Document ID: EPA-HQ-OPP-2005-0123-0242
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2006-09-29T04:00Z

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

	WASHINGTON, D.C. 20460

							                                               	OFFICE OF

				PREVENTION, PESTICIDES

	AND TOXIC SUBSTANCES

MEMORANDUM

Date:		September 29, 2006

Subject:	Buffer Zone Look-up Tables for Methyl Bromide’s Commodity
Uses 

From:	Steven Weiss, Chemical Review Manager

Special Review Branch, 

Special Review and Reregistration Division (7508P)

To:		Methyl Bromide Docket (EPA-HQ-OPP-2005-0123)

The August 1, 2006 document, “Report of Food Quality Protection Act
(FQPA) Tolerance Reassessment and Risk Management Decision (TRED) for
Methyl Bromide, and Reregistration Eligibility Decision (RED)”
required several risk mitigation measures.  One of the risk mitigation
measures was the establishment of buffer zones during aeration and
treatment periods.  The decision document describes buffer zones for
distances based on the PERFUM2 modeling results (99th percentile whole
field) that were included the Agency’s March 10, 2006 document,
“Methyl Bromide: Phase 5 Health Effects Division (HED) Human Health
Risk Assessment For Commodity Uses.”  The attached document contains
buffer zone look-up tables based on the Agency’s PERFUM modeling.



  TOC \o "1-3" \h \z \u    HYPERLINK \l "_Toc147213493"  Introduction	 
PAGEREF _Toc147213493 \h  4  

  HYPERLINK \l "_Toc147213504"  1.0	Treatment	  PAGEREF _Toc147213504 \h
 6  

  HYPERLINK \l "_Toc147213505"  Table 1a. Buffer Zones (m) During
Treatment Period of 24 Hours or Greater	  PAGEREF _Toc147213505 \h  6  

  HYPERLINK \l "_Toc147213506"  Table 1b. Buffer Zones (m) During
Treatment Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213506 \h  7  

  HYPERLINK \l "_Toc147213507"  Table 1c. Buffer Zones (m) During
Treatment Period, Up To 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213507 \h  7  

  HYPERLINK \l "_Toc147213508"  2.0	Aeration, No Stack	  PAGEREF
_Toc147213508 \h  8  

  HYPERLINK \l "_Toc147213509"  Table 2a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213509 \h  8  

  HYPERLINK \l "_Toc147213510"  Table 2b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213510 \h  8  

  HYPERLINK \l "_Toc147213511"  Table 2c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213511 \h  9  

  HYPERLINK \l "_Toc147213512"  3.0	Aeration, 10 ft Stack Height, 1 Air
Exchange Every Minute	  PAGEREF _Toc147213512 \h  10  

  HYPERLINK \l "_Toc147213513"  Table 3a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213513 \h  10  

  HYPERLINK \l "_Toc147213514"  Table 3b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213514 \h  10  

  HYPERLINK \l "_Toc147213515"  Table 3c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213515 \h  11  

  HYPERLINK \l "_Toc147213516"  4.0	Aeration, 10 ft Stack Height, 1 Air
Exchange Every 2 Minutes	  PAGEREF _Toc147213516 \h  12  

  HYPERLINK \l "_Toc147213517"  Table 4a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213517 \h  12  

  HYPERLINK \l "_Toc147213518"  Table 4b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213518 \h  12  

  HYPERLINK \l "_Toc147213519"  Table 4c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213519 \h  13  

  HYPERLINK \l "_Toc147213520"  5.0	Aeration, 10 ft Stack Height, 1 Air
Exchange Every 5 Minutes	  PAGEREF _Toc147213520 \h  14  

  HYPERLINK \l "_Toc147213521"  Table 5a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213521 \h  14  

  HYPERLINK \l "_Toc147213522"  Table 5b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213522 \h  14  

  HYPERLINK \l "_Toc147213523"  Table 5c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213523 \h  15  

  HYPERLINK \l "_Toc147213524"  6.0	Aeration, 10 ft Stack Height, 1 Air
Exchange Every 10 Minutes	  PAGEREF _Toc147213524 \h  16  

  HYPERLINK \l "_Toc147213525"  Table 6a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213525 \h  16  

  HYPERLINK \l "_Toc147213526"  Table 6b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213526 \h  16  

  HYPERLINK \l "_Toc147213527"  Table 6c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213527 \h  17  

  HYPERLINK \l "_Toc147213528"  7.0	Aeration, 10 ft Stack Height, 1 Air
Exchange Every 20 Minutes	  PAGEREF _Toc147213528 \h  18  

  HYPERLINK \l "_Toc147213529"  Table 7a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213529 \h  18  

  HYPERLINK \l "_Toc147213530"  Table 7b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213530 \h  18  

  HYPERLINK \l "_Toc147213531"  Table 7c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213531 \h  19  

  HYPERLINK \l "_Toc147213532"  8.0	Aeration, 25 ft Stack Height, 1 Air
Exchange Every Minute	  PAGEREF _Toc147213532 \h  20  

  HYPERLINK \l "_Toc147213533"  Table 8a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213533 \h  20  

  HYPERLINK \l "_Toc147213534"  Table 8b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213534 \h  20  

  HYPERLINK \l "_Toc147213535"  Table 8c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213535 \h  21  

  HYPERLINK \l "_Toc147213536"  9.0	Aeration, 25 ft Stack Height, 1 Air
Exchange Every 2 Minutes	  PAGEREF _Toc147213536 \h  22  

  HYPERLINK \l "_Toc147213537"  Table 9a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213537 \h  22  

  HYPERLINK \l "_Toc147213538"  Table 9b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213538 \h  22  

  HYPERLINK \l "_Toc147213539"  Table 9c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213539 \h  23  

  HYPERLINK \l "_Toc147213540"  10.0	Aeration, 25 ft Stack Height, 1 Air
Exchange Every 5 Minutes	  PAGEREF _Toc147213540 \h  24  

  HYPERLINK \l "_Toc147213541"  Table 10a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213541 \h  24  

  HYPERLINK \l "_Toc147213542"  Table 10b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213542 \h  24  

  HYPERLINK \l "_Toc147213543"  Table 10c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213543 \h  25  

  HYPERLINK \l "_Toc147213544"  11.0	Aeration, 25 ft Stack Height, 1 Air
Exchange Every 10 Minutes	  PAGEREF _Toc147213544 \h  26  

  HYPERLINK \l "_Toc147213545"  Table 11a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213545 \h  26  

  HYPERLINK \l "_Toc147213546"  Table 11b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213546 \h  26  

  HYPERLINK \l "_Toc147213547"  Table 11c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213547 \h  27  

  HYPERLINK \l "_Toc147213548"  12.0	Aeration, 25 ft Stack Height, 1 Air
Exchange Every 20 Minutes	  PAGEREF _Toc147213548 \h  28  

  HYPERLINK \l "_Toc147213549"  Table 12a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213549 \h  28  

  HYPERLINK \l "_Toc147213550"  Table 12b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213550 \h  28  

  HYPERLINK \l "_Toc147213551"  Table 12c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213551 \h  29  

  HYPERLINK \l "_Toc147213552"  13.0	Aeration, 50 ft Stack Height, 1 Air
Exchange Every Minute	  PAGEREF _Toc147213552 \h  30  

  HYPERLINK \l "_Toc147213553"  Table 13a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213553 \h  30  

  HYPERLINK \l "_Toc147213554"  Table 13b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213554 \h  30  

  HYPERLINK \l "_Toc147213555"  Table 13c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213555 \h  31  

  HYPERLINK \l "_Toc147213556"  14.0	Aeration, 50 ft Stack Height, 1 Air
Exchange Every 2 Minutes	  PAGEREF _Toc147213556 \h  32  

  HYPERLINK \l "_Toc147213557"  Table 14a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213557 \h  32  

  HYPERLINK \l "_Toc147213558"  Table 14b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213558 \h  32  

  HYPERLINK \l "_Toc147213559"  Table 14c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213559 \h  33  

  HYPERLINK \l "_Toc147213560"  15.0	Aeration, 50 ft Stack Height, 1 Air
Exchange Every 5 Minutes	  PAGEREF _Toc147213560 \h  34  

  HYPERLINK \l "_Toc147213561"  Table 15a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213561 \h  34  

  HYPERLINK \l "_Toc147213562"  Table 15b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213562 \h  34  

  HYPERLINK \l "_Toc147213563"  Table 15c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213563 \h  35  

  HYPERLINK \l "_Toc147213564"  16.0	Aeration, 50 ft Stack Height, 1 Air
Exchange Every 10 Minutes	  PAGEREF _Toc147213564 \h  36  

  HYPERLINK \l "_Toc147213565"  Table 16a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213565 \h  36  

  HYPERLINK \l "_Toc147213566"  Table 16b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213566 \h  36  

  HYPERLINK \l "_Toc147213567"  Table 16c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213567 \h  37  

  HYPERLINK \l "_Toc147213568"  17.0	Aeration, 50 ft Stack Height, 1 Air
Exchange Every 20 Minutes	  PAGEREF _Toc147213568 \h  38  

  HYPERLINK \l "_Toc147213569"  Table 17a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213569 \h  38  

  HYPERLINK \l "_Toc147213570"  Table 17b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213570 \h  38  

  HYPERLINK \l "_Toc147213571"  Table 17c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213571 \h  39  

  HYPERLINK \l "_Toc147213572"  18.0	Aeration, Portable 50 ft Stack, 1
Air Exchange Every Minute	  PAGEREF _Toc147213572 \h  40  

  HYPERLINK \l "_Toc147213573"  Table 18a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213573 \h  40  

  HYPERLINK \l "_Toc147213574"  Table 18b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213574 \h  40  

