Buffer Zones and Credits
John Leahy, EPAPesticide Re-evaluation Division
Buffer Zones– Area around the application block or greenhouse
• Bystanders must be excluded during buffer zone period except when in transit
– “Buffer zone period” starts when fumigant is firstdelivered to soil and is in effect for 48 hours afterapplication ends
– Product labels will display distances in look-up tables based on rate, method and field size
– Credits for certain site conditions or applicationpractices that reduce emissions
2
Buffer Zone Updates 2011
• Will Consider New Flux Studies Including:– Temperature studies– Application method studies– Multi-chemical studies
• Currently received over 20 new studies, more expected
• EPA tarp testing– May result in
performance based standards
3
4
Transit Through Buffer Zones
• Vehicular and bicycle traffic on public and private roadways through the buffer zone is permitted.
• Bus stops or other locations where persons wait for public transit are not permitted within the buffer zone.
• Pedestrians are not permitted within the buffer zone.
4
5
Roads and Rights-of-Ways
Buffers may NOT include roads and rights-of-way UNLESS,– The area is not occupied during the buffer zone period– Entry by non-handlers is prohibited– Applicators comply with all local laws and regulations
5
6
Other Publicly Owned and/or Operated Areas Buffers may NOT include areas such as parks, sidewalks,
permanent walking paths, playgrounds, and athletic fields UNLESS,– The area is not be occupied during buffer zone period– Entry by non-handlers is prohibited– Applicators comply with all local laws and regulations AND– Written permission to include the public area in the buffer
zone is granted by the state/local authorities responsible for management and operation of the area
6
7
Buffer Zone Distances • Product labels will display distances in look-
up tables based on- application rate- field size- application equipment and methods
• Buffer zone credits may be applied for certain site conditions or application practices that reduce emissions (e.g., certain tarps)
7
1 2 3 4 5 6 7 8 9 10 15 20 25 30 35 40 50 60 70 80120 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30125 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 35 40130 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 40 50135 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 45 60140 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 45 60145 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 45 60150 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 45 60155 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 38 45 53 60160 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 38 45 53 60165 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 40 60 60 60170 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 40 50 60 60 60175 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 40 50 60 60 60180 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 40 60 60 60 60185 30 30 30 30 30 30 30 30 30 30 30 32 34 36 38 40 60 60 62 64190 30 30 30 30 30 30 30 30 30 30 30 32 34 36 38 40 60 60 64 68195 30 30 30 30 30 30 30 30 30 30 30 32 34 36 38 40 60 60 66 73200 30 30 30 30 30 30 30 30 30 30 30 32 34 36 38 40 60 60 68 77205 30 30 30 30 30 30 30 30 30 30 30 32 34 36 38 40 60 60 70 81210 30 30 30 30 30 30 30 30 30 30 30 32 34 36 38 40 60 60 73 85215 30 30 30 30 30 30 30 30 30 30 30 33 37 40 43 47 68 77 90 103220 30 30 30 30 30 30 30 30 30 30 30 35 39 44 49 53 77 93 108 122225 30 30 30 30 30 30 30 30 30 30 30 40 50 60 60 60 85 110 125 140230 30 30 30 30 30 30 30 30 30 30 39 48 56 65 67 68 103 120 134 148235 30 30 30 30 30 30 30 30 30 30 40 50 60 70 73 77 122 130 143 157240 30 30 30 30 30 30 30 30 30 30 45 60 68 75 80 85 140 140 153 165245 30 30 30 30 30 30 30 30 30 30 46 63 70 78 86 94 143 150 165 179250 30 30 30 30 30 30 30 30 30 30 48 65 73 82 93 103 147 160 177 193255 30 30 30 30 30 30 30 30 30 30 49 68 76 85 99 113 150 170 189 208260 30 30 30 30 30 30 30 30 30 30 50 70 79 88 105 122 153 180 201 222265 30 30 30 30 30 30 30 30 30 30 51 73 82 92 111 131 157 190 213 236270 30 30 30 30 30 30 30 30 30 30 53 75 85 95 118 140 160 200 225 250275 30 30 30 30 30 32 33 35 36 38 61 84 95 108 131 153 176 215 241 267280 30 30 30 30 30 33 36 39 42 45 69 93 105 122 145 167 192 230 257 283285 30 30 30 30 30 35 39 44 48 53 78 103 115 135 159 180 208 245 273 300290 30 30 30 30 30 36 42 48 54 60 86 112 125 148 173 193 223 260 288 317295 30 30 30 30 30 38 45 53 60 68 94 121 135 162 186 207 239 275 304 333300 30 30 30 30 30 39 48 57 66 75 110 130 145 175 200 220 255 290 320 350
Bro
ad
cast
Eq
uiv
ale
nt
Ap
pli
cati
on
Rate
(lb
s a
i/acre
) Application Block Size (Acres)
Chloropicrin Drip Tarped Buffer Zone Distances
8
9
Buffer Zone Credits% Reduction Condition
MeBr Chloropicrin Metam Dazomet Use of high barrier tarp 30 or 60 30 or 60 15 or 30 NA
> 1% -2% 10 10 10 10
> 2% -3% 20 20 20 20 Organic matter content
> 3% 30 30 30 30
Clay content > 27% 10 10 10 10
≤ 50 F (center pivot and shank)
NA 10 20 NA
> 50-70 F (center pivot and shank)
NA NA 10 NA
Soil Temp
> 50-70 F (drip irrigation, flood irrigation, and
rotary tiller and spray blade
applications)
NA NA 10 NA
Symmetry application system, high barrier tarp, <100 lb ai/A
NA 40 or 70 NA NA
Potasium thiosulfate seal with water applied over tarp
15 15 NA NA
Water seal applied over tarp NA 10 NA NA
Max reduction 80 80 80 40 9
10
Buffer Zone Calculator
• Being developed by EPA to assist users determine buffer zone distances required by label
• Optional to use • Internet accessible• Ability to save, retrieve, edit, and print records• No information will be collected by EPA• Potential to integrate into EPA’s FMP web-based
FMP program
10
11
Buffer Zone Calculator (sample screens)
11
12
Buffer Zone Calculator (sample screens)
12
13
Buffer Zone Calculator (sample screen)
PrintBack
Results:Date and time of calculation: 3/23/2010 11:53 AMProduct Name: Pic-Brom Preplant Soil FumigantEPA Reg No: 8536-9Active ingredients in the product that will be applied: MeBr (50%) and Chloropicrin (50%)Application Method: Tarped beddedApplication rate: 240 lbs product/acreApplication Block Size: 20 acresBuffer Zone Credits Applied: Pliant Blockade Tarp (60% reduction)Total % of reduction with credits: 60% reductionMinimum buffer zone distance without credits: 323 feetMinimum buffer zone distance with credits: 130 feet
Save Save as..
