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i <br /> service stations and includes HLTs that power elevators in buildings <br /> This distinction is important in interpreting the results of our survey <br /> As is the case with all regulatory programs, there was a time gap <br /> between the date that statewide regulation of HLTs took effect and <br /> the date of actual implementation by LIAs. Some LIAs began to <br /> regulate HLTs soon after the regulations changed; others took at least <br /> a year to begin regulating them. Differences in regulatory a <br /> 9 Y 9 enc <br /> Y <br /> responsiveness to this change account for some of the variation in <br /> survey responses. <br /> Some of the LIAs counted only HLTs that power elevators, whereas <br /> other LIAs counted HLTs at automotive service stations Some LIAs <br /> included all types of HLTs In their survey responses. It was not <br /> necessary to choose a definition when we sent out the survey, <br /> because LiAs can be more stringent than the minimum state <br /> requirements. It is possible that some of the LIAs were regulating all <br /> HLTs, even though the State regulations exempted those with a <br /> capacity of less than 110 gallons. Our lack of definition led some <br /> LIAs to estimate the HLT population and number of leaks, not fust <br /> report those HLTs that they are actively regulating. <br /> Of the 104 LIAs which received the survey (Appendix 1), 57 (56 and <br /> the Santa Clara Valley District) responded. In those cases where two <br /> different staffs from the same LIA provided information, the LIA <br /> consolidated the comments into one response LIAs and Local <br /> Oversight Program agencies (LOPS) reported a total of 26,000 HLTs. <br /> The 57 responding agencies reported 78 confirmed leaks from HLTs. <br /> Of the 78 confirmed leaks, 27 are known to have reached ground <br /> water Of these confirmed leaks which reached ground water, five <br /> threatened a water supply The five leaks that may have posed a <br /> threat to drinking water were reported to have been easily cleaned up <br /> before a current water use was adversely affected. <br /> B. DEPARTMENT OF INDUSTRIAL RELATIONS AND <br /> HYDRAULIC LIFT TANK INDUSTRY SURVEY RESULTS <br /> The Department of Industrial Relations reported that there are 48,000 <br /> hydraulic elevators currently in operation throughout California. Ten <br /> elevator companies responded to the survey No abandoned or no- <br /> longer-in-use elevators were identified by the elevator companies Six <br />