  HYPERLINK \l "_Toc147213575"  Table 18c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213575 \h  41  

  HYPERLINK \l "_Toc147213576"  19.0	Aeration, Portable 50 ft Stack
Height, 1 Air Exchange Every 2 Minutes	  PAGEREF _Toc147213576 \h  42  

  HYPERLINK \l "_Toc147213577"  Table 19a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213577 \h  42  

  HYPERLINK \l "_Toc147213578"  Table 19b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213578 \h  42  

  HYPERLINK \l "_Toc147213579"  Table 19c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213579 \h  43  

  HYPERLINK \l "_Toc147213580"  20.0	Aeration, Portable 50 ft Stack
Height, 1 Air Exchange Every 5 Minutes	  PAGEREF _Toc147213580 \h  44  

  HYPERLINK \l "_Toc147213581"  Table 20a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213581 \h  44  

  HYPERLINK \l "_Toc147213582"  Table 20b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213582 \h  44  

  HYPERLINK \l "_Toc147213583"  Table 20c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213583 \h  45  

  HYPERLINK \l "_Toc147213584"  21.0	Aeration, Portable 50 ft Stack
Height, 1 Air Exchange Every 10 Minutes	  PAGEREF _Toc147213584 \h  46  

  HYPERLINK \l "_Toc147213585"  Table 21a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213585 \h  46  

  HYPERLINK \l "_Toc147213586"  Table 21b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213586 \h  46  

  HYPERLINK \l "_Toc147213587"  Table 21c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213587 \h  47  

  HYPERLINK \l "_Toc147213588"  22.0	Aeration, Portable 50 ft Stack
Height, 1 Air Exchange Every 20 Minutes	  PAGEREF _Toc147213588 \h  48  

  HYPERLINK \l "_Toc147213589"  Table 22a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213589 \h  48  

  HYPERLINK \l "_Toc147213590"  Table 22b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213590 \h  48  

  HYPERLINK \l "_Toc147213591"  Table 22c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213591 \h  49  

  HYPERLINK \l "_Toc147213592"  23.0	Aeration, PPQ, 1 Air Exchange Every
Minute	  PAGEREF _Toc147213592 \h  50  

  HYPERLINK \l "_Toc147213593"  Table 23a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213593 \h  50  

  HYPERLINK \l "_Toc147213594"  Table 23b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213594 \h  50  

  HYPERLINK \l "_Toc147213595"  Table 23c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213595 \h  51  

  HYPERLINK \l "_Toc147213596"  24.0	Aeration, PPQ, 1 Air Exchange Every
2 Minutes	  PAGEREF _Toc147213596 \h  52  

  HYPERLINK \l "_Toc147213597"  Table 24a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213597 \h  52  

  HYPERLINK \l "_Toc147213598"  Table 24b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213598 \h  52  

  HYPERLINK \l "_Toc147213599"  Table 24c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213599 \h  53  

  HYPERLINK \l "_Toc147213600"  25.0	Aeration, PPQ, 1 Air Exchange Every
5 Minutes	  PAGEREF _Toc147213600 \h  54  

  HYPERLINK \l "_Toc147213601"  Table 25a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213601 \h  54  

  HYPERLINK \l "_Toc147213602"  Table 25b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213602 \h  54  

  HYPERLINK \l "_Toc147213603"  Table 25c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213603 \h  55  

  HYPERLINK \l "_Toc147213604"  26.0	Aeration, PPQ, 1 Air Exchange Every
10 Minutes	  PAGEREF _Toc147213604 \h  56  

  HYPERLINK \l "_Toc147213605"  Table 26a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213605 \h  56  

  HYPERLINK \l "_Toc147213606"  Table 26b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213606 \h  56  

  HYPERLINK \l "_Toc147213607"  Table 26c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213607 \h  57  

  HYPERLINK \l "_Toc147213608"  27.0	Aeration, PPQ, 1 Air Exchange Every
20 Minutes	  PAGEREF _Toc147213608 \h  58  

  HYPERLINK \l "_Toc147213609"  Table 27a. Buffer Zones (m) During
Aeration Period, Greater than 8 Hours, Greater than 4 lbs/1000 ft3	 
PAGEREF _Toc147213609 \h  58  

  HYPERLINK \l "_Toc147213610"  Table 27b. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Up to 4 lbs/1000 ft3	  PAGEREF
_Toc147213610 \h  58  

  HYPERLINK \l "_Toc147213611"  Table 27c. Buffer Zones (m) During
Aeration Period, Up to 8 Hours, Greater than 4 lbs/1000 ft3	  PAGEREF
_Toc147213611 \h  59  

 Introduction

	This document, a companion document to the EPA’s Report of Food
Quality Protection Act (FQPA) Tolerance Reassessment and Risk Management
Decision (TRED) for Methyl Bromide, and Reregistration Eligibility
Decision (RED) for Methyl Bromide’s Commodity Uses (EPA 738-R-06-026,
currently under a comment period), and Methyl Bromide: Phase 5 Health
Effects Division (HED) Human Health Risk Assessment For Commodity Uses,
was developed as a means to assess the PERFUM2 runs completed in support
of the development of these documents.  The following tables depict
buffer zone distances based on the 99th percentile whole field modeling
results for the treatment and aeration techniques employed for commodity
fumigation using methyl bromide (MeBr) at application rates of 1, 2, 3,
4, 9, and 15 lbs ai per 1,000 cubic foot of building volume.  While
model results presented in the risk assessment focused on 1 and 4 hour
periods for building sizes of 1,000, 10,000, 50,000, and 1,000,000 cubic
foot buildings, the tables in this document present all of the building
sizes assessed, at less than 8 hour and 24 hour or greater time periods.
 Additionally, model runs at stack heights of 0 (minimum), 25 feet, and
50 feet above the building heights were examined. Lastly, in the
original modeling effort, runs were conducted for air exchanges of once
every minute, once every two minutes, and once every twenty minutes.  
Two additional air exchange rates were included in these modeling
results: an air exchange every 5 minutes and an air exchange every 10
minutes.

Notes to the Reader

	In the following tables, values depicted as 0† would result in a
buffer distance of 10 feet, the minimum buffer distance, selected by
EPA.  Such values will be reflected in the final look-up tables provided
by EPA.

	In the following tables, values of 1,440 meters represent the maximum
buffer zone distance estimated by the PERFUM2 model.  

	The EPA has assessed treatment buffer zones for two time periods: less
than 8 hours and 24 hours and greater.  The EPA will examine modeling
for treatment periods between 8 and 24 hours, if public comment
indicates such treatment are needed.  

	The EPA assessed “up to 8 hours” treatment and aeration time
periods (reflected in tables labeled b and c throughout this document)
to safeguard on-site and nearby workers who could potentially be exposed
to MeBr during their workday.  The EPA assessed periods of “24 hours
or greater” and “greater than 8 hours” (reflected in tables
labeled a) to safeguard nearby residents who may be at home during the
treatment or aeration periods.

	This document contains buffer zone estimates for the treatment and
aeration periods.  The buffer zone established for the treatment period
must be maintained from the time MeBr is introduced until the aeration
period begins. An aeration buffer zone must then be established and
maintained until the methyl bromide concentration being exhausted from
the enclosure is less than 5 ppm.  Enclosures (i.e., areas fumigated)
must be aerated for a minimum of 4 hours if mechanically ventilated
using fans, or 12 hours if passively ventilated. At the end of the
aeration process, the concentration within the treated commodity (or
space for structural fumigations) must be no greater than 5 ppm. The
reader should consult the MeBr TRED/RED for exceptions to these minimum
aeration times.

	The reader should note that some of the buffer zones reported in the
following tables, particularly those for larger buildings employing air
exchange rates of one air exchange per minute, may appear anomalous,
with values of 0, when smaller buildings have buffer zones much larger. 
These buffer zones are the result of variations in the building
dimensions (i.e., building height and point of exhaust outlet) that were
assumed during the modeling and these buffer zones have been verified by
EPA.

The reader should note that stack heights presented in the following
tables represent the height of the stack above the height of the
building.

	The following tables have been developed for single emission fumigation
sources, e.g., one building/fumigated area and one stack.  

	The EPA has placed the PERFUM2 files used to generate the following
tables onto a compact disc (CD).  This CD is available to the public
upon request through the OPP Regulatory Public Docket.  The Docket
telephone number is (703)305-5805.

1.0	Treatment

Table 1a. Buffer Zones (m) During Treatment Period of 24 Hours or
Greater

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	25	0†	0†	0†	0†	0†	0†	0†	15	35	55	70

	10	0†	0†	0†	0†	0†	0†	0†	0†	0†	5	10

	5	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	1	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

2	25	0†	0†	0†	0†	0†	0†	20	45	80	110	135

	10	0†	0†	0†	0†	0†	0†	0†	10	25	40	50

	5	0†	0†	0†	0†	0†	0†	0†	0†	0†	5	10

	1	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

3	25	0†	0†	0†	0†	0†	5	30	70	115	155	185

	10	0†	0†	0†	0†	0†	0†	5	25	45	65	85

	5	0†	0†	0†	0†	0†	0†	0†	0†	15	25	35

	1	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

4	25	0†	0†	0†	0†	0†	15	45	90	145	195	230

	10	0†	0†	0†	0†	0†	0†	15	35	65	90	110

	5	0†	0†	0†	0†	0†	0†	0†	10	25	40	50

	1	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

9	25	0†	0†	0†	5	25	45	95	170	260	340	400

	10	0†	0†	0†	0†	0†	10	40	85	135	180	215

	5	0†	0†	0†	0†	0†	0†	15	40	75	100	125

	1	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	5

15	25	0†	0†	5	20	45	75	115	240	365	465	550

	10	0†	0†	0†	0†	15	30	65	130	200	255	305

	5	0†	0†	0†	0†	0†	5	30	70	120	155	185

	1	0†	0†	0†	0†	0†	0†	0†	0†	15	25	35

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.



