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conversion.can cause problems when the release of fumigant removes enough heat from the air to cause the air temperature to drop below its Dew Point temperature The amount 01 moisture a parcel of air can hold is dependent upon its temperaturE:.. The De", Point temperature for a parcel of air is the lemperature at which Illat air is holding as much moisture as it can hold If the temperature of air la11s below its Dew Point temperature, fog can form and moisture can condense from the air onto nearby surfaces if the temperature 01 these surfaces is low enough. The higher the percent relative humidity and the lower the temperature of surfaces in the fumigated space before Ihe introduction of fumigant, the greater the chance fog will form in the air and/or condensation will form on surfaces. Condensation can damage surfaces it forms on if they are sensitive to the presence of moisture. The conversion of the fumigant from liquid to gas normally occurs almost instantaneously when it is released into the fumigated space, however it is possible that, based on the circumstances, some fumigant will remain in its liquid form for a short period of time after it has been released. This can be a problem if this super- cooled liquid fumigant is deposited onto surfaces that can be damaged by its presence, however brief. Care must be taken to reduce the chances that moisture is condensed from the air within the fumigated space during fumigant application or that unconverted liquid fumigant is present within the fumigant space long enough to come to rest on surfaces. One way to accomplish both of these is to maximize the amount of air into whichlhe fumigant is released. The greater the number of 'units' of air used to vaporize each 'unit' of fumigant, the less heat that must be removed from each 'unit" of .tir during the conversion process. This reduces the possibility that the capacity of tfle air into which the fumigant is released to hold water or fumigant will be ellCeeded. Increase the volume of air into which the fumigant is released, and thereby maximize the rate of fumigant vaporization from liquid to gas, by situating the discharge end of the fumigant shooting tube on the positive pressure side of an operating fan (blast side) located within a large open area of the fumigated space. The air movement capacity at the fan should be at least 1,000 cubic feet per minute for each pound of ZYTHOR released per minute. Using a small inside diameter shooting tube (1/8 inch) can also reduce the chances of un-vaporized fumigant coming to rest on surfaces within the fumigated space. To further protect against the effects of un-vaporized fumigant on surfaces, it is recommended that protective sheeting, such as polyethylene plastic, be placed on the ffoors in the vicinity of any fumigant release point. In order to prevent damage, do not apply fumigant directly to any surface. Special care should be taken when the percent relative humidity of the air within the fumigated space is high (the amount of moisture in the air is high compared to the total amount it can hold). If necessary delay the fumigation until conditions are more favorable such as when the relative humidity within the structure to be fumigated is lower. ZYTHOR RELEASE Before introducing the fumigant, verify that all required safety equipment is available and in good working order. Position the ZYTHOR cylinder(s) outside the space to be fumigated. 00 not connect cylinders to introduction equipment until all fumigation warning signs have been posted and the space to be fumigated is clear of persons, non-target animals and is properfy secured. Release the ZYTHOR from outside the fumigated space Wear splash resistant goggles or full face shield for eye protection during inlroduction of fumigant or when working around any lines containing fumigant under pressure. Do not wear gloves or rubber boots. AERATION AND CLEARANCE Aer1ltlon The final step in using ZYTHOR is to remove it from within the fumigated space (aeration) an<! to confirm its absence from the fumigated space after the completion of the aeration process (clearance). Aeration of ZYTHOR from a fumigated space involves actively exhausting and/or allowing the ZYTHOR to dissipate from the fumigated'. space out into the atmosphere. Clearance involves sampling the air willlin the fumigated space with an approved and property calibrated Low Fumigant Level Detection Device untit readings given by the detection device indicate that fumigant is ria longer present above 1 ppm within the breathing zones of any room of the fumigated space. Only when certain periods of lime (see Aeration Procedures below) have elapsed after the initiation 01 the aeration process and the Ievet of fumigant remaining is confirmed at the end of tl10se time periods to no longer exceed 1 ppm can final clearance for re-occupancy be given. Respiratory Protection Requirements During Aeration and Clearance The processes of aeration and clearance of the fumigated space require entry into the fumigated space while the level of ZYTHOR in the air within the fumigated space still exceeds 1 ppm All persons entering and/or remaining inside the fumigated space between the time of initial application 01 ZYTHOR to the fumigated space and final clearance of the fumigated space must adhere to the requirements of the Respiratory Protection, Respiratory Protection Devices and Low Fumigant Levet Detection Devices sections 01 this label. Aeration Procedures There are two approved procedures for aeration The aeration procedure used lor a lumlgated space is based on tile total amount of ZYTHOR per tllousand cubic feet that was released within the