Document ID: EPA-HQ-OPP-2007-0834-0006
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2007-09-28T04:00Z

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

WASHINGTON, D.C. 20460

 OFFICE OF

                                                                        
                                    PREVENTION, PESTICIDES AND 

         TOXIC SUBSTANCES

September 30, 2007

MEMORANDUM

SUBJECT:	Revised Environmental Fate Science Chapter for the Busan 77
Reregistration Eligibility Decision (RED) Document

			DP Barcode:	XXXXXX	Reregistration Case No.:  3034

FROM:	James Breithaupt, Agronomist 

Risk Assessment and Science Support Branch (RASSB)

Antimicrobials Division (7510P)

TO:			Mark Hartman, Branch Chief

Diane Isbell, Team Leader

ShaRon Carlisle, Chemical Review Manager

Regulatory Management Branch II

Antimicrobials Division (7510P)

Genevieve Angle, Risk Assessor

Risk Assessment and Science Support Branch (RASSB)

Antimicrobials Division (7510P)

THRU:	Rick Petrie, Team Leader, Team 3

Risk Assessment and Science Support Branch (RASSB)

Antimicrobials Division (7510P)

Norman Cook, Branch Chief

Risk Assessment and Science Support Branch (RASSB)

Antimicrobials Division (7510P)

Chemical Name	 

		     
Poly[oxyethylene(dimethyliminio)ethylene(eimethyl-iminio)ethylene
dichloride]

		PC Code  		069183

		CAS No. 		31512-74-0

		Common Names:  	None

Attached is the Environmental Fate Science Chapter for the Busan 77 RED
Document.

Attachment:  Environmental Fate Science Chapter for the Busan 77 RED
Document.

Busan 77

REREGISTRATION ELIGIBILITY DECISION

ENVIRONMENTAL FATE SCIENCE CHAPTER

EXECUTIVE SUMMARY

 at 25˚C.  The chemical structure of Busan 77 (Figure 1) is as follows:

Figure 1.  Structure of Busan 77

	The required acceptable fate guideline study on hydrolysis has been
submitted for Busan 77.  Other acceptable environmental fate studies
have also been submitted.  The Agency is using the submitted
environmental fate studies for the fate assessment of Busan 77 to
fulfill the re-registration requirements.

	Busan 77, also known as WSCP, is a water-soluble, cationic ionene
polymer with an average molecular weight of 3,386 g/mol.  Based on its
miscibility in water and high molecular weight, volatility from water is
highly unlikely.  It is also stable to both abiotic degradation
(hydrolysis and photolysis) and to metabolism in soil and sediment:water
systems.  In the presence of soil or sediment, tight sorption of nearly
all residues was observed almost immediately.   Busan 77 was almost
exclusively (96 %) found in the top two inches of 12 inch columns
leached with water.  Less than 1 % was found in the leachate collected
at the bottom of the columns.   These conclusions on mobility are
consistent with the fact that Busan 77 is positively charged and
soil/sediment is negatively charged.  As a result, Busan 77 is not
expected to contaminate surface and ground waters. 

	Busan 77 is not likely to bioaccumulation in fish based on a BCF value
of 2.  However, in the submitted study (MRID 00159308), the fish were
already stressed by high nitrite levels in the water and were not
healthy.  There was more mortality in the Busan 77 treatments relative
to the control.  As a result, there appears to be some acute risk to
fish from Busan 77.    

  

I.	Environmental Fate Assessment

Abiotic

	In a hydrolysis study conducted under abiotic and buffered conditions,
dimethyliminio [14C] Busan 77 (specific activity of 1.183 x 104 dpm/ul)
was stable in sterile aqueous buffer solutions adjusted to pH 5
(acetate), pH 7 (phosphate), and pH 9 (borate) that were incubated in
darkness at 25°C ± 1°C for up to 30 days.  The hydrolysis guideline
requirement (OPP 161-1) was fulfilled by this study (MRID No. 41407401).

	

	The photodegradation of labeled dimethyliminio[14C]Busan 77 (specific
activity of 2.039 x 104 dpm/ul) was studied in sterile pH 5, 7, and 9
aqueous buffer solutions exposed to artificial light for up to 30 days. 
Busan 77 was stable in pH 5 (acetate), pH 7 (phosphate), and pH 9
(borate) buffer solutions.   The study is acceptable (MRID No.
41420901).

