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EA ENGINEERING. SCIENCE, AND TECHNOLOGY, INC. Richard Reed 16 September 1987 State of California Page 2 cement. We have attempted to grout the holes, however, it was found that they self heal so rapidly that no grout could be placed (the probe is only 5/8-inch in diameter ) . No excavation or boring is made and no soil is extracted, removed or excavated from the ground. The entire study is always conducted under the supervision of a registered professional engineer or geologist. All reports generated are signed by either a registered engineer or regis- tered geologist. This is not an activity which to the best of my knowledge is ever performed by a well driller, and I know of no C-57 license holder who ever has or is qualified or capable of conducting a soil vapor survey. I do not believe a soil vapor survey in any way results in con- struction of a well. Water is not extracted or sampled, no soil samples are collected, and no permanent structure is placed. A probe is simply inserted into the soil and removed. I believe this activity is exempt from C-57 licensing as it is an investi- gation conducted by a licensed professional engineer. The soil vapor survey is an integral part of a great many contam- inant investigations. To require that a consultant must possess a C-57 license to conduct such a survey would seriously hamper current efforts to find and clean up contaminated soil and ground water, and would in no way improve the quality of such investiga- tions. I am requesting that you review this matter and issue an opinion. Please provide copies of your opinion to both the San Joaquin Local Health District and to myself . I appreciate your assis- tance in this matter and should you require additional informa- tion or have questions please do not hesitate to contact me. Sincerely, Robert E. Hinchee, Ph. D. , P.E. REH:cam cc: James M. Kerr, Jr . , P.G. Robert S. Stolz Laurie A. Cotulla, RS