND <br />DISCHARGING SYSTEMS <br />- a7- IN ORANGE COUNTY (1 5 SPRAY SYSTEMS AND 22 <br />SUBSURFACE SAND FILTERS) <br />- ALL 15 SPRAY SYSTEMS ARE LESS THAN 10 YEARS OLD <br />- MOST SAND FILTERS ARE OLDER THAN 10 YEARS <br />- PERCENT FAILING IS NOT KNOWN BECAUSE OF LACK OF <br />INSPECTIONS. SYSTEMS ARE REPERMITTED AT 5 YEAR <br />INTERVALS AND ARE GENERALLY INSPECTED ONLY WHEN <br />COMPLAINTS ARE RECEIVED CONCERNING THEIR <br />OPERATION <br />