13
14
Buffer Zones
Questions and discussion
14
Buffer Zones
• Extra Slides– Background and additional details
15
16
Recently Submitted Flux Studies• Metam sodium shank and center pivot in WA
(WSU)
• Telone and chloropicrin shank in PNW (Dow)
• Chloropicrin, 1,3-D, and metam potassium shank in FL (USDA Area-Wide)
• Chloropicrin, metam sodium and DMDS shank in GA (USDA Area-Wide)
• Flux Evaluation of a Metam Potassium Application Applied by the Drench Method (AMVAC)
16
17
Recently Submitted Flux Studies (cont)
• Metam sodium shank in MI (MI Growers)
• Metam sodium and chloropicrin shank in WI (WI Growers)
• Metam Sodium for Shank Injection/ Compaction on a Daytime and Nighttime Basis (Metam Alliance)
• Chloropicrin Bedded Shank in FL (CMTF)
17
18
Recently Submitted Flux Studies (cont)
• Methyl bromide and chloropicrin in San Joaquin Valley, CA (MBIP) – Broadcast shallow tarped under standard
HDPE– Broadcast shallow tarped under VIF– Broadcast shallow tarped under VIF with
potassium thiosulfate soil spray– Broadcast shallow tarped under VIF with other
emissions reduction treatment– Deep, tarped strip under VIF
18
19
Expected Flux Studies
• Methyl Bromide in Plant City, FL (MBIP) – Bedded tarp shank injection with VIF– Bedded tarp shank injection with VIF
traditional emissions reduction treatment– Bedded tarp shank injection with metalized
film– Broadcast shallow tarp under VIF
• 1,3-D and chloropicrin broadcast shank in a Florida sod production farm (USDA Area-wide)
19
20
EPA Tarp Permeability Testing
• EPA is testing several tarps determine mass transfer coefficient (MTC) for 1,3-D,MeBr, MeI, MITC, chloropicrin, DMDS, sulfuryl fluoride, and PPO
• MTC data may result in additional/revised buffer zone credits for 2011 labels
• Potential basis for development performance based credits (in lieu credits for specific tarp names) with a standard tarp testing protocol
20
21
Tarps Received by EPA• AEP, Sun Film High Barrier• AEP-One• Berry Plastic, EVOH-High Barrier• Berry Plastic, EVOH-High
Barrier/improved toughness• Berry Plastic, EVOH-Supreme
Barrier• Cadillac VIF - 1.25 mil• Cadillac, HDPE • Canslit Metallic - 1.25 mil, Black• Canslit Metallic - 1.25 mil, White• Canslit, Embossed HDPE, 0.6 ml• Canslit, Embossed LDPE, 1.25 ml• Dow SARANEX A• Dow SARANEX B• FilmTec VIF - 1.25 mil
• Ginegar, Ozgard - 1.25 mil• Ginegar VIF - 1.25 mil• Guardian Olefinas VIF - Black 1.2
mil, Embossed• Mid South VIF - 1.25 mil • Pliant, Embossed Polyethylene
Film• Pliant, Blockade Black - 1.25 mil• Pliant, Blockade White on Black -
1.25 mil• Pliant, Metalized - 1.0 - 1.25 mil• Raven TIF “VaporSafeTM” 1 mil
with EVOH core• Raven TIF “VaporSafeTM” 1.4 mil
LDPE with EVOH core
21
22
Expected Tarps
• Bromostop VIF - 1.30 mil
• Bruno Rimini IPM Clear VIF 1.38
• Klerk Hytibar VIF - 1.30 mil
22
23
Buffers and Agricultural Areas
Buffer zones may include agricultural areas owned/operated by someone other than the owner/operator of the application block IF– The buffer zone will not overlap with a buffer zone
from a nearby fumigation, and – The owner/operator provides written agreement
that they, their employees, and others will stay out of the buffer zone.
23
24
Buffers and Residential Areas
• Buffer zones may include residential areas IF– The occupants provide written agreement to voluntarily vacate the buffer zone during the entire buffer zone period
• For applications of methyl bromide products with less than 20 percent chloropicrin, air monitoring inside residential structures is required after the buffer zone period ends
24
Top Related