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-� --� <br />350 , ----- _ --- - --- - - -- - _ -- --- <br />j <br />300 j - <br />i <br />250 I ---__ _ -- --- __ __--- _- - ---- <br />� <br />t 200 i <br />H ■ Cashier area <br />m <br />L ' ■ Pets Hotel lobby <br />� <br />D° 150 ! ■ Loading dock area <br />O ' <br />100 { — -- - --- — - - <br />I <br />50 � — — ' <br />I <br />� <br />O � � � �� � <br />Cary - Day 1 Raleigh - Day 1 Cary - Day 1 Raleigh - Day 2 <br />LocationlDay <br />Figure 5 <br />Table 6. Odor Threshold <br />Ralei h - ] <br />2.75 <br />Instrumental measurements could not be obtained with The Jerome Hydrogen Sulfide Analyzer <br />(Arizona Instruments, mode1631-X), and the Drager AccuroOO Gas Detection Pump with a <br />Drager Tube (Drager Safery AG & Co. KGaA) specific for ammonia. This is because the levels <br />of hydrogen sulfide and ammonia at the two PetSmart/PetHotels were so 1ow that they were <br />below the sensitivity of these two devices. <br />