Laserfiche WebLink
clay. The driller identified it as what is called "Stockton <br /> Blue. " Refer to SIX for a lithologic plot of the well. <br /> After cleaning flights, they were run back to bottom, and 2' OD, <br /> Schedule 40, flush-joint PVC was inserted in the hole to bottom. <br /> ' It was equipped with a threaded bottom cap, 15' of shop-made <br /> slots, (top at 19' , ) and black pipe to the surface. The well was <br /> gravel packed with 5 sacks of #2 1/2 RMC Lonestar gravel, and one <br /> (1) bucket of bentonite pellets were placed on top of the gravel, <br /> and covered with sufficient water to insure that the bentonite <br /> would swell and form a tight seal. The top of the casing was <br /> ' sealed to prevent entry of debris, but it was agreed by the <br /> County EHD representative that cementing the annulus could be <br /> deferred until all wells were placed. <br /> The rig was then relocated over monitoring well No. 1, (MW-1, ) <br /> and after removing asphalt, drilling began using clean flights; <br /> the crew had brought enough clean ones to save time by having to <br /> steam clean them between wells. <br /> The top 1 ' was a mixture of clay, sandy clay & cobbles, which <br /> graded to tan to brown slightly sticky sandy clay <br /> At 5' , a clean core barrel was inserted, and was driven from 5' <br /> to 6' 6" with blow counts of 3-8-10. Recovery was 15" of tan to <br /> buff, slightly sticky clay with a mottled appearance. It graded <br /> to a buff to brown, slightly sticky clay. no odors were noted. <br /> Some pieces of black asphalt were observed in the drill cuttings. <br /> ' The bottom tube was sealed and preserved per standard procedures; <br /> the remaining tubes and drill cuttings were placed in a metal <br /> ' drum nearby. <br /> Augers were advanced to 10' ; drill cuttings were primarily a tan <br /> to light brown sandy clay. A clean core barrel was inserted, and <br /> was driven from 10' to 11' 6" with blow counts of 7-12-20. Full <br /> recovery was obtained, and when the sampler barrel was opened, a <br /> strong petroleum odor was noted. The core consisted of dark gray <br /> ' sticky clay, with some thin beds of dark gray sandy clay. No <br /> free product was evident. The bottom tube was sealed & preserved <br /> per standard procedures described earlier. <br /> Drilling continued to 15' ; a clean sampler barrel was inserted in <br /> the flights, and was driven from 15' to 16' 6" with blow counts of <br /> 4-5-8. When the core barrel was opened, a very strong petroleum <br /> odor was noted. Recovery was 9" of dark gray sandy clay. A <br /> sample was sealed and preserved as described above. <br /> 6 <br />