Biotic

	The aerobic soil metabolism of Busan 77 (WSCP, 60 %) was studied using
two soils (loamy sand and silt loam) coated on TLC plates.  Samples were
taken at 0, 2, 3, 6, and 12 months.  Busan 77 was stable to aerobic soil
metabolism and no volatiles (CO2 or organic) were detected (MRID
40165202).  The aerobic soil metabolism (162-1) study is acceptable. 

The aquatic metabolism of Busan 77 was studied under aerobic (MRID
40334101, acceptable study) aquatic conditions in an acceptable study. 
In the study, dimethyliminio-labeled [14C]Busan 77 (0.977 mCi/g specific
activity) was applied at a nominal rate of 4.77 mg/L to a lake
water-sediment system from Wisconsin and incubated under aerobic (air)
conditions for up to 31 days in darkness at 25.0°C ( 2(C.  The
water:sediment ratio was 10:1 (20 mL water:2 g dry wt. sediment).  The
test system consisted of glass test tubes containing treated water and
sediment attached to a volatile trapping system for the collection of
CO2 and volatile organic compounds. Samples were collected after 0, 3,
7, 15, and 31 days.  Busan 77 was stable under aerobic aquatic
conditions.  The overall recovery of radiolabeled material in the total
system averaged 92.3 to 110.5 %.  Sediment percentages of applied
material increased from 30.5 % at time zero to 93.5-106.6 % by 7-31 days
after treatment, and water levels decreased from 66.1 % at time zero to
1.2-5.2 % by 7-31 days.  Carbon dioxide increased to a maximum of 5.4 %
by 31 days.  

In the anaerobic aquatic system (MRID 40165201, acceptable study),
dimethyliminio-labeled [14C]Busan 77 (0.977 mCi/g specific activity) was
applied at a nominal rate of 4.75 mg/L to a lake water-sediment system
from Wisconsin and incubated under anaerobic (nitrogen) conditions for
up to 365 days in darkness at 25.0°C ( 2(C.  The water:sediment ratio
was 4.5:1 (18 mL water:4 g dry wt. sediment).  The test system consisted
of screw cap bottles containing treated water and sediment attached to a
volatile trapping system for the collection of CO2 and volatile organic
compounds. Samples were collected after 0, 1, 14, 40, 69, 120, 162, 309,
and 365 days.   Busan 77 was stable in this study also.  The overall
recovery of radiolabeled material in the total system averaged 91.8 to
109.2 %.  Sediment percentages of applied material approximated the
total, and water never contained more than 2.2 % of applied.  Carbon
dioxide did not exceed 0.7 % of applied, and no organic volatiles were
detected.  

An acceptable soil column leaching study was performed using
dimethyliminio-labeled [14C]Busan 77 (0.93 uCi/mg specific activity) on
four agricultural soils.  These included sandy loam, silt loam, sand,
and silty clay loam.   On the average, 96.7 % of the applied
radioactivity was found in the top two inches of the columns (63-122 %).
 Less than one percent was found in the leachate of any column (MRIDs
0015706, 00157907).

	In an unacceptable study on bioconcentration in fish (MRID 00159308),
channel catfish were exposed to 3.6 ppm in soil that present in the
approximately 250 gallon tanks.  The sampling intervals were 0, 1, 3, 7,
10, 14, and 21 days.  The BCF values did not exceed 2 during the study,
indicating that bioconcentration is not likely to occur.  This
conclusion is consistent with the fact that Busan 77 is a cation that
will not concentrate in fat. However, the nitrite levels in the water
were too high which stressed the fish.  Also, the mortality was higher
in the treatment tank which indicates that in some conditions Busan 77
in water may cause some acute risk to fish.  

II.	Environmental Fate Assessment (EPI Suite Summary)

Because the environmental fate database was complete, EFED did not use
EPI-SUITE in this assessment.  

Surface Water and Ground Water Contamination:

Busan77’s use as a wide-spectrum biocide, most frequently as a
fungicide to combat the formation of slime in paper and pulp mill
operations may result in its direct release to the environment.  It is
expected to persist in the environment based on the abiotic and biotic
persistence.  APPENDIX

Environmental Fate Data for Busan 77

Busan 77 was registered with USDA on March 16, 1970.  Buckman
Laboratories, Inc. has submitted the required guideline studies for an
environmental fate assessment.  The Agency is using these environmental
fate studies for fate assessment of Busan 77 to fulfill the
reregistration requirements.  Table 1 below contains the chemical and
physical properties of Busan 77.

