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R o <br />LOG OF BORING MW -7 <br />E n vi ro n rn qe n tom€ ! <br />(Page 2 of 2) <br />Huntbrook Holdings LLC <br />Date Started/Completed 10/8/2013 Drill Rig : CME -75 <br />3138 East Main Street <br />Hole Diameter : 8.25 -in. Logged By : M. Berrington, PG #7124 <br />Stockton, CA <br />Drilling Method : Hollow stem auger Survey By Morrow Surveying <br />Sampling Method : 2.25-in.x18-in. split spoon Northing/Easting Coord: 2170786.8/6346932.5 <br />Installation of Monitoring Wells MW -4. MW -6, <br />MW -7, MW -8, and Borings RDM-1 and CPT -1 <br />Drilling Company/Driller: All Well Abandonment/J. Ceia Casing Elev. : 27.97 <br />Sample Interval <br />Sampler Type <br />Lab Sample <br />SS Split Spoon <br />0 Int. Sampled <br />ST Shelby Tube <br />m <br />® Lost <br />PS Piston Sampler <br />Well: <br />MW <br />-7 <br />La) <br />U <br />S <br />Surf. <br />CO <br />= <br />M <br />AL Clear Acetate <br />Q <br />0 <br />Elev. <br />0 <br />28.29 <br />? � <br />DESCRIPTION <br />9 <br />Lab No. <br />m <br />cn <br />35 <br />7 <br />4 <br />20 <br />WELL CONSTRUCTION <br />MW -7-36.5' <br />42 <br />Date Compl. : 10-8-13 <br />CL <br />Hole Diameter : 8.25 in. <br />Drill. Method : HSA <br />— <br />WELL CASING: <br />SILT: 60% silt, 30% clay, 10%fine <br />Material : Sch. 40 PVC <br />grained sand; very dark grayish <br />Diameter :2 -in. <br />40 <br />_12 <br />green (5G/3/2); nonplastic, hard, <br />14 <br />Joints : flush -thread <br />moist 4 <br />MW -7-41.5' <br />26 <br />44 <br />'' <br />41 <br />WELL SCREEN: <br />Material : Sch. 40 PVC <br />Diameter :2 -in. <br />Joints : flush -thread <br />43 <br />Slot Spacing : 0.010 -in. <br />ML <br />SAND PACK : No. 2/12 Sand <br />45--_17 <br />0 <br />22 <br />45 <br />TRANSITION : Bentonite chips <br />36 <br />MW -7-46.5' <br />48 <br />ANULAR SEAL: Neat Cement <br />SURFACE :8 -in. dia. <br />COMPLETION : steel well box <br />SILTY CLAY: 55% clay, 45% silt; <br />Notes: <br />50--_22 <br />dark yellowish brown (10YR/4/6); <br />24 <br />low to medium plasticity, hard, wet 3 <br />39 <br />San Joaquin Co EHD Permit <br />MW -7-51.5' <br />48 <br />#68149 <br />first groundwater encountered at <br />approximately 52 feet below ground <br />Depth to GW 48.40 ft. btc on <br />CL surface <br />10/16/13 <br />55-27 <br />3 <br />14 <br />25 <br />MW -7-56.5' <br />40 <br />SILTY SAND: 60% fine grained <br />sand, 40% silt; dark brown <br />(10YR/3/4); very dense, saturated <br />60 <br />-32 <br />no sample recovery at 60 to 61.5 <br />19 <br />SM feet below ground surface 4 <br />28 <br />40 <br />22 <br />9 <br />38 <br />65 <br />L CLAYEY SILT WITH SAND: 60% silt, <br />44 <br />65 <br />37 <br />25% clay, 15% fine grained sand, <br />I plasticity, hard, wet <br />70 <br />