fumigated space during the exposure period. All structures into which a total 01 more tllan 16 ounces 01 ZYTHOR per thousand cubic leet ollumlgated space has been released during the Exposure Period must be aerated using Aeration Procedure 2. All other lumig3ted spaces can be aerated using either Aeration Procedure 1 or Aeration Procedure 2 Aeration Procedure 1 - Applied Dose 16 oz/1000 cubic feet or less These steps must be completed in sequence. Step (1): Aerate the fumigated space with all operable windows and doors open, aided by the use of 1 or more fans, for a minimum of 1 hour. All of the fans used shall, in total, be capable of displacing at least 5,000 cubic feet of air per minute. The fans may be turned off for the remainder of the aeration period if desired. Step (2): Secure fumigated space and do not allow reentry for a minimum of 6 110urs from the start of the aeration process (first opening of the seal). During this time, the fumigated space must remain posted. Step (3): After the minimum 6 hour waiting period, measure the concentration of ZYTHOR in the breathing zones of each room of the fumigated space using an approved and properly calibrated Low Fumigant Level Detection Device. If a concentration 01 ZYTHOR greater than 1 ppm is detected, ventilate the fumigated space by opening operable doors and windows for at least 10 minutes. Fumigated space may be cleared for re-occupancy when the concentration of ZYTHOR as measured with an approved and properfy calibrated Low Fumigant Level Detection Device is determined to be 1 ppm or less. Aeration Procedure 2 - Applied Dose More Than 16 oz/1000 cubic feet These steps must be completed in sequence, Step (1): Aerate the fumigated space with all operabfe windows and doors open, aided by the use of 1 or more fans, for a minimum of 1 hour. All of the fans used shall, in total, be capable of displacing at least 5,000 cubic feet of air per minute. The fans may be turned off for the remainder of the aeration period if desired. Step (2): Secure the fumigated space and do not allow reentry for a minimum of 8 hours Irom the start of the aeration process (first opening of the seal). During this time, the fumigated space must remain posted. Step (3): After the minimum 8 hour waiting period, measure the concentration of ZYTHOR in the breathing zones of each room of the fumigated space using an approved and properly calibrated Low Fumigant Level Detection Device. If a concentration of ZYTHOR greater than 1 ppm is detected, ventilate the fumigated space by opening operable doors and window for at least 10 minutes. Fumigated space may be cleared for re-occupancy when the concentration of ZYTHOR as measured with an approved and properly calibrated Low Fumigant Level Detection Device is determined to be 1 ppm or less. Final Clearance and Re-occupancy Do not reoccupy fumigated space, i.e., structure, ship, vehicle or chamber, or move fumigated vehicles until aeration is complete and clearance has been given. Warning signs must remain posted until aeration is completed and final clearance for re-occupancy is given. TERMS AND CONDITIONS OF USE II terms of the following Warranty Disclaimer, Inherent Risks of Use or Limitation of Remedies are not acceptable, return unopened package at once to the seller for a full refund of the purchase price paid. Otherwise, use by the buyer or any other user constitutes acceptance of the terms under Warranty Disclaimer, Inherent Risks of Use and Limitation of Remedies. WARRANTY DISCLAIMER ENSYSTEX II warrants that this product conforms to the chemical description on the label and that it is reasonably fit for the purposes stated on the label when used in strict accordance with the directions for use, subject to the inherent risks set forth below. ENSYSTEX II MAKES NO OTHER EXPRESS OR IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY OTHER EXPRESS OR IMPLIED WARRANTY. INHERENT RISKS OF USE lt is impossible to eliminate all risks associated with use of this product. Lack of performance or other unintended consequences may result because 01 lactors such as use of the product contrary to the label directions or contrary to the dosage and/or exposure period recommendations 01 the Fumicalc, adverse conditions (such as unfavorable temperatures, high humidity, unfavorable soil conditions, excessive rainfall, etc.), abnormal conditions (such as excessive winds, tornadoes, hurricanes), presence of other materials, the manner of application or other factors, all of which are beyond the control of ENSYSTEX II or the seller. All such risks shall be assumed by the Buyer and User. LIMITATION OF REMEDIES The exclusive remedy lor losses or damages resulting Irom the use of this product (including claims based on contract, negligence, strict liability or other legal theories), shall be limited to, at ENSYSTEX II's election, one of the following: Refund 01 purchase price paid by the buyer or user for product bought or replacement of amount of product used. ENSYSTEX II shall not be liable for losses or damages resulting from handling or use of this product unless ENSYSTEX II is promptly notified of such loss or damage in writing In no case shall ENSYSTEX II be liable for consequential or incidental damages or losses even if ENSYSTEX II knew 01, was advised of, or sllould have been aware 01 the possibility of such damages. The terms of the Terms and Conditions of Use, Warranty Disclaimer, Inherent Risks 01 Use and this Limitation 01 Remedies cannot be varied by any written or verbal statements or agreements. No employee or sales agent of ENSYSTEX II or the seller is authorized to vary or exceed the terms of the Warranty Disclaimer or this Limitation of Remedies in any manner. 5