Guideline No./

Study Type	Results	MRID No./

Reference Information

830.6302

Color

	Light amber/pale yellow	46832601/42372401

830.6303

Physical state

	Clear liquid	46832601

Molecular Weight	3,368	Average , 7/10/91 Buckman letter

g/mol

Solubility (water)	1000	Assumed based on miscibility

mg/L

830.6304

Odor	Mild unpleasant, fishy	46832601

830.6313

Stability to normal and elevated temperatures, metals, and metal ions
Waived	46832601

830.6314

Oxidation/reduction

	compatible	46832601

830.6315

Flammability	>99.5 °C	46832601

830.6316

Explodability	NA	46915602

830.6317

Storage stability	Stable	42615901

830.6319

Miscibility	NA	46915602

830.6320

Corrosion characteristics	No evidence of corrosion of the container was
observed at the 3-mo. Interval. Study ongoing.	46915602/42615901

830.6321

Dielectric breakdown voltage	NA	46915602

830.7000

pH	6.9 - 7.38 ± 0.01	42372401/46832601

830.7100

Viscosity	1.521 (20°C) / 1.005 (40°C)	46832601

830.7200

Melting  point	NA 	42372401

830.7220

Boiling point	111 C	42372401

830.7300

Density	1.013 – 1.1417 g/ml	46832601/42372401

830.7370

Dissociation constant	Waived	47120304/42372401

830.7550

Partition coefficient	Waived	47120304

830.7950

Vapor pressure	10.8 mmHg (20 C)

14.4 mmHg (25 C)	42372401

Vapor pressure of water based on communication with registrant.  Vapor
pressure is likely insignificant.

Henry’s Law Constant	None calculated	Volatility not likely to occur
given the high MW and solubility. 

A.	Environmental Fate Guideline Studies

		Table 2 and the below guideline summaries contain the environmental
fate data for Busan 77.  Busan 77 is stable to abiotic and biotic
degradation, sorbs tightly to soil and sediment, and does not
bioconcentrate in fish.

Table 2.  Environmental Fate Properties of Busan 77

Guideline No./

Study Type	Results	Reference Information

835.2110

Hydrolysis	Mean: 103-137mg/L over 30 day period

The hydrolytic stability of aqueous solutions of Busan 77 was tested at
pH 5, 7 and 9. No degradation was observed at any tested pH over a 30
day period at 25 °C in the dark. The following table summarizes the
measured concentrations of Busan 77 during the study.	41407401/93062026

Smith, A. (1990) Determination of Aqueous Hydrolysis Rate Constant and
half-life of Busan 77: Final Report: Lab Project Number:
995-1089-6116-715: Lab Report Number 90-2-3216. Unpublished study
prepared by Springborn Laboratories, Inc. 32 p.

Acceptable

835.2210

Direct photolysis rate in water by sunlight	Avg. mean recovery: 79.5 ±
3.5%

Under the aseptic test conditions employed with a solution temperature
of 25.6 ± 1.6 °C for the pH 5 and 7 phase of this study and 25.7 ±
1.7 °C for the pH 9 phase of this study, Susan 77 is photolytically
stable. Definitive testing was performed over a 30 day period with no
appreciable degradation observed, within experimental error, in any
solution at any of the pHs tested. Busan 77 is considered photolytically
stable (EPA Standard Evaluation Procedure, 1985).	41420901/93062027

Smith, A. (1990) Determination of Aqueous Photolysis Rate Constant and
half-life of Busan 77: Lab Project Number: 995-1089-6117-720; 90-3-3251.
Unpublished study prepared by Springborn Laboratories, Inc. 37 p.

Acceptable

835.3100

Aerobic aquatic biodegradation 	First Experiment. Under aerobic aquatic
conditions, 14C-Busan 77 (5.07 ppm) rapidly became sediment-bound. In
this experiment, sediment bound residues increased from approximately
11% at Day 0 to 53% at Day 2 and retained in the range of 52% to 70% for
the 30-day study. Approximately 4.0% of the total dose was trapped as
CO2 and 0.1% of the applied radioactivity was trapped as organic
volatiles by Day 30. Total recoveries averaged approximately 63% for the
experiment, which resulted from strong adsorption of the test material
to laboratory glassware during sale extraction.

