This quarterly report describes work on Task 1: Field test and sell prototype to Ellis Equipment, Ltd; Task 2: Design, build, and field test two prototypes; and Task 3: Produce and sell Pegasus to farmers. The equipment has been built to shred stalks, deeply till the soil, and prepare seedbeds for cotton plants. The equipment has been field tested in Australia and is currently being field tested in California and Arizona. Unexpected problems appeared with hard dry soils and this report describes improvements made.

The performance of an optical parametric oscillator (OPO) with non-ideal input pump fields is investigated numerically. The analysis consists of a beam propagation calculation based on Fourier methods including walk-off in the non-linear crystal coupled with the three- wave interaction in the crystal. The code is time dependent enabling analysis of laser pulses. The pump beam aberrations are described by Zernike polynomials. The OPO investigated is a LiNbO{sub 3} crystal in a flat-flat resonator. The LiNbO{sub 3} crystal is cut to produce a 1.5 {mu}m signal and 3.6 {mu}m idler from a 1.06 {mu}m input pump field. The results show that the type of aberration is significant when predicting the output performance of the OPO and not simply the beam quality or M{sup 2} angular divergence of the pump beam. While thresholds for input pump beams with M{sup 2} = 2 only increase on the order of 10% over unaberrated beams, the divergence of the output fields can be much worse than the pump beam divergence. The output beam divergence is also a function of the input pump energy. Aberrated pump fields can also lead to angular displacements between the generated signal and idler fields.

Direct Chemical Oxidation is an emerging ``omnivorous`` waste destruction technique which uses one of the strongest known oxidants (ammonium peroxydisulfate) to convert organic solids or liquids to carbon dioxide and their mineral constituents. The process operates at ambient pressure and at moderate temperatures (80--100 C) where organic destruction is rapid without catalysts. The byproduct (ammonium sulfate) is benign and may be recycled using commercial electrolysis equipment. The authors have constructed and initially tested a bench-scale facility (batch prereactor and plug-flow reactor) which allows treatability tests on any solid or liquid organic waste surrogate, with off-gas analysis by mass spectroscopy. Shake-down tests of the plug flow reactor on model chemical ethylene glycol confirmed earlier predictive models. Pre-reactor tests on water-immiscible substances confirmed destruction of cotton rags (cellulose), kerosene, tributyl phosphate and triethylamine. The process is intended to provide an all-aqueous, ambient pressure destruction technique for difficult materials not suitable or fully accepted for conventional incineration. Such wastes include solid and liquid mixed wastes containing incinerator chars, halogenated and nitrogenated wastes, oils and greases, and chemical or biological warfare agents.

This project will provide a detailed example, based on a field trial, of how to evaluate a field for EOR operations utilizing data typically available in an older field which has under gone primary development. The approach will utilize readily available, affordable PC-based computer software and analytical services. This study will illustrate the steps involved in: (1) setting up a relational database to store geologic, well-log, engineering, and production data, (2) integration of data typically available for oil and gas fields with predictive models for reservoir alteration, and (3) linking these data and models with modern computer software to provide 2-D and 3-D visualizations of the reservoir and its attributes. The techniques are being demonstrated through a field trial on a reservoir, Pioneer Field, a field that produces from the Monterey Formation, which is a candidate for thermal EOR. Technical progress is summarized for the following tasks: (1) project administration and management; (2) data collection; (3) data analysis and measurement; (4) modeling; and (5) technology transfer.