I have taught environmental protection training courses via IPM
programs. One of these was done at the request and sponsored by U.H. Hilo.
I was a former County Sanitarian and a civil service rated Environmental
Health Technician. Formerly licensed in California and Idaho as a pest
control advisor and consultant (not required in Hawaii).
I am experienced in environmental toxicology and pollution control in Hawaii and knowledgeable in the laws and in field experience doing surveys regarding solid wastes, hazardous wastes and materials, buried fuel tanks, pesticide contamination, geological surveys, soil mapping and bioremediation of hydrocarbons. We specialize in pre-purchase real estate environmental assessments for residential and commercial buyers of real estate in Hawaii, as well as assessment of agricultural potential for agricultural properties. We have information sources via remote computer data base on all hazardous materials and laws. We offer fast service and local experience combined with scientific expertise.
Bio-remediation Service, oil spills, fuel tank removal, Asbestos
testing
HOUSE AND AGRICULTURAL LANDS INSPECTION REPORTS, ENVIRONMENTAL
HAZARDS AND MITIGATION REPORTS, GEOLOGICAL HAZARDS, TOXIC WASTES
Environmental Reviews, Assesments and Impact Statements
e-mail drfist@bigisland.net
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The Use of Humic Acids to Enhance the Removal of Aromatic Hydrocarbons
from
Aquifers Contaminated with Petroleum Products.
Pump and treat is a technology commonly used for the remediation of
groundwater contaminated by petroleum hydrocarbons. However, the efficiency
of the technology is limited by the low solubility of petroleum hydrocarbons
and other factors related to the physical hydrogeological conditions.
To
improve the chemical dissolution process, surfactants, such as sodium
dodecylsulfate, ethoxylated alcohols, alkylethoxylates, etc., are often
injected into the contaminated aquifers. The use of synthetic surfactants,
however, may interfere with the biodegradation of the petroleum hydrocarbons
or cause excessive bacterial growth and clogging of the aquifer. Humic
acids, which are found in soil and groundwater and have surface activity
similar to that of surfactants. The objective of this study is to
investigate the influence of humic acids on petroleum products present
in
the saturated zone and to evaluate the potential use of humic acids,
as a
cost effective adjuvant, to enhance dissolution and transport of aromatic
hydrocarbons as part of a groundwater remediation system.
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We have a special Bacteria/Fungal culture for oil spill cleanups to
be used with Humates
e-mail for info.
Spills
S. Lesage, H. Xu, K.S. Novakowski and S. Brown
In: Emerging Technologies for Hazardous Waste Management VIII. D.W. Tedder
(Editor), 1996 Extended Abstracts for the Special Symposium of the
Industrial and Engineering Chemistry Division. September 9-11, 1996,
Birmingham, Alabama. American Chemical Society. pp. 743-746, 1996.
Contamination of groundwater by gasoline and diesel fuels is a widespread
environmental problem. Polynuclear aromatic hydrocarbons (PAHs) in gasoline
and diesel fuels are of particular concern because many are carcinogenic and
degrade poorly. Humic acids, found in soil and groundwater, have a surface
activity similar to that of surfactants. It was found that a 1 g/L solution
of humic acids enhances the dissolution of PAHs from diesel fuel up to
ten-fold and could be used cost-effectively to enhance dissolution and
transport of aromatic hydrocarbons and provide an environmentally suitable
alternative to artificial surfactants for cleaning up soil and groundwater
contaminated by petroleum fuels. The experiment was carried out in an indoor
large scale (2 m x 2.3 m x 6 m) model aquifer with a grid of 360 monitoring
points. The diesel source was emplaced in the saturated zone and the humic
acid solution recirculated through an injection withdrawal system.