Second Experiment. In the second experiment, 14C Busan 77 (4.77 ppm)
rapidly because sediment bound in aerobic aquatic samples. This sediment
bound radioactivity increased from approximately 31% at Day 0 to 94% at
Day 1, and then remained fairly constant for the 31 day study.
Approximately 5% of the total applied radioactivity was trapped as CO2.
No radioactivity was detected as organic volatiles. Total recoveries
averaged 100.0% for the experiment.	MRID 40334101

Obrist, J. (1987) Aerobic Aquatic Metabolism of Busan 77: Laboratory
Project ID: HLA 6015-251: Final Report. Unpublished study prepared by
Hazleton Laboratories America, Inc. 69 p.

Acceptable

835.3300

Anaerobic biodegradability of organic chemicals	Under laboratory
conditions at 25°C ±2°. Busan 77 rapidly became sediment-bound in an
anaerobic aquatic system (Lake Mendota water and sediment) following
treatment at 4.75 ppm. Sediment bound residues accounted for more than
90% of the total applied dose at all sampling points (except Day 0)
through 365 days. The majority of the sediment bound radioactivity was
associated with the humic fraction after treatment with a sodium
hydroxide solution. Approximately 0.7% of the total applied dose was
detected in the carbon dioxide trap, and less than 0.1% of the applied
radioactivity was found in the organic volatiles trap.	40165201

Obrist, J.  1987.  Anaerobic Aquatic Metabolism of Busan 77.  Hazelton #
6015-250.  Unpublished study prepared by Hazelton Laboratories Inc. 50
p.

Acceptable

835.3300

Aerobic Soil Metabolism	Under laboratory conditions at 23-25oC ± 1 oC,
Busan 77 was stable to aerobic soil metabolism.  Good material balance
was observed   	40165202

Das, Y. (1987) Aerobic Soil Metabolism of WSCP: Biospheric No. 84E-301A.
Unpublished study prepared by Biospheric Inc. 50 p.

No record review, based on material balance it appears to be valid.

835.1220

Soil Column Leaching	Busan 77 was found almost exclusively (96 %) in the
top 2 inches of 12-inch columns (average).  <1 % was found in the
leachate of the columns.   	00157906

Cargile, N. (1986).  Soil column leaching of 14C-WSCP.  Final Report
Project No. 84E-303L.   Study conducted by Biospherics, Inc.

00157907

Cargile, N.  Leaching characteristics of Aged 14C-WSCP.  Final Report
Project No. 34E-303AL.  Study conducted by Biospherics, Inc.

Acceptable

850.1730

Bioconcentration in Fish 	Busan 77 did not bioconcentrate (BCF=2) in
channel catfish.  	00159308

Barrows, B.A.  1985.  Bioconcentration of 14C-Radiolabeled WSCP in the
Channel Catfish, Ictalurus punctatus, in a Static Test System.  Study
conducted by Biospherics, Inc., and submitted by Buckman Laboratories.

Unacceptable

	1.	Hydrolysis (OPP Guideline Number 161-1; MRID No.  41407401)

	The hydrolysis study was reviewed by the Agency and fulfills the
hydrolysis data requirement for Busan 77.  Under abiotic and buffered
conditions, dimethyliminio [14C] Busan 77 (specific activity of 1.183 x
104 dpm/ul) was stable in sterile aqueous buffer solutions adjusted to
pH 5 (acetate), pH 7 (phosphate), and pH 9 (borate) that were incubated
in darkness at 25°C ± 1°C for up to 30 days.   

	2.	Photodegradation in Water (OPP Guideline No. 161-2; MRID No
41420901)

	The photodegradation in water study was reviewed by the Agency and
classified as acceptable.  The photodegradation of labeled
dimethyliminio[14C]Busan 77 (specific activity of 2.039 x 104 dpm/ul)
was studied in sterile pH 5, 7, and 9 aqueous buffer solutions exposed
to artificial light for up to 30 days.  Busan 77 was stable in pH 5
(acetate), pH 7 (phosphate), and pH 9 (borate) buffer solutions.