Table 1b. Buffer Zones (m) During Treatment Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	25	0†	0†	0†	0†	25	50	90	160	245	320	375

	10	0†	0†	0†	0†	0†	0†	45	90	145	190	225

	5	0†	0†	0†	0†	0†	0†	10	45	85	120	145

	1	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

2	25	0†	0†	0†	25	55	90	140	235	365	470	550

	10	0†	0†	0†	0†	15	40	80	140	220	280	335

	5	0†	0†	0†	0†	0†	0†	45	90	145	190	225

	1	0†	0†	0†	0†	0†	0†	0†	0†	10	30	45

3	25	0†	0†	15	35	75	115	175	300	455	585	695

	10	0†	0†	0†	5	30	60	100	175	270	355	415

	5	0†	0†	0†	0†	0†	25	60	120	185	245	285

	1	0†	0†	0†	0†	0†	0†	0†	15	45	70	85

4	25	0†	0†	25	45	90	140	205	350	530	690	815

	10	0†	0†	0†	15	45	75	120	210	320	415	490

	5	0†	0†	0†	0†	15	40	80	140	220	280	335

	1	0†	0†	0†	0†	0†	0†	0†	30	70	95	120

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from treatment were assumed to occur over the first
hour of the exposure period.  For the remaining 3 hours, no release
occurred. An HEC of 1 ppm was used in the development of the buffer
zones.

Table 1c. Buffer Zones (m) During Treatment Period, Up To 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	25	0†	0†	0†	0†	0†	0†	40	85	140	185	220

	10	0†	0†	0†	0†	0†	0†	0†	25	60	90	110

	5	0†	0†	0†	0†	0†	0†	0†	0†	5	25	40

	1	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	25	0†	0†	0†	0†	0†	25	65	120	190	250	295

	10	0†	0†	0†	0†	0†	0†	20	60	105	140	170

	5	0†	0†	0†	0†	0†	0†	0†	15	45	70	90

	1	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period. The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period. An HEC of 1 ppm was used in the development of
the buffer zones.

2.0	Aeration, No Stack

Table 2a. Buffer Zones (m) During Aeration Period, Greater than 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	5	25	45	95	150	235	410	625	805	950

	95	0†	5	25	45	90	145	230	405	610	785	930

	90	0†	5	20	40	85	140	225	390	585	755	900

	75	0†	0†	15	35	75	125	200	350	525	675	800

	50	0†	0†	10	25	50	90	155	270	410	525	620

15	99	0†	15	40	70	135	210	330	565	855	1105	1325

	95	0†	15	40	70	135	205	320	550	835	1075	1295

	90	0†	15	35	65	130	195	310	530	810	1040	1250

	75	0†	10	30	55	110	175	275	475	720	930	1110

	50	0†	0†	20	40	80	135	215	370	560	715	855

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 2b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	25	45	90	140	205	350	530	690	810

	95	0†	0†	25	45	85	135	200	340	520	675	790

	90	0†	0†	20	40	85	130	195	335	505	655	770

	75	0†	0†	15	35	75	115	175	300	455	585	695

	50	0†	0†	0†	25	55	90	140	235	365	470	550

2	99	5	20	45	75	140	205	305	510	780	1010	1200

	95	0†	20	40	70	135	205	295	500	760	985	1170

	90	0†	15	40	70	130	195	290	485	735	955	1135

	75	0†	15	35	60	115	175	260	440	675	860	1020

	50	0†	0†	25	45	90	140	205	350	530	690	815

3	99	15	30	60	95	175	260	385	650	985	1290	1440

	95	15	30	55	95	170	255	375	635	955	1260	1440

	90	10	25	55	90	165	245	365	610	930	1215	1440

	75	5	20	50	80	150	225	330	550	835	1085	1295

	50	0†	15	35	60	115	175	260	440	675	860	1020

4	99	20	35	75	115	205	305	455	765	1170	1440	1440

	95	20	35	70	115	200	295	440	745	1140	1440	1440

	90	20	35	70	110	195	290	425	720	1100	1440	1440

	75	15	30	60	95	175	260	385	655	990	1300	1440

	50	5	20	45	75	140	210	310	515	785	1015	1205

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.

Table 2c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	15	40	75	115	200	305	400	470

	95	0†	0†	0†	15	40	70	115	195	300	390	460

	90	0†	0†	0†	10	35	70	110	190	290	380	445

	75	0†	0†	0†	5	30	60	95	170	265	345	405

	50	0†	0†	0†	0†	15	35	75	135	210	270	325

15	99	0†	0†	10	30	65	105	160	270	410	525	620

	95	0†	0†	10	30	60	100	155	260	400	515	605

	90	0†	0†	5	25	60	100	150	255	390	500	585

	75	0†	0†	0†	20	50	85	135	230	350	455	530

	50	0†	0†	0†	10	35	65	105	180	280	365	425

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

3.0	Aeration, 10 ft Stack Height, 1 Air Exchange Every Minute

Table 3a. Buffer Zones (m) During Aeration Period, Greater than 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	25	60	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	25	55	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	25	55	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	20	45	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	30	45	90	85	75	0†	0†

	95	0†	0†	0†	0†	30	45	85	85	70	0†	0†

	90	0†	0†	0†	0†	30	40	80	80	70	0†	0†

	75	0†	0†	0†	0†	25	35	70	70	60	0†	0†

	50	0†	0†	0†	0†	0†	20	50	0†	0†	0†	0†

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 3b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	0†	0†	45	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	45	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	40	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

2	99	0†	0†	0†	0†	25	30	85	75	70	0†	0†

	95	0†	0†	0†	0†	25	30	80	70	65	0†	0†

	90	0†	0†	0†	0†	25	30	80	70	65	0†	0†

	75	0†	0†	0†	0†	20	20	65	55	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	45	0†	0†	0†	0†

3	99	0†	0†	0†	25	35	50	115	100	90	0†	0†

	95	0†	0†	0†	25	35	45	110	100	90	0†	0†

	90	0†	0†	0†	25	35	45	105	95	85	0†	0†

	75	0†	0†	0†	0†	30	35	95	80	75	0†	0†

	50	0†	0†	0†	0†	20	20	65	55	0†	0†	0†

4	99	0†	0†	0†	35	50	65	140	135	110	60	0†

	95	0†	0†	0†	30	45	60	140	125	105	55	0†

	90	0†	0†	0†	30	45	60	135	120	105	55	0†

	75	0†	0†	0†	25	35	50	115	105	90	0†	0†

	50	0†	0†	0†	0†	25	30	85	75	70	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 3c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

4.0	Aeration, 10 ft Stack Height, 1 Air Exchange Every 2 Minutes

Table 4a. Buffer Zones (m) During Aeration Period, Greater than 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	30	45	75	105	145	175	190

	95	0†	0†	0†	0†	30	45	75	105	145	170	185

	90	0†	0†	0†	0†	30	40	70	100	135	160	180

	75	0†	0†	0†	0†	25	35	60	85	120	140	155

	50	0†	0†	0†	0†	0†	20	45	55	85	100	110

15	99	0†	0†	0†	25	50	65	115	165	220	260	290

	95	0†	0†	0†	25	45	65	110	160	215	250	280

	90	0†	0†	0†	25	45	65	105	150	205	240	265

	75	0†	0†	0†	20	40	55	90	130	175	205	230

	50	0†	0†	0†	0†	25	40	70	90	130	150	170

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 4b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	20	30	65	85	105	105	125

	95	0†	0†	0†	0†	0†	30	65	80	100	100	120

	90	0†	0†	0†	0†	0†	25	60	80	95	95	115

	75	0†	0†	0†	0†	0†	20	55	65	80	80	90

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	60	55

2	99	0†	0†	0†	25	45	65	115	155	185	195	225

	95	0†	0†	0†	25	45	60	115	150	180	190	220

	90	0†	0†	0†	20	40	55	110	145	170	180	210

	75	0†	0†	0†	0†	35	50	95	120	145	160	185

	50	0†	0†	0†	0†	20	30	65	85	105	105	125

3	99	0†	0†	20	35	65	90	160	220	270	265	315

	95	0†	0†	20	35	60	85	155	210	260	250	305

	90	0†	0†	0†	35	60	85	145	205	245	245	290

	75	0†	0†	0†	30	50	70	130	175	210	215	250

	50	0†	0†	0†	0†	35	50	95	120	145	160	185

4	99	0†	10	30	50	80	115	215	280	355	345	395

	95	0†	10	30	45	80	115	210	270	340	330	380

	90	0†	10	25	45	75	110	200	260	325	315	365

	75	0†	0†	20	35	65	90	165	220	270	265	320

	50	0†	0†	0†	25	45	65	115	155	185	180	230

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.

