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Scope of Requested Services Blaine Tech Services, Inc. was asked to provide specialized equipment, instruments and personnel for a well development project being overseen by Pacific Environmental Group, Inc.. Execution of Recent Work Our personnel arrived at the site on Wednesday, August 2, 1995 and developed four wells in accordance with our client's specifications communicated to us by Mr. Dave Reinsma. A summary of the well development actions is presented in the well development log at the end of this report. STANDARD PROCEDURES Overview Because formations vary in their geologic composition, transmissivity and water production capability, well development cannot be reduced to a set of fixed procedures that will always produce a complete and satisfactory result if just repeated for a predetermined period of time:. Instead, well development is accomplished by selecting procedures that (a.) repair that portion of the native formation that was disrupted by the cutting action of the well drilling tool, and (b.) promote the flow of water out of the formation into the newly installed well (through the granular filter pack.and well screen). Execution of development actions that are not appropriate to the native formation will be inefficient and in some cases deleterious. • ti Time constraints usually prevent a precise classification of the saturated zone materials by analysis of soil samples for physical characteristics at a laboratory equipped to do physical testing. Physical tests cannot usually be completed during the brief timespan of a project that combines exploration, design, and well installation into a one day effort. Instead, the subjective judgments of the field geologist are recorded in the boring log and well installation log. The field geologist must quickly evaluate soil types by their appearance and observable characteristics and record his or her estimation of the material in the log according to the categorical judgments provided by the Unified Soil Classification System. These categorical judgments are also the basis for determining the final construction specifications of the well. The well's total depth, the length of the screened interval, the slot size, and the size of the sand used in the filter pack are all decided on the appearance of the soil cuttings and whatever quick `•.� tests the field geologist can perform. Because the physical specifications for the well are set at that moment and cannot be corrected later, any misclassification of soil that results in a Well Development Report 950802DV Pacific Environmental Group,Inc./ Chevron 09-4183 1 Lodi Page 2