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R ' <br /> h+ <br /> rSYSTEM <br /> EXPLANATION OF THE MYRIASFIS SURVEY <br /> WITHIN INLAND WATERWAYS <br /> CGG Land Seismic: has developed a portable seismic recording <br /> I system capable of: exploring for natural resources , specifically' <br /> oil and gas , in a transitional shallow marine environment . <br /> This system, referred to as the pyrjaseis system, is by <br /> design capable of acquiring seismic information inregions <br /> g p seismic operation. have <br /> where , in the past , conventional. <br /> been un success full . 7'he Myriasei.s system is scheduled to be <br /> employed in. the delta region this year , 'I have provided ,. <br /> for your information , a brief explanation which details what <br /> operational procedures can be anticipated when conducting this <br /> survey . This description will deal primarily with operations <br /> Wand on the water ; methods utilized on land are quite <br /> different and not detailed herein . <br /> ' PHAI <br /> PERMIT AND SURVEY <br /> ' PHASE <br /> SE all permits have been obtained from the required <br /> agencies having jurisdiction within the Delta Hien survey <br /> operations will commence . A survey crew will anchor a <br /> water buoy at various locations 165 feet apart . These locations <br /> are defined onhe attached map , All buoys will be approv��.�! <br /> � <br /> by the U . S . Coast Guard and .they will display a flashing <br /> yellow beacon so as not to hinder vessel traffic at night ; <br /> No buoys will be placed in the navigable deep water shipping <br /> channels . <br /> 1'kf.ASl; II DRILL OPERATIONS <br /> This survey will utilize the shothole technique whereby <br /> a specially designed vessel will drill a series of shotholes <br /> to a depth of 50 feet below the bottom of the water channel . <br /> The drill vessel , referred to as a drill pontoon , will undergo <br /> safety inspections by the San Joaquin County Sheriff ' s <br /> Department prior to operations . A 5 pound explosive charge <br /> and a disposable hydrophone , or earth sounding devine , wil .., <br /> be Lowered ipto each drillhole . The hole will then be backfilled <br /> to the surface ( channel bottom) with a compound of coarse <br /> bentonite clay . :This compound will completely seal the hole <br /> and alleviate any potential problems pertaining to blowouts <br /> or the mixing of subsurface aquafers . The handling of explosives <br /> will conform to regulations unposed by Cal . O . S .H . A , and the <br /> agency having local jurisdiction . Storage of explosives will <br /> be within approved powder magazines . <br /> Once the drill, and hole loading procedures are completed then <br /> a cap wire will extend from the hole up to the water buoy . <br /> This wire will be inconspicuously attached to the buoy where <br /> it will remain until detonation . To insuie the safety of the <br /> general public a security-pat:rolwan will. Ve dispatched to <br /> monitor the. buoys . <br /> 4 <br />