Table 4c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	45	0†	70	70	70

	95	0†	0†	0†	0†	0†	0†	45	0†	65	65	65

	90	0†	0†	0†	0†	0†	0†	40	0†	65	65	60

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	55	50

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

5.0	Aeration, 10 ft Stack Height, 1 Air Exchange Every 5 Minutes

Table 5a. Buffer Zones (m) During Aeration Period, Greater than 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	35	55	85	145	220	305	365

	95	0†	0†	0†	0†	30	50	85	140	215	295	350

	90	0†	0†	0†	0†	30	50	80	135	205	280	330

	75	0†	0†	0†	0†	25	40	70	115	175	230	275

	50	0†	0†	0†	0†	0†	25	50	80	125	165	190

15	99	0†	0†	0†	25	55	80	130	215	355	505	600

	95	0†	0†	0†	25	50	80	125	205	345	485	580

	90	0†	0†	0†	25	50	75	120	200	325	460	550

	75	0†	0†	0†	0†	40	65	105	170	270	385	455

	50	0†	0†	0†	0†	30	45	75	125	195	255	305

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 5b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	25	40	75	130	200	235	275

	95	0†	0†	0†	0†	25	40	75	125	195	225	260

	90	0†	0†	0†	0†	20	35	70	120	185	210	235

	75	0†	0†	0†	0†	0†	30	60	100	155	175	190

	50	0†	0†	0†	0†	0†	0†	40	70	100	115	130

2	99	0†	0†	0†	25	50	80	140	235	435	545	625

	95	0†	0†	0†	25	50	75	135	230	415	525	600

	90	0†	0†	0†	25	45	75	125	215	395	500	570

	75	0†	0†	0†	0†	40	60	110	185	320	415	465

	50	0†	0†	0†	0†	25	40	75	130	200	240	280

3	99	0†	0†	25	40	70	115	205	360	635	810	920

	95	0†	0†	20	40	70	110	200	350	610	780	890

	90	0†	0†	20	35	65	105	185	335	580	740	835

	75	0†	0†	0†	30	60	90	155	270	490	620	705

	50	0†	0†	0†	0†	40	60	110	185	320	415	465

4	99	0†	15	30	50	100	160	270	470	800	1035	1200

	95	0†	10	30	50	95	150	260	455	775	1005	1170

	90	0†	10	30	50	90	145	250	435	745	960	1105

	75	0†	0†	25	40	75	115	210	365	635	815	930

	50	0†	0†	0†	25	50	80	140	240	440	550	635

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 5c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	70	85	95

	95	0†	0†	0†	0†	0†	0†	0†	0†	70	80	90

	90	0†	0†	0†	0†	0†	0†	0†	0†	65	75	85

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	65	70

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	20	50	85	125	140	160

	95	0†	0†	0†	0†	0†	20	50	80	120	135	155

	90	0†	0†	0†	0†	0†	0†	45	75	115	130	145

	75	0†	0†	0†	0†	0†	0†	35	65	90	105	120

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	70	80

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

6.0	Aeration, 10 ft Stack Height, 1 Air Exchange Every 10 Minutes

Table 6a. Buffer Zones (m) During Aeration Period, Greater than 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	35	55	90	150	230	325	405

	95	0†	0†	0†	0†	30	55	85	145	225	310	390

	90	0†	0†	0†	0†	30	50	85	140	215	290	365

	75	0†	0†	0†	0†	25	45	70	120	185	245	305

	50	0†	0†	0†	0†	0†	30	50	85	135	175	205

15	99	0†	0†	0†	25	55	85	135	220	375	530	675

	95	0†	0†	0†	25	50	85	130	215	360	510	645

	90	0†	0†	0†	25	50	80	125	205	340	480	610

	75	0†	0†	0†	20	45	65	110	175	285	405	510

	50	0†	0†	0†	0†	30	50	80	130	200	270	340

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 6b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	25	45	80	135	210	315	415

	95	0†	0†	0†	0†	25	40	80	130	205	295	395

	90	0†	0†	0†	0†	20	40	75	125	195	275	370

	75	0†	0†	0†	0†	0†	30	65	105	170	220	285

	50	0†	0†	0†	0†	0†	0†	45	70	115	150	175

2	99	0†	0†	0†	25	55	85	145	245	460	665	825

	95	0†	0†	0†	25	55	85	140	235	440	640	800

	90	0†	0†	0†	25	50	75	135	225	415	610	765

	75	0†	0†	0†	0†	40	65	115	190	345	515	655

	50	0†	0†	0†	0†	25	45	80	135	215	320	420

3	99	0†	0†	25	40	80	140	220	375	660	920	1145

	95	0†	0†	20	40	75	135	210	360	635	895	1105

	90	0†	0†	20	40	70	125	200	345	605	850	1055

	75	0†	0†	0†	30	60	100	165	285	520	740	920

	50	0†	0†	0†	0†	40	65	115	190	345	515	655

4	99	0†	15	30	55	110	190	285	485	830	1155	1435

	95	0†	10	30	50	105	185	275	465	805	1115	1390

	90	0†	10	30	50	100	175	260	450	770	1070	1325

	75	0†	0†	25	40	80	145	225	380	665	930	1150

	50	0†	0†	0†	30	55	90	145	250	460	670	830

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 6c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	80	105	125

	95	0†	0†	0†	0†	0†	0†	0†	0†	80	100	120

	90	0†	0†	0†	0†	0†	0†	0†	0†	75	95	110

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	75	85

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	50

15	99	0†	0†	0†	0†	0†	20	55	90	140	185	215

	95	0†	0†	0†	0†	0†	20	50	85	135	175	205

	90	0†	0†	0†	0†	0†	0†	50	80	130	170	195

	75	0†	0†	0†	0†	0†	0†	40	65	105	140	165

	50	0†	0†	0†	0†	0†	0†	0†	0†	65	85	100

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

7.0	Aeration, 10 ft Stack Height, 1 Air Exchange Every 20 Minutes

Table 7a. Buffer Zones (m) During Aeration Period, Greater than 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	35	60	90	150	235	335	430

	95	0†	0†	0†	0†	35	55	90	145	225	320	410

	90	0†	0†	0†	0†	30	55	85	140	215	305	390

	75	0†	0†	0†	0†	25	45	75	120	190	255	325

	50	0†	0†	0†	0†	0†	30	50	85	140	180	215

15	99	0†	0†	0†	25	55	90	135	225	380	550	705

	95	0†	0†	0†	25	55	85	135	215	365	530	680

	90	0†	0†	0†	25	50	85	125	205	350	500	650

	75	0†	0†	0†	20	45	70	110	180	290	420	540

	50	0†	0†	0†	0†	30	50	80	130	205	280	360

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 7b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	25	45	85	140	215	335	450

	95	0†	0†	0†	0†	25	45	80	135	210	315	425

	90	0†	0†	0†	0†	20	40	75	130	200	290	400

	75	0†	0†	0†	0†	0†	30	65	110	175	230	315

	50	0†	0†	0†	0†	0†	0†	45	75	120	160	190

2	99	0†	0†	0†	25	55	100	150	250	465	685	865

	95	0†	0†	0†	25	55	95	145	240	450	660	835

	90	0†	0†	0†	25	50	85	140	225	425	630	800

	75	0†	0†	0†	20	45	70	120	195	350	535	685

	50	0†	0†	0†	0†	25	45	85	140	220	335	455

3	99	0†	0†	25	40	80	155	225	380	670	940	1175

	95	0†	0†	25	40	80	150	220	365	650	915	1145

	90	0†	0†	20	40	75	140	205	345	615	875	1090

	75	0†	0†	0†	30	65	115	175	290	525	760	950

	50	0†	0†	0†	20	45	70	120	195	350	535	685

4	99	0†	15	35	55	115	210	290	490	840	1180	1440

	95	0†	10	30	50	110	200	280	475	815	1145	1430

	90	0†	10	30	50	105	190	270	455	780	1100	1370

	75	0†	0†	25	40	85	160	230	385	675	950	1185

	50	0†	0†	0†	30	55	100	150	255	470	690	870

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 7c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	85	120	145

	95	0†	0†	0†	0†	0†	0†	0†	0†	85	115	135

	90	0†	0†	0†	0†	0†	0†	0†	0†	80	105	130

	75	0†	0†	0†	0†	0†	0†	0†	0†	60	85	105

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	55

15	99	0†	0†	0†	0†	0†	25	55	90	145	190	240

	95	0†	0†	0†	0†	0†	20	55	90	140	185	225

	90	0†	0†	0†	0†	0†	20	50	85	135	175	210

	75	0†	0†	0†	0†	0†	0†	40	70	110	150	180

	50	0†	0†	0†	0†	0†	0†	0†	0†	70	95	120

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

8.0	Aeration, 25 ft Stack Height, 1 Air Exchange Every Minute

Table 8a. Buffer Zones (m) During Aeration Period, Greater than 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	40	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	40	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	70	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	65	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	65	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	55	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 8b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

2	99	0†	0†	0†	0†	0†	0†	60	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	55	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	55	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	45	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

3	99	0†	0†	0†	0†	0†	0†	85	70	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	80	65	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	80	65	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	65	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	45	0†	0†	0†	0†

4	99	0†	0†	0†	0†	0†	0†	110	85	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	105	85	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	100	80	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	85	70	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	60	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 8c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

9.0	Aeration, 25 ft Stack Height, 1 Air Exchange Every 2 Minutes

Table 9a. Buffer Zones (m) During Aeration Period, Greater than 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	60	90	130	150	165

	95	0†	0†	0†	0†	0†	0†	60	85	125	145	160

	90	0†	0†	0†	0†	0†	0†	55	80	115	140	150

	75	0†	0†	0†	0†	0†	0†	50	70	100	120	130

	50	0†	0†	0†	0†	0†	0†	0†	0†	65	80	90

15	99	0†	0†	0†	0†	0†	30	95	140	195	230	250

	95	0†	0†	0†	0†	0†	25	90	135	190	220	240

	90	0†	0†	0†	0†	0†	20	90	130	180	210	230

	75	0†	0†	0†	0†	0†	0†	75	110	155	180	195

	50	0†	0†	0†	0†	0†	0†	55	75	110	130	140

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 9b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	0†	0†	50	65	75	95	115

