Day 085 - 08 Feb 95 - Page 45


     
     1        the grill will be at the temperature which are put in
     2        parenthesis on appendix 2?
     3        A.  On appendix 2, referring to the gas grills that were in
     4        operation then, at the time that you do the calibration you
     5        would anticipate that those temperatures would be within
     6        that range.  That would tell you that the grill was
     7        functioning correctly, that the air flows were correct.
     8        Throughout the cooking, when you have put meat down on the
     9        grill, that messes up and jumbles up the temperatures on
    10        the grill surface.  It will be above 350, but to understand
    11        that the gas -- the important thing with the gas grill is
    12        that the flow of air through it is right, that everything
    13        is set up correctly.  To understand that correctly, you
    14        have to do a test at a specific time of the day to
    15        establish that.
    16
    17   MS. STEEL:   So that is just a one-off test in the morning
    18        before you get going?
    19        A.  To do it correctly, yes.
    20
    21   Q.   Is that the type of grill that was in operation in Preston
    22        at the time of the food poisoning incidents?
    23        A.  I am sorry to say, I would not have an idea.
    24
    25   Q.   Do you know what the date of this document is?
    26        A.  I do not know the date of the document, but regardless
    27        of the date, clamshell grills have been around, I believe,
    28        before Preston was in -- the incident at Preston, so they
    29        could either have had or not had it, so both of the
    30        technologies were in operation so it is possible either
    31        way.
    32
    33   MR. JUSTICE BELL:  In other words, all appendix 2 is is a check
    34        before you start cooking, made at some time before you
    35        start cooking, that you have got your proper air flows so
    36        that the temperature is related as you would expect if it
    37        is all working properly and reaching the temperatures which
    38        you would expect if it is all working properly?
    39        A.  That is right.  This really is a work sheet for me to
    40        take to the station to record it on.  You would have your
    41        card which tells you what to do -----
    42
    43   Q.   But I am right in what I have said?
    44        A.  You are right in what you say.  But you just tick to
    45        say that the criteria had been met, so you would use this
    46        as your work sheet as you did it.
    47
    48   MR. RAMPTON:  My Lord, paragraph 8 of Mr. Wignall's statement
    49        tells us this copy of the calibration check list was the
    50        one in use in 1990. 
    51 
    52   MS. STEEL:   Do you know how often these calibration check lists 
    53        were carried out?
    54        A.  This was used as a work sheet each day on which you
    55        would -- because you had a calendar on the wall which was
    56        rather cumbersome to move around, you have would a
    57        calibration check list that you would take to the station
    58        which encompassed a lot of the checks that were done.  You
    59        would use this as an aid to record what you were doing, and
    60        then you would then go and check off that you had done it.

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