	3.	Aerobic Soil Metabolism (OPP Guideline No. 162-1, MRID No. 40165202)

	There is no apparent data requirement for aerobic soil metabolism of
Busan 77, based on the Phase 4 review dated 9/1/92.  However, an
acceptable study was submitted.  The aerobic soil metabolism of Busan 77
(WSCP, 60 %) was studied using two soils (loamy sand and silt loam)
coated on TLC plates.  Samples were taken at 0, 2, 3, 6, and 12 months. 
Busan 77 was stable to aerobic soil metabolism and no volatiles (CO2 or
organic) were detected

	3.	Anaerobic Aquatic Metabolism (OPP Guideline No. 162-3; MRID No
40165201).

	This anaerobic aquatic metabolism study was reviewed by the Agency and
is considered acceptable.   In the study, dimethyliminio-labeled
[14C]Busan 77 (0.977 mCi/g specific activity) was applied at a nominal
rate of 4.75 mg/L to a lake water-sediment system from Wisconsin and
incubated under anaerobic (nitrogen) conditions for up to 365 days in
darkness at 25.0°C ( 2(C.  The water:sediment ratio was 4.5:1 (18 mL
water:4 g dry wt. sediment).  The test system consisted of screw cap
bottles containing treated water and sediment attached to a volatile
trapping system for the collection of CO2 and volatile organic
compounds. Samples were collected after 0, 1, 14, 40, 69, 120, 162, 309,
and 365 days.   Busan 77 was stable in this study also.  Under anaerobic
conditions, the overall recovery of radiolabeled material in the total
system averaged 91.8 to 109.2 %.  Sediment percentages of applied
material approximated the total, and water never contained more than 2.2
% of applied.  Carbon dioxide did not exceed 0.7 % of applied, and no
organic volatiles were detected.  

	4.	Aerobic Aquatic Metabolism (OPP Guideline No. 162-4; MRID No.
40334101)

This aerobic aquatic metabolism study was reviewed by the Agency and is
considered acceptable.  In the study, dimethyliminio-labeled [14C]Busan
77 (0.977 mCi/g specific activity) was applied at a nominal rate of 4.77
mg/L to a lake water-sediment system from Wisconsin and incubated under
aerobic (air) conditions for up to 31 days in darkness at 25.0°C ( 2(C.
 The water:sediment ratio was 10:1 (20 mL water:2 g dry wt. sediment). 
The test system consisted of glass test tubes containing treated water
and sediment attached to a volatile trapping system for the collection
of CO2 and volatile organic compounds. Samples were collected after 0,
3, 7, 15, and 31 days.   Busan 77 was stable under aerobic aquatic
conditions.  Under aerobic conditions, the overall recovery of
radiolabeled material in the total system averaged 92.3 to 110.5 %. 
Sediment percentages of applied material increased from 30.5 % at time
zero to 93.5-106.6 % by 7-31 days after treatment, and water levels
decreased from 66.1 % at time zero to 1.2-5.2 % by 7-31 days.  Carbon
dioxide increased to a maximum of 5.4 % by 31 days.  

	5.	Soil Column Leaching (OPP Guideline No. 163-1, MRID No. 00157906,
00157907)

This soil column leaching study was reviewed by the Agency and is
considered acceptable.  A soil column leaching study was performed using
dimethyliminio-labeled [14C]Busan 77 (0.93 uCi/mg specific activity) on
four agricultural soils.  These included sandy loam, silt loam, sand,
and silty clay loam.   On the average, 96.7 % of the applied
radioactivity was found in the top two inches of the columns (63-122 %).
 Less than one percent was found in the leachate of any column.  

	6.	Bioaccumulation in Fish (OPP Guideline No. 165-4; MRID No. 00159308)

	In an unacceptable study on bioconcentration in fish (MRID 00159308),
channel catfish were exposed to 3.6 ppm in soil that present in the
approximately 250 gallon tanks.  The sampling intervals were 0, 1, 3, 7,
10, 14, and 21 days.  The BCF values did not exceed 2 during the study,
indicating that bioconcentration is not likely to occur.  This
conclusion is consistent with the fact that Busan 77 is a cation that
will not concentrate in fat. However, the nitrite levels in the water
were too high which stressed the fish.  Also, the mortality was higher
in the treatment tank which indicates that in some conditions Busan 77
in water may cause some acute risk to fish.  Data Gap Table:  See Table
below.

Environmental Fate Data Requirements for Busan 77

OPP Guideline	Data

 Requirement	MRID

No.	Data Requirement

 Status/Comments

161-1	

Hydrolysis

(Required)

	41407401	Satisfied

161-2	

Photodegradation in Water 

	41420901	Not required, but acceptable

162-3

	

Anaerobic Aquatic Metabolism

	40165201	Not required but acceptable

162-4

	

Aerobic Aquatic Metabolism 

	40334101	Not required, but acceptable

163-1	

Adsorption/Desorption 	None	Not required

163-1	

Soil  Column Leaching

	00157906

00157907	Not required, but acceptable

165-4	

Accumulation Studies in Fish 	00159308	Not required but acceptable

BIBLIOGRAPHY

157906	Cargile, N. (1986) Soil Column Leaching of [Carbon-14]- WSCP:
Final Report: Project No. 84E-303L. Unpublished study prepared by
Biospherics Inc. 13 p.