	95	0†	0†	0†	0†	0†	0†	50	65	70	90	110

	90	0†	0†	0†	0†	0†	0†	45	60	70	85	105

	75	0†	0†	0†	0†	0†	0†	40	0†	0†	70	85

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	60

2	99	0†	0†	0†	0†	0†	0†	95	125	140	180	205

	95	0†	0†	0†	0†	0†	0†	90	120	140	175	200

	90	0†	0†	0†	0†	0†	0†	90	115	130	170	190

	75	0†	0†	0†	0†	0†	0†	75	95	110	145	165

	50	0†	0†	0†	0†	0†	0†	50	65	75	95	115

3	99	0†	0†	0†	0†	0†	35	135	185	205	255	300

	95	0†	0†	0†	0†	0†	 30 	135	180	195	245	285

	90	0†	0†	0†	0†	0†	30	125	170	185	235	275

	75	0†	0†	0†	0†	0†	20	105	145	160	205	230

	50	0†	0†	0†	0†	0†	0†	75	95	110	145	165

4	99	0†	0†	0†	0†	35	60	175	240	275	325	380

	95	0†	0†	0†	0†	30	55	170	235	265	315	365

	90	0†	0†	0†	0†	30	50	160	225	250	300	350

	75	0†	0†	0†	0†	0†	35	140	190	210	255	300

	50	0†	0†	0†	0†	0†	0†	95	130	145	185	205

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 9c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	55	75

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	50	70

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	65

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	55

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

10.0	Aeration, 25 ft Stack Height, 1 Air Exchange Every 5 Minutes

Table 10a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	25	70	135	215	275	310

	95	0†	0†	0†	0†	0†	25	70	130	210	265	295

	90	0†	0†	0†	0†	0†	20	65	120	200	250	280

	75	0†	0†	0†	0†	0†	0†	55	105	170	210	235

	50	0†	0†	0†	0†	0†	0†	0†	70	115	145	160

15	99	0†	0†	0†	0†	30	55	110	200	350	455	510

	95	0†	0†	0†	0†	25	55	110	195	335	440	485

	90	0†	0†	0†	0†	25	50	105	185	320	415	465

	75	0†	0†	0†	0†	0†	40	90	160	265	350	390

	50	0†	0†	0†	0†	0†	0†	60	115	185	230	260

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 10b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	0†	20	65	115	165	195	215

	95	0†	0†	0†	0†	0†	20	60	110	155	190	210

	90	0†	0†	0†	0†	0†	0†	55	105	150	180	200

	75	0†	0†	0†	0†	0†	0†	45	85	125	150	170

	50	0†	0†	0†	0†	0†	0†	0†	0†	80	95	110

2	99	0†	0†	0†	0†	25	60	115	220	340	435	470

	95	0†	0†	0†	0†	25	60	115	210	330	415	450

	90	0†	0†	0†	0†	25	55	110	200	310	390	420

	75	0†	0†	0†	0†	0†	40	90	170	245	315	335

	50	0†	0†	0†	0†	0†	20	65	115	165	195	220

3	99	0†	0†	0†	0†	50	95	170	340	515	665	735

	95	0†	0†	0†	0†	45	90	165	325	495	640	705

	90	0†	0†	0†	0†	45	85	155	305	470	600	665

	75	0†	0†	0†	0†	35	70	130	250	395	505	545

	50	0†	0†	0†	0†	0†	40	90	170	245	315	335

4	99	0†	0†	0†	20	70	125	230	445	690	890	985

	95	0†	0†	0†	0†	70	120	220	430	660	850	945

	90	0†	0†	0†	0†	65	115	210	410	630	805	895

	75	0†	0†	0†	0†	50	95	175	345	520	670	745

	50	0†	0†	0†	0†	25	65	120	220	345	445	475

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 10c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	60	70	80

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	65	75

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	60	70

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	55

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	70	105	120	140

	95	0†	0†	0†	0†	0†	0†	0†	70	100	115	135

	90	0†	0†	0†	0†	0†	0†	0†	65	95	110	125

	75	0†	0†	0†	0†	0†	0†	0†	0†	75	90	105

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	55	65

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

11.0	Aeration, 25 ft Stack Height, 1 Air Exchange Every 10 Minutes

Table 11a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	35	75	140	220	300	375

	95	0†	0†	0†	0†	0†	30	75	135	215	290	360

	90	0†	0†	0†	0†	0†	25	70	130	205	275	340

	75	0†	0†	0†	0†	0†	0†	60	110	175	230	285

	50	0†	0†	0†	0†	0†	0†	35	75	125	165	195

15	99	0†	0†	0†	0†	30	65	120	210	355	500	630

	95	0†	0†	0†	0†	30	60	115	200	345	480	600

	90	0†	0†	0†	0†	25	60	110	195	325	455	570

	75	0†	0†	0†	0†	0†	45	95	170	270	380	475

	50	0†	0†	0†	0†	0†	25	65	120	195	255	315

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 11b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	0†	0†	65	125	200	280	375

	95	0†	0†	0†	0†	0†	0†	65	120	190	265	350

	90	0†	0†	0†	0†	0†	0†	60	115	185	245	325

	75	0†	0†	0†	0†	0†	0†	50	95	155	200	250

	50	0†	0†	0†	0†	0†	0†	0†	60	100	130	155

2	99	0†	0†	0†	0†	25	60	130	230	435	630	780

	95	0†	0†	0†	0†	20	55	125	220	415	600	755

	90	0†	0†	0†	0†	0†	50	115	210	390	575	715

	75	0†	0†	0†	0†	0†	35	100	180	315	475	600

	50	0†	0†	0†	0†	0†	0†	65	125	200	285	375

3	99	0†	0†	0†	0†	50	95	190	355	630	880	1085

	95	0†	0†	0†	0†	50	90	185	345	605	845	1050

	90	0†	0†	0†	0†	45	85	175	325	580	815	1005

	75	0†	0†	0†	0†	30	70	145	265	490	700	870

	50	0†	0†	0†	0†	0†	35	100	180	315	475	600

4	99	0†	0†	0†	25	75	130	255	460	800	1110	1375

	95	0†	0†	0†	25	70	125	245	445	775	1070	1330

	90	0†	0†	0†	20	65	115	235	425	735	1025	1275

	75	0†	0†	0†	0†	55	95	195	360	635	885	1095

	50	0†	0†	0†	0†	25	60	130	235	435	635	785

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 11c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	70	85	100

	95	0†	0†	0†	0†	0†	0†	0†	0†	65	85	95

	90	0†	0†	0†	0†	0†	0†	0†	0†	60	75	90

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	60	70

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	40	80	125	165	195

	95	0†	0†	0†	0†	0†	0†	35	75	120	160	190

	90	0†	0†	0†	0†	0†	0†	0†	70	115	150	180

	75	0†	0†	0†	0†	0†	0†	0†	50	90	120	140

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	70	80

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

12.0	Aeration, 25 ft Stack Height, 1 Air Exchange Every 20 Minutes

Table 12a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	80	140	225	320	405

	95	0†	0†	0†	0†	0†	0†	40	140	220	305	390

	90	0†	0†	0†	0†	0†	0†	0†	130	210	290	370

	75	0†	0†	0†	0†	0†	0†	0†	115	180	240	310

	50	0†	0†	0†	0†	0†	0†	0†	75	130	175	205

15	99	0†	0†	0†	0†	30	65	125	215	365	525	675

	95	0†	0†	0†	0†	30	65	120	205	350	505	650

	90	0†	0†	0†	0†	25	60	115	200	335	480	615

	75	0†	0†	0†	0†	0†	50	95	170	280	400	515

	50	0†	0†	0†	0†	0†	20	65	125	200	270	345

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 12b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	0†	0†	70	130	205	310	415

	95	0†	0†	0†	0†	0†	0†	70	125	200	290	395

	90	0†	0†	0†	0†	0†	0†	65	120	190	270	370

	75	0†	0†	0†	0†	0†	0†	55	100	165	215	285

	50	0†	0†	0†	0†	0†	0†	0†	65	110	145	175

2	99	0†	0†	0†	0†	25	65	135	235	450	660	825

	95	0†	0†	0†	0†	25	60	130	230	430	635	800

	90	0†	0†	0†	0†	20	55	125	215	405	605	765

	75	0†	0†	0†	0†	0†	40	105	185	335	505	655

	50	0†	0†	0†	0†	0†	0†	70	130	210	315	420

3	99	0†	0†	0†	0†	55	105	205	365	650	915	1145

	95	0†	0†	0†	0†	55	100	195	350	625	885	1105

	90	0†	0†	0†	0†	50	90	185	335	595	840	1060

	75	0†	0†	0†	0†	35	75	150	270	505	730	915

	50	0†	0†	0†	0†	0†	40	105	185	335	505	655

4	99	0†	0†	0†	25	80	155	265	470	815	1145	1435

	95	0†	0†	0†	25	75	145	255	455	790	1110	1390

	90	0†	0†	0†	20	70	135	245	435	760	1065	1325

	75	0†	0†	0†	0†	55	105	205	365	655	920	1150

	50	0†	0†	0†	0†	30	65	135	240	455	665	835

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 12c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	75	105	125

	95	0†	0†	0†	0†	0†	0†	0†	0†	70	100	120

	90	0†	0†	0†	0†	0†	0†	0†	0†	65	90	110

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	70	85

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	40	80	135	180	220

	95	0†	0†	0†	0†	0†	0†	40	80	130	175	205

	90	0†	0†	0†	0†	0†	0†	0†	75	125	165	195

	75	0†	0†	0†	0†	0†	0†	0†	60	100	135	165

	50	0†	0†	0†	0†	0†	0†	0†	0†	60	80	100

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

13.0	Aeration, 50 ft Stack Height, 1 Air Exchange Every Minute

Table 13a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 13b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

2	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

3	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

4	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 13c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

