REP26623

• Permit No: M1986104
• IBM Index Class Name: Report
• Doc Date: 12/18/1990
• Doc Name: DRAFT SAMPLING AND ANALYSIS PLAN FOR THE MONTGOMERY PIT FACILITY
• Media Type: D
• Archive: No

Ecological studies indicate the acute toxicity of Bromacil ranges from being essentially nontoxic
to slightly toxic for birds, mammals, honey bees, fish, and marine species. Chronic toxicity is
currently under investigation. Bromacil is acutely toxic to most plants. While being practically
non-toxic, Bromacil is moderately persistent in the environment. Bromacil's half-life in field
dissipation studies was reported to range between 124 and 155 days. The compound is
relatively resistant to hydrolysis under normal conditions, but is biodegradable under anaerobic
conditions in soils.
' Bromacil is regulated under the Federal Insecticide, Fungicide, and Rodenticide Ad (FIFRA)
and the Food Quality Protection Act (FQPA) of 1996. Due to its low toxicity, this chemical is not
listed under RCRA, CERCLA, SARA, SWDA, or other lists of federally or state regulated
chemicals.
(Reference: USEPA. 1996. Reregistration Eligibility Decision (RED) Document. EPA -738-F-
96-013.)
Diesel
Diesel fuel consists of a mixture of various petroleum hydrocarbons ranging from C-10 to C-20
compounds. Because diesel fuel is composed mainly of the higher molecular weight
hydrocarbons, it exhibits relatively low volatility, water solubility, and mobility compared to
gasoline and lighter weight hydrocarbons. Depending on its specific formulation, diesel fuel can
contain froml0 to 35 percent aromatic hydrocarbons. Typical aromatic hydrocarbons contained
in diesel fuel include alkylated benzenes; benzene, toluene, ethylbenzene, and xylenes (BTEX);
and naphthalenes. BTEX concentrations are typically low.
Because diesel fuel is a mixture of compounds, risks associated with diesel fuel released to the
' environment are driven by its potentially toxic constituents. The more toxic compounds found in
diesel fuel include the BTEX compounds and naphthalene.
' (Reference: ASTM Method ES 38-94. 1994. Emergency Standard Guide for Risk-Based
Corrective Action Applied at Petroleum Release Sites.)
Dicamba (3,6-dichloro-O-anisic acid)
EPA has classified Dicamba as Toxicity Category III (slightly toxic), general use weed killer.
Dicamba is a benzoic acid weed killer and is corrosive to skin in its pure form. The presence of
Dicamba in extremely low concentrations in samples collected during the preliminary site
assessment indicates it was a possible impurity in the formulation or packaging of the released
chemicals.
' Dicamba is slightly toxic by oral, dermal, and inhalation pathways. Chronic exposure to low
levels of Dicamba may result in body weight loss due to its tendency to suppress the appetite.
EPA studies indicate reproductive effects are unlikely due to chronic exposure to Dicamba.
Also, studies show Dicamba is non-carcinogenic, non-mutagenic, and non-teretogenic.
Dicamba does not accumulate in mammalian tissues.
Dicamba is practically nontoxic to fish and birds, and is reported to pose little threat to wildlife.
This weed killer is moderately persistent. Its half-life in soils in on the order of 1 to 4 weeks. It
B&B Excavating, Inc., Edwards, Colorado December 17, 1998
Montgomery Pit Facility 39210-003-034
' Draft Sampling and Analysis Plan 15 DAMES 8~ MOORE