Work at JAYCOR on chemical reaction equations and reaction flux correlations has revealed that the compositions of Anvil Points kerogen, char, and mineral matter are inconsistent with the simple treatment adopted when APREA was developed. There are substantial amounts of chemically bound H20 associated with mineral matter in both raw and spent shales. Most of the spent-shale hydrogen is in bound H20. Better estimates for sulfur and oxygen in char and for sulfur in kerogen have been introduced. It has recently been discovered that iron oxide from ankerite decomposition increases in oxidation state. The resulting new mineral oxygen is now included in our spent-shale analysis. The foregoing changes affect the composition and heat of combustion of organic matter as well as the total oxygen and ash attributed to both raw and spent shale. APREA has been revised to reflect all these changes. At the same time, we have revised the definitions of raw and spent-shale Fischer assay coke to more realistically reflect their fixed carbon contents. Since refinements to APR EA were necessary, we took this opportunity to introduce two new parameters designed to better characterize shale particle size distribution. The purpose of this report is to document all the foregoing refinements.