14.0	Aeration, 50 ft Stack Height, 1 Air Exchange Every 2 Minutes

Table 14a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	70	75	70

	95	0†	0†	0†	0†	0†	0†	0†	0†	65	70	65

	90	0†	0†	0†	0†	0†	0†	0†	0†	65	70	60

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	50	50

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	85	130	135	130

	95	0†	0†	0†	0†	0†	0†	0†	80	120	130	120

	90	0†	0†	0†	0†	0†	0†	0†	75	115	125	115

	75	0†	0†	0†	0†	0†	0†	0†	60	95	100	90

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	60	55

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 14b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

2	99	0†	0†	0†	0†	0†	0†	0†	0†	95	110	110

	95	0†	0†	0†	0†	0†	0†	0†	0†	90	105	105

	90	0†	0†	0†	0†	0†	0†	0†	0†	85	100	95

	75	0†	0†	0†	0†	0†	0†	0†	0†	65	80	80

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

3	99	0†	0†	0†	0†	0†	0†	70	85	150	170	170

	95	0†	0†	0†	0†	0†	0†	65	85	140	165	165

	90	0†	0†	0†	0†	0†	0†	60	80	135	155	155

	75	0†	0†	0†	0†	0†	0†	45	65	110	130	125

	50	0†	0†	0†	0†	0†	0†	0†	0†	65	80	80

4	99	0†	0†	0†	0†	0†	0†	100	135	210	255	270

	95	0†	0†	0†	0†	0†	0†	95	125	200	245	245

	90	0†	0†	0†	0†	0†	0†	90	115	190	225	225

	75	0†	0†	0†	0†	0†	0†	70	90	150	175	175

	50	0†	0†	0†	0†	0†	0†	0†	0†	95	110	110

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 14c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

15.0	Aeration, 50 ft Stack Height, 1 Air Exchange Every 5 Minutes

Table 15a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	90	155	195	225

	95	0†	0†	0†	0†	0†	0†	0†	85	150	190	220

	90	0†	0†	0†	0†	0†	0†	0†	80	140	180	205

	75	0†	0†	0†	0†	0†	0†	0†	65	115	145	175

	50	0†	0†	0†	0†	0†	0†	0†	0†	75	95	115

15	99	0†	0†	0†	0†	0†	0†	55	155	260	325	370

	95	0†	0†	0†	0†	0†	0†	50	150	250	315	355

	90	0†	0†	0†	0†	0†	0†	45	140	235	295	340

	75	0†	0†	0†	0†	0†	0†	0†	115	200	250	285

	50	0†	0†	0†	0†	0†	0†	0†	75	130	165	195

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 15b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	0†	0†	0†	70	110	145	165

	95	0†	0†	0†	0†	0†	0†	0†	65	110	135	160

	90	0†	0†	0†	0†	0†	0†	0†	60	100	130	150

	75	0†	0†	0†	0†	0†	0†	0†	0†	80	105	120

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	60	75

2	99	0†	0†	0†	0†	0†	0†	65	155	240	300	345

	95	0†	0†	0†	0†	0†	0†	60	145	235	290	330

	90	0†	0†	0†	0†	0†	0†	50	140	220	275	310

	75	0†	0†	0†	0†	0†	0†	0†	115	180	225	255

	50	0†	0†	0†	0†	0†	0†	0†	70	115	145	170

3	99	0†	0†	0†	0†	0†	0†	110	230	365	450	515

	95	0†	0†	0†	0†	0†	0†	105	220	350	435	495

	90	0†	0†	0†	0†	0†	0†	95	210	335	415	465

	75	0†	0†	0†	0†	0†	0†	75	175	275	345	390

	50	0†	0†	0†	0†	0†	0†	0†	115	180	225	255

4	99	0†	0†	0†	0†	0†	0†	150	300	475	590	685

	95	0†	0†	0†	0†	0†	0†	145	290	460	570	660

	90	0†	0†	0†	0†	0†	0†	135	275	435	540	625

	75	0†	0†	0†	0†	0†	0†	110	230	370	455	520

	50	0†	0†	0†	0†	0†	0†	65	155	245	305	345

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 15c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	60

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	55

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	55

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	60	80	100

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	75	95

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	70	85

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	55	70

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

16.0	Aeration, 50 ft Stack Height, 1 Air Exchange Every 10 Minutes

Table 16a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	100	175	235	290

	95	0†	0†	0†	0†	0†	0†	0†	95	170	225	275

	90	0†	0†	0†	0†	0†	0†	0†	90	160	215	260

	75	0†	0†	0†	0†	0†	0†	0†	70	135	180	220

	50	0†	0†	0†	0†	0†	0†	0†	0†	85	120	145

15	99	0†	0†	0†	0†	0†	0†	60	165	275	385	475

	95	0†	0†	0†	0†	0†	0†	55	155	265	370	460

	90	0†	0†	0†	0†	0†	0†	50	150	255	350	435

	75	0†	0†	0†	0†	0†	0†	0†	125	215	290	365

	50	0†	0†	0†	0†	0†	0†	0†	80	150	200	245

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 16b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	0†	0†	0†	85	145	190	225

	95	0†	0†	0†	0†	0†	0†	0†	80	140	180	210

	90	0†	0†	0†	0†	0†	0†	0†	75	130	170	200

	75	0†	0†	0†	0†	0†	0†	0†	0†	105	135	160

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	75	90

2	99	0†	0†	0†	0†	0†	0†	70	170	295	440	555

	95	0†	0†	0†	0†	0†	0†	65	165	275	415	530

	90	0†	0†	0†	0†	0†	0†	60	160	260	390	495

	75	0†	0†	0†	0†	0†	0†	40	130	220	305	395

	50	0†	0†	0†	0†	0†	0†	0†	85	150	190	225

3	99	0†	0†	0†	0†	0†	0†	115	245	470	675	835

	95	0†	0†	0†	0†	0†	0†	110	235	450	650	805

	90	0†	0†	0†	0†	0†	0†	105	225	425	615	765

	75	0†	0†	0†	0†	0†	0†	85	195	345	510	640

	50	0†	0†	0†	0†	0†	0†	40	130	220	305	395

4	99	0†	0†	0†	0†	0†	25	155	335	620	870	1080

	95	0†	0†	0†	0†	0†	20	150	325	595	840	1045

	90	0†	0†	0†	0†	0†	0†	140	305	565	800	1000

	75	0†	0†	0†	0†	0†	0†	120	245	475	680	840

	50	0†	0†	0†	0†	0†	0†	70	175	295	445	565

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 16c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	55

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	50

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	80	100	125

	95	0†	0†	0†	0†	0†	0†	0†	0†	75	95	115

	90	0†	0†	0†	0†	0†	0†	0†	0†	70	90	110

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	70	80

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

17.0	Aeration, 50 ft Stack Height, 1 Air Exchange Every 20 Minutes

Table 17a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	100	180	245	315

	95	0†	0†	0†	0†	0†	0†	0†	95	175	235	300

	90	0†	0†	0†	0†	0†	0†	0†	90	165	225	285

	75	0†	0†	0†	0†	0†	0†	0†	75	140	195	235

	50	0†	0†	0†	0†	0†	0†	0†	0†	90	130	165

15	99	0†	0†	0†	0†	0†	0†	65	170	285	410	520

	95	0†	0†	0†	0†	0†	0†	60	160	275	395	495

	90	0†	0†	0†	0†	0†	0†	55	155	260	370	470

	75	0†	0†	0†	0†	0†	0†	0†	130	220	315	395

	50	0†	0†	0†	0†	0†	0†	0†	85	155	210	265

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 17b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	0†	0†	0†	85	155	205	260

	95	0†	0†	0†	0†	0†	0†	0†	80	150	200	250

	90	0†	0†	0†	0†	0†	0†	0†	75	140	190	235

	75	0†	0†	0†	0†	0†	0†	0†	60	115	160	195

	50	0†	0†	0†	0†	0†	0†	0†	0†	65	90	115

2	99	0†	0†	0†	0†	0†	0†	70	175	310	480	625

	95	0†	0†	0†	0†	0†	0†	65	170	295	455	595

	90	0†	0†	0†	0†	0†	0†	60	160	275	430	565

	75	0†	0†	0†	0†	0†	0†	40	135	225	345	455

	50	0†	0†	0†	0†	0†	0†	0†	85	155	210	265

3	99	0†	0†	0†	0†	0†	35	120	255	490	710	900

	95	0†	0†	0†	0†	0†	30	115	240	470	690	870

	90	0†	0†	0†	0†	0†	25	110	230	445	660	825

	75	0†	0†	0†	0†	0†	0†	85	195	360	550	710

	50	0†	0†	0†	0†	0†	0†	40	135	225	345	455

4	99	0†	0†	0†	0†	0†	75	155	350	640	915	1150

	95	0†	0†	0†	0†	0†	75	155	335	615	885	1115

	90	0†	0†	0†	0†	0†	65	145	315	585	840	1065

	75	0†	0†	0†	0†	0†	40	120	255	495	715	910

	50	0†	0†	0†	0†	0†	0†	70	175	315	485	635

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 17c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	55	70

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	65

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	60

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	90	125	155

	95	0†	0†	0†	0†	0†	0†	0†	0†	85	120	150

	90	0†	0†	0†	0†	0†	0†	0†	0†	75	110	140

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	85	105

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	50

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

18.0	Aeration, Portable 50 ft Stack, 1 Air Exchange Every Minute

Table 18a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 18b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

2	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

3	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

4	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 18c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

19.0	Aeration, Portable 50 ft Stack Height, 1 Air Exchange Every 2
Minutes

Table 19a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 19b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

2	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

3	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

4	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 19c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

20.0	Aeration, Portable 50 ft Stack Height, 1 Air Exchange Every 5
Minutes

Table 20a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 20b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

