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Work Plan Ranch Market Page 3 of 7 The cement or bentonite grout will be placed in the annulus by the use of a trime pipe, if the total annulus seal distance is over thirty feel.(Bul. 74-90 CA Water Well Standards) The well will be developed by bailing within a day of drilling,to remove most of the sediment within the casing and to remove bridging fines within the slots and sand pack. This will be done by surging,using the well water if possible. If not,then only potable water may be used. A log of the amount of introduced water will be kept and its use will be kept to a minimum. Bailing and surging will continue until the water does not contain any line silt or clay. The amount of water added to the well to develop it must be removed from the well during development. All purged water will be stored in drums,the drums will be sealed and left on site until the condition of the water is assessed. Sampling Protocol Soil samples will be obtained from the core samples taken every five feet during drilling. A split spoon sampler with brass sleeves will be used. The samples will remain within the brass sleeve,covered with aluminum foil and capped with the plastic caps which are supplied with the sleeves. The plastic cap will be taped to the brass sleeve using duct tape so that an airtight seal is obtained Samples will be marked and placed in a cooler of ice,until they are taken to the laboratory,which should be within 48 hours of the drilling. A Chain of Custody will be filled out by the sampler and signed by the laboratory. The split spoon sampler and the brass sleeves will be decontaminated before each sampling event. They will be washed with detergent and water,then rinsed thoroughly with clean water. • Core samples can be measured with a OVA meter and the readings will be recorded on the drill log. These readings will be used to help select the cores to be sent for laboratory analysis. If any contaminated fluid is detected,it will be stored in drums and then sent for recycling. Water The equipment used to withdraw a groundwater sample will be a two inch PVC bailer. One bailer will be used to purge the well and the other will be used to withdraw the sample. All equipment,including the bailers,baling cord and the water depth measuring device must be decontaminated prior to entering any well. The depth to ground water will measure from the highest point on the tip of the casing to the surface of the water table. The devise used will be an electric conductivity devise which trips a re light and a buzzer when the probe touches water. A minimum of three measurements will be made at each well,the final reading will be noted after two or more readings do no vary by more than 0.03 feet. Once the depth to water is known,the tape and probe will be withdrawn from the well and thoroughly dried. A small amount of water paste will be placed on the axis of the probe and the prove will be lowered to the water table. Care will be taken as not to allow the probe to descend into the water below the contact point. Then the prove will be withdrawn rapidly and inspected for signs of fluid above the contact point. If fluid is noted,the sample will be smelled to verify it is fuel,then the thickness of the fuel will be noted on the measuring log. Water sample will be obtained as follows: A. One full well volume of water will be withdrawn from the well • B. The parameters of pH,conductivity and temperature will be measured C. A second and third well volume of water will be withdrawn and the parameters remeasured,if the results vary by more than 10%,then step C is repeated