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e <br /> r- <br /> � orf <br /> Ti <br /> �F <br /> ,X May 10, 3987 AGS 86103-2 <br /> Cardlock Station #27 - Stockton, California <br /> r <br /> above the sand to prevent cement from entering the sand pack. <br /> The remaining annulus was backfilled with neat cement to grade. <br /> � rt <br /> Installation of the sanitary seal was witnessed by personnel of <br /> the San Joaquin Local Health District. Graphic representations <br /> of well construction are shown on the right margin of the Boring <br /> xr <br /> Logs (Plates P-5 through P-16) . <br /> ' = A cast-iron and steel C.N.I. utility box was placed over each <br /> �a <br /> well head and set in concrete flush with the surrounding surface <br /> #z <br /> grade. The utility box has a water-tight, threaded seal to <br /> �n <br /> protect against surface water infiltration and requires a <br /> ` 3 specially designed spanner wrench to open. This reduces the <br /> possibility of well vandalism or accidental disturbance. <br /> ! 1 <br /> GROUND WATER SAMPLING: <br /> h <br /> Y <br /> � t- <br /> ,1 <br /> Samples of ground water from the monitoring wells were collected <br /> for subjective and laboratory analyses. Subjective water samples <br /> were collected from the wells by lowering a teflon bailer <br /> approximately halfway through the air/water interfage. The <br /> - ; samples were retrieved and inspected for the presence of floating <br /> product,-product odor, sheen or emulsion. No subjective evidence <br /> " v of contamination was detected. <br /> 7 <br /> _ BQ010998 <br /> .4t��o/!ed GeoSvs��nrs <br />