2	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

3	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

4	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	265	360

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	230	340

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	315

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 20c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

21.0	Aeration, Portable 50 ft Stack Height, 1 Air Exchange Every 10
Minutes

Table 21a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	180	240

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	170	235

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	160	220

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	180

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	215	305	375

	95	0†	0†	0†	0†	0†	0†	0†	0†	205	295	360

	90	0†	0†	0†	0†	0†	0†	0†	0†	190	280	345

	75	0†	0†	0†	0†	0†	0†	0†	0†	140	235	300

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	140	205

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 21b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	155

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	150

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	135

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

2	99	0†	0†	0†	0†	0†	0†	0†	0†	150	230	290

	95	0†	0†	0†	0†	0†	0†	0†	0†	140	225	280

	90	0†	0†	0†	0†	0†	0†	0†	0†	125	215	270

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	180	235

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	160

3	99	0†	0†	0†	0†	0†	0†	0†	0†	270	380	470

	95	0†	0†	0†	0†	0†	0†	0†	0†	250	360	450

	90	0†	0†	0†	0†	0†	0†	0†	0†	225	340	420

	75	0†	0†	0†	0†	0†	0†	0†	0†	180	260	340

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	180	235

4	99	0†	0†	0†	0†	0†	0†	0†	160	405	535	640

	95	0†	0†	0†	0†	0†	0†	0†	125	385	510	615

	90	0†	0†	0†	0†	0†	0†	0†	0†	355	480	580

	75	0†	0†	0†	0†	0†	0†	0†	0†	275	385	475

	50	0†	0†	0†	0†	0†	0†	0†	0†	155	235	290

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 21c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

15	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

22.0	Aeration, Portable 50 ft Stack Height, 1 Air Exchange Every 20
Minutes

Table 22a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	185	260	320

	95	0†	0†	0†	0†	0†	0†	0†	0†	180	250	310

	90	0†	0†	0†	0†	0†	0†	0†	0†	170	240	295

	75	0†	0†	0†	0†	0†	0†	0†	0†	140	210	260

	50	0†	0†	0†	0†	0†	0†	0†	0†	65	150	195

15	99	0†	0†	0†	0†	0†	0†	0†	145	285	380	460

	95	0†	0†	0†	0†	0†	0†	0†	135	275	370	450

	90	0†	0†	0†	0†	0†	0†	0†	120	265	355	430

	75	0†	0†	0†	0†	0†	0†	0†	0†	230	310	380

	50	0†	0†	0†	0†	0†	0†	0†	0†	160	230	280

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 22b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	0†	0†	0†	0†	0†	0†	110	205	275

	95	0†	0†	0†	0†	0†	0†	0†	0†	100	195	260

	90	0†	0†	0†	0†	0†	0†	0†	0†	95	185	250

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	145	205

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	90	125

2	99	0†	0†	0†	0†	0†	0†	0†	90	310	410	495

	95	0†	0†	0†	0†	0†	0†	0†	0†	295	400	480

	90	0†	0†	0†	0†	0†	0†	0†	0†	280	380	460

	75	0†	0†	0†	0†	0†	0†	0†	0†	230	325	400

	50	0†	0†	0†	0†	0†	0†	0†	0†	115	210	280

3	99	0†	0†	0†	0†	0†	0†	95	250	445	575	695

	95	0†	0†	0†	0†	0†	0†	85	235	430	555	675

	90	0†	0†	0†	0†	0†	0†	55	220	410	530	645

	75	0†	0†	0†	0†	0†	0†	0†	150	350	460	555

	50	0†	0†	0†	0†	0†	0†	0†	0†	230	325	400

4	99	0†	0†	0†	0†	0†	0†	175	340	555	735	905

	95	0†	0†	0†	0†	0†	0†	165	325	540	705	870

	90	0†	0†	0†	0†	0†	0†	155	310	520	675	830

	75	0†	0†	0†	0†	0†	0†	100	255	445	580	700

	50	0†	0†	0†	0†	0†	0†	0†	100	315	415	500

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 22c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	45	95

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	90

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	85

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	70

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	20

15	99	0†	0†	0†	0†	0†	0†	0†	0†	0†	110	165

	95	0†	0†	0†	0†	0†	0†	0†	0†	0†	105	155

	90	0†	0†	0†	0†	0†	0†	0†	0†	0†	100	145

	75	0†	0†	0†	0†	0†	0†	0†	0†	0†	80	120

	50	0†	0†	0†	0†	0†	0†	0†	0†	0†	0†	80

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

23.0	Aeration, PPQ, 1 Air Exchange Every Minute

Table 23a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	10	20	30	45	70	115	160	195	225

	95	0†	0†	10	20	30	45	70	110	155	190	215

	90	0†	0†	10	15	30	45	65	105	145	180	210

	75	0†	0†	5	15	25	40	60	95	135	165	190

	50	0†	0†	0†	5	15	25	45	70	100	125	145

15	99	0†	10	20	30	45	65	100	155	215	260	305

	95	0†	5	20	30	45	65	95	150	210	255	295

	90	0†	5	15	25	45	60	90	145	205	245	285

	75	0†	5	15	25	40	55	80	130	180	220	255

	50	0†	0†	10	15	30	40	65	100	140	175	200

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 23b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	10	15	20	30	50	80	115	145	170

	95	0†	0†	10	15	20	30	45	75	110	140	165

	90	0†	0†	10	15	20	25	45	75	110	135	160

	75	0†	0†	5	10	15	25	40	65	95	120	140

	50	0†	0†	0†	5	10	15	30	50	75	80	110

2	99	0†	10	20	30	40	55	75	125	175	215	255

	95	0†	10	20	25	40	50	75	120	170	210	245

	90	0†	10	20	25	35	50	70	115	165	205	240

	75	0†	5	15	20	30	40	65	105	150	185	215

	50	0†	0†	10	15	20	30	50	80	115	145	170

3	99	5	15	30	40	55	75	100	160	225	275	325

	95	5	15	25	40	55	75	95	155	220	270	315

	90	5	15	25	35	55	70	95	150	210	260	305

	75	0†	10	20	30	45	60	80	135	190	235	270

	50	0†	5	15	20	30	40	65	105	150	185	215

4	99	10	20	35	50	70	95	130	190	265	330	385

	95	10	20	35	50	70	90	125	185	260	320	375

	90	10	20	30	45	65	90	120	175	250	310	360

	75	5	15	30	40	55	75	100	160	225	275	325

	50	0†	10	20	30	40	55	75	125	175	220	255

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 23c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	0†	5	10	25	40	60	75	90

	95	0†	0†	0†	0†	5	10	20	40	60	75	85

	90	0†	0†	0†	0†	5	10	20	40	55	70	80

	75	0†	0†	0†	0†	0†	10	15	30	50	60	70

	50	0†	0†	0†	0†	0†	0†	10	20	35	45	55

15	99	0†	0†	0†	10	15	20	35	60	85	105	125

	95	0†	0†	0†	10	15	20	35	55	80	105	120

	90	0†	0†	0†	5	15	20	30	55	80	100	115

	75	0†	0†	0†	5	10	15	30	50	70	90	105

	50	0†	0†	0†	0†	5	10	20	35	50	65	80

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

24.0	Aeration, PPQ, 1 Air Exchange Every 2 Minutes

Table 24a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	10	20	35	50	75	120	170	200	235

	95	0†	0†	10	20	35	50	75	115	165	200	225

	90	0†	0†	10	20	35	50	70	115	160	190	220

	75	0†	0†	10	15	30	40	65	100	140	170	195

	50	0†	0†	0†	10	20	30	50	75	110	130	150

15	99	0†	5	20	30	50	75	110	170	230	280	320

	95	0†	5	20	30	50	70	105	165	225	  270	315

	90	0†	5	20	30	50	70	100	160	220	260	300

	75	0†	0†	15	25	40	60	90	140	195	235	270

	50	0†	0†	10	20	30	45	70	110	150	180	210

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 24b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	10	20	30	40	55	85	120	145	170

	95	0†	0†	10	20	30	40	50	80	115	140	165

	90	0†	0†	10	15	25	35	50	80	110	140	160

	75	0†	0†	10	15	20	30	45	70	100	125	140

	50	0†	0†	0†	10	15	20	30	50	75	95	110

2	99	0†	10	25	35	55	70	95	140	180	225	260

	95	0†	10	20	35	50	70	95	135	180	220	250

	90	0†	5	20	30	50	65	90	130	170	210	245

	75	0†	5	20	25	40	55	75	110	155	190	220

	50	0†	0†	10	20	30	40	55	85	120	145	170

3	99	0†	15	35	50	70	100	135	190	245	285	330

	95	0†	15	30	45	70	95	130	185	235	280	325

	90	0†	15	30	45	65	90	125	175	225	270	310

	75	0†	10	25	40	60	80	110	155	200	240	280

	50	0†	5	20	25	40	55	75	110	155	190	220

4	99	5	20	40	60	90	125	170	240	305	345	395

	95	5	20	40	60	85	120	165	235	295	335	385

	90	5	20	40	55	85	115	155	225	285	320	370

	75	0†	15	35	50	75	100	135	195	245	285	335

	50	0†	10	25	35	55	70	95	140	185	225	260

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 24c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	5	10	15	25	40	60	75	90

	95	0†	0†	0†	5	10	15	25	40	60	75	85

	90	0†	0†	0†	5	10	15	20	40	55	70	85

	75	0†	0†	0†	0†	5	10	20	35	50	65	75

	50	0†	0†	0†	0†	0†	5	10	25	35	45	55

15	99	0†	0†	5	10	20	25	35	60	85	110	  125

	95	0†	0†	5	10	20	25	35	60	85	105	125

	90	0†	0†	5	10	15	25	35	55	80	100	120

	75	0†	0†	0†	10	15	20	30	50	70	90	105

	50	0†	0†	0†	0†	10	15	20	35	55	70	80

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

25.0	Aeration, PPQ, 1 Air Exchange Every 5 Minutes

Table 25a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	15	25	40	60	85	135	190	225	260