157907	Cargile, N. (1986) Leaching Characteristics of Aged [Carbon-14]-
WSCP:Final Report: Project No. 84E-303AL. Unpublished study prepared by
Biospherics Inc. 9 p.

159308	Barrows, B. (1985) Bioconcentration of [Carbon 14]-radiolabelled
WSCP in the Channel Catfish, Ictalurus punctatus, in a Static Test
System: Biospherics Project No. 84E-301. Unpublished study prepared by
Biospherics Inc. 18 p.

159309	Martinson, J. (1985) Solution Hydrolysis of WSCP: Final Report:
Biospherics Project No. 83-E-605H. Unpublished study prepared by
Biospherics Inc. 58 p.

159310	Martinson, J. (1985) Photodegradation of WSCP in Water: Final
Report: Project No. 83-E-605P. Unpublished study prepared by Biospherics
Inc. 28 p.

159311	Biospherics, Inc. (1986) Summary of [Carbon 14]-WSCP Soil Column
Leaching Study Conditions: Project No. 84E-303L. Un-published study. 6
p.

159312	Cargile, N. (1986) Leaching Characteristics of Aged [Carbon 14]-
WSCP: Draft Final Report: Project No. 84E-303AL. Un-published study
prepared by Biospherics Inc. 8 p.

40165201 	Obrist, J. (1987) Anaerobic Aquatic Metabolism of Busan 77:
Final Report: Laboratory Project Identification: HLA 6015-250.
Unpublished study prepared by Hazleton Laboratories America, Inc. 50 p.

40165202	Das, Y. (1987) Aerobic Soil Metabolism of WSCP: Biospheric No.
84E-301A. Unpublished study prepared by Biospheric Inc. 50 p.

40334101	Obrist, J. (1987) Aerobic Aquatic Metabolism of Busan 77:
Laboratory Project ID: HLA 6015-251: Final Report. Unpublished study
prepared by Hazleton Laboratories America, Inc. 69 p.

41407401	 Smith, A. (1990) Determination of Aqueous Hydrolysis Rate
Constant and Half-life of Busan 77: Final Report: Lab Project Number:
995-1089-6116-715: Lab Report Number 90-2-3216. Unpublished study
prepared by Springborn Laboratories, Inc. 32 p.

41420901	Smith, A. (1990) Determination of Aqueous Photolysis Rate
Constant and Half-life of Busan 77: Lab Project Number:
995-1089-6117-720; 90-3-3251. Unpublished study prepared by Springborn
Laboratories, Inc. 37 p.

46276202	Watson, C.; Eickhoff, J. (2004) Bubond 60 Tolerance Exemption
Petition: Data Evaluation Records (DERs) for Ecotoxicology,
Environmental Fate and Plant Protection Studies Submitted in Support of
Busan 77 and WSCP. Project Number: BUBOND/2004/3. Unpublished study
prepared by Toxcel LLC. 253 p.

93062026  	Drake, K. (1990) Buckman Labs Inc Phase 3 Summary of MRID
41407401. Busan 77- Determination of Aqueous Hydrolysis Rate Constant
and Half-Life: Laboratory ID: 90-2-3216. Prepared by Springborn
Laboratories, Inc. 11 p.

93062027	Drake, K. (1990) Buckman Labs Inc Phase 3 Summary of MRID
41420901. Busan 77- Determination of Aqueous Photolysis Rate Constant
and Half-Life: Laboratory ID: 90-3-3251. Prepared by Springborn
Laboratories, Inc. 17 p.

93062028	 Drake, K. (1990) Buckman Labs Inc Phase 3 Summary of MRID
40165201. Busan 77- Anaerobic Aquatic Metabolism: Laboratory ID: HLA
6015-250. Prepared by Hazleton Laboratories America, Inc. 10 p.

93062029	 Drake, K. (1990) Buckman Labs Inc Phase 3 Summary of MRID
40334101. Busan 77- Aerobic Aquatic Metabolism: Laboratory ID: HLA
6015-251. Prepared by Hazleton Laboratories America, Inc. 10 p.

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Related MRIDs 00157907. Busan 77 - Soil Leaching: Laboratory ID.
84E-303-L. Prepared by Biospherics, Inc. 13 p.

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