	95	0†	0†	10	25	40	55	85	135	185	220	250

	90	0†	0†	10	20	40	55	80	130	175	210	245

	75	0†	0†	10	20	35	50	70	115	155	190	215

	50	0†	0†	0†	10	25	35	55	85	120	145	165

15	99	0†	0†	20	35	60	85	125	190	260	315	360

	95	0†	0†	20	35	55	80	120	185	255	310	350

	90	0†	0†	20	35	55	80	115	180	245	295	340

	75	0†	0†	15	30	50	70	100	160	220	265	300

	50	0†	0†	10	20	35	50	80	120	170	200	230

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 25b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	10	25	40	55	80	115	145	165	185

	95	0†	0†	10	25	40	55	75	110	140	160	175

	90	0†	0†	10	20	35	50	70	105	135	150	170

	75	0†	0†	5	20	30	45	60	90	115	130	150

	50	0†	0†	0†	10	20	30	45	65	80	100	115

2	99	0†	5	25	40	65	95	135	195	255	290	325

	95	0†	0†	25	40	65	90	130	190	250	285	315

	90	0†	0†	25	40	65	85	125	185	235	270	300

	75	0†	0†	20	35	55	75	110	160	205	230	260

	50	0†	0†	10	25	40	55	80	115	145	165	185

3	99	0†	15	35	55	90	125	175	265	350	405	455

	95	0†	15	35	55	85	120	170	260	340	395	440

	90	0†	15	35	50	85	115	165	250	325	375	420

	75	0†	10	30	45	75	105	145	215	285	330	360

	50	0†	0†	20	35	55	75	110	160	205	230	260

4	99	0†	25	45	65	110	150	215	330	440	510	570

	95	0†	20	45	65	105	150	210	320	425	495	550

	90	0†	20	40	65	100	145	205	305	405	470	530

	75	0†	15	35	55	90	125	180	265	355	410	460

	50	0†	5	25	40	70	95	135	200	255	295	330

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 25c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	5	15	25	35	50	65	80	95

	95	0†	0†	0†	5	15	20	35	45	65	80	90

	90	0†	0†	0†	5	15	20	30	45	60	75	90

	75	0†	0†	0†	5	10	15	25	40	55	65	75

	50	0†	0†	0†	0†	5	10	20	25	40	50	55

15	99	0†	0†	5	15	25	35	55	75	100	115	135

	95	0†	0†	5	15	25	35	50	75	95	110	130

	90	0†	0†	0†	15	25	35	50	70	90	105	125

	75	0†	0†	0†	10	20	30	40	60	75	95	110

	50	0†	0†	0†	5	15	20	30	40	55	70	85

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

26.0	Aeration, PPQ, 1 Air Exchange Every 10 Minutes

Table 26a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	10	25	45	65	95	150	210	250	285

	95	0†	0†	10	25	45	60	95	145	205	245	280

	90	0†	0†	10	25	40	60	90	140	195	235	270

	75	0†	0†	5	20	35	55	80	125	175	210	240

	50	0†	0†	0†	10	25	40	60	95	135	160	185

15	99	0†	0†	25	35	65	90	135	210	290	355	405

	95	0†	0†	20	35	60	90	130	205	285	345	395

	90	0†	0†	20	35	60	85	125	200	275	335	380

	75	0†	0†	15	30	50	75	110	175	240	290	340

	50	0†	0†	10	20	40	55	85	135	185	225	255

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 26b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	10	25	45	65	95	145	190	220	250

	95	0†	0†	10	25	45	65	90	140	185	215	240

	90	0†	0†	10	25	40	60	90	135	175	205	230

	75	0†	0†	5	20	35	55	75	115	155	175	195

	50	0†	0†	0†	10	25	40	55	85	110	125	140

2	99	0†	0†	30	45	75	105	155	235	320	375	425

	95	0†	0†	25	45	70	105	150	230	310	365	410

	90	0†	0†	25	40	70	100	145	220	295	350	395

	75	0†	0†	20	35	60	90	130	195	260	305	345

	50	0†	0†	10	25	45	65	95	145	190	225	250

3	99	0†	15	40	60	95	140	200	310	425	510	580

	95	0†	15	35	55	95	135	195	300	415	490	560

	90	0†	15	35	55	90	130	185	290	400	470	535

	75	0†	5	30	50	80	115	170	260	350	410	465

	50	0†	0†	20	35	60	90	130	195	260	305	345

4	99	0†	25	45	115	115	165	235	375	525	635	725

	95	0†	25	45	110	110	160	230	365	510	610	705

	90	0†	20	45	110	110	155	225	350	490	585	675

	75	0†	15	40	95	95	140	200	315	430	510	580

	50	0†	0†	30	75	75	105	155	240	325	380	430

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 26c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	5	20	30	45	65	85	95	110

	95	0†	0†	0†	5	20	30	45	65	80	95	105

	90	0†	0†	0†	5	15	25	40	60	80	90	100

	75	0†	0†	0†	0†	15	20	35	50	65	75	85

	50	0†	0†	0†	0†	10	15	25	35	45	55	60

15	99	0†	0†	0†	15	30	45	65	100	130	150	170

	95	0†	0†	0†	15	30	45	65	95	130	145	160

	90	0†	0†	0†	15	30	40	60	90	120	140	155

	75	0†	0†	0†	10	25	35	55	80	105	120	135

	50	0†	0†	0†	5	15	25	40	55	75	85	95

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

27.0	Aeration, PPQ, 1 Air Exchange Every 20 Minutes

Table 27a. Buffer Zones (m) During Aeration Period, Greater than 8
Hours, Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	10	25	45	70	105	165	230	280	325

	95	0†	0†	10	25	45	65	100	160	225	270	315

	90	0†	0†	10	25	45	65	95	155	215	260	300

	75	0†	0†	0†	20	40	55	85	140	190	230	265

	50	0†	0†	0†	10	30	40	65	105	145	175	205

15	99	0†	0†	25	40	65	95	145	230	325	395	455

	95	0†	0†	20	40	65	95	140	225	315	385	440

	90	0†	0†	20	35	60	90	135	215	305	370	425

	75	0†	0†	15	30	55	80	120	190	270	330	380

	50	0†	0†	5	20	40	60	90	145	205	250	285

* Emissions were assumed to occur over a 24-hour period. An HEC of 330
ppb was used in the development of the buffer zones.

Table 27b. Buffer Zones (m) During Aeration Period, Up to 8 Hours, Up to
4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

1	99	0†	0†	10	25	50	70	110	170	230	275	310

	95	0†	0†	10	25	50	70	105	165	225	265	300

	90	0†	0†	5	25	45	65	100	160	215	255	290

	75	0†	0†	0†	20	40	60	90	140	190	225	250

	50	0†	0†	0†	10	30	45	65	105	140	165	185

2	99	0†	0†	30	45	80	115	165	260	365	445	510

	95	0†	0†	25	45	75	110	160	255	355	430	495

	90	0†	0†	25	45	75	105	155	245	345	415	475

	75	0†	0†	20	40	65	95	140	220	305	365	420

	50	0†	0†	10	30	50	70	110	170	230	275	315

3	99	0†	15	40	60	100	145	210	345	490	605	705

	95	0†	15	35	60	100	140	205	335	475	585	685

	90	0†	15	35	55	95	140	200	320	460	560	655

	75	0†	5	30	50	85	120	180	285	400	485	565

	50	0†	0†	20	40	65	95	140	220	305	365	420

4	99	0†	25	45	75	120	175	260	425	610	745	865

	95	0†	25	45	70	120	170	250	415	590	720	835

	90	0†	20	45	70	115	165	240	400	570	695	810

	75	0†	15	40	60	100	145	215	345	495	610	710

	50	0†	0†	30	45	80	115	165	265	370	450	515

* A 4-hour exposure period was modeled for exposure periods up to 8
hours. Emissions from aeration were assumed to occur over the first hour
of the exposure period.  For the remaining 3 hours, no release occurred.
An HEC of 1 ppm was used in the development of the buffer zones.



Table 27c. Buffer Zones (m) During Aeration Period, Up to 8 Hours,
Greater than 4 lbs/1000 ft3

App Rate

(lbs/1,000 ft3)	 

% Release	Volume (1,000 ft3)

1	2	5	10	25	50	100	250	500	750	1,000

9	99	0†	0†	0†	5	20	35	55	80	110	130	145

	95	0†	0†	0†	0†	20	35	50	80	105	125	140

	90	0†	0†	0†	0†	20	30	50	75	105	120	135

	75	0†	0†	0†	0†	15	25	45	65	90	100	115

	50	0†	0†	0†	0†	10	20	30	45	60	70	80

15	99	0†	0†	0†	15	35	50	80	120	165	195	215

	95	0†	0†	0†	15	35	50	75	115	160	185	210

	90	0†	0†	0†	15	30	50	75	115	150	180	200

	75	0†	0†	0†	10	25	40	65	100	135	155	175

	50	0†	0†	0†	0†	20	30	45	70	95	110	125

* A 4-hour exposure period was modeled for exposure periods up to 8
hours.  Emissions were assumed to occur over a 24-hour period.  The
exposure period is less than or equal to an 8 hour segment of that
24-hour treatment period.  An HEC of 1 ppm was used in the development
of the buffer zones.

Table of Contents (continued)

  PAGE  59 

Table of Contents (continued)

Table of Contents

  PAGE  4