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s TABLE 3 SOIL SAMPLE RESULTS 1766 MONTE DIABLO AVENUE STOCKTON, CALIFORNIA tti kt i�w t4' y °c♦ }, 4.,c 4"7777t11 4i i k# i�4\c "SIN X"'F Ems,..sia+V;t 4{ iY 4'3 44fit v} '+`` + \1V i \+i xku+„i`3 voi�„ i • 4 . 4 3. wti 4 �i1�RW�hfi�y2 4� .»�+i`YS4ti+^hV 1 i+fi�kx xvp }n a}:J�41 ,��pt 4V�h �E• "vv\��i 1 , +4;tiw \ �k t . 1 v h�4� `.v}.: +' ' off' h ' amu � i'1 rvi}}ti s k+,,w t rvt S9'6 Ssv}�v {{{•r 4{ry {•r {v� S{{ }+ 1{} �' Soil S-21-B2 <1 <0 005 <0 005 <0 005 <0 015 NA S-21-133 45 <0 005 0 057 024 078 NA S-31-B3 <1 <0 005 <0 005 <0 005 <0 015 NA S-21-B4 30 48 62 035 24 NA S-21-135 380 3 8 <0 05 76 38 NA Laboratory analyses performed by Matrix Environmental Laboratories, Inc Laboratory results reported in mg/kg (parts per million) TPHg= Total Petroleum Hydrocarbons as gasoline TPHd = Total Petroleum Hydrocarbons as diesel fuel <1 =Less than the laboratory method detection limits NA=Not Analyzed i 5.2 Monitor Well Construction Monitor wells were constructed in soil bonngs 132 through B4 using flush-jointed, 2-inch inner diameter, Schedule 40 polyvinyl chloride (PVC) casing No chemical cements, glues, or solvents were used in well construction The screened portion of each well consisted of factory-perforated casing with 0 020-inch wide slots The well screen was set through the hollow-stem augers and extended from the total depth of each boring to approximately 5 to 6 feet above the groundwater surface at the time the well was installed This construction will allow sampling near the air/water interface in the formation during seasonal fluctuations of groundwater elevations The base of each well was fitted with a threaded PVC end cap, and the top of each well was fitted with a watertight locking cap The annular space of each well was packed with sorted #3 Monterey sand to a point approximately Ito 3 feet above the tops of the perforated casing A 2- to 3-foot thick plug consisting of hydrated bentonite chips was placed above the sand in each well to prevent cement from entering the sand pack The remaining annular space was backfilled with a mixture of neat cement and powdered bentonite (<5%) to grade A traffic-rated, cast-iron utility box with a metal apron was placed over each wellhead and set in concrete flush to slightly above the surrounding grade Utility boxes such as these have a watertight seal to protect against surface-water infiltration and a cover fixed by countersunk bolts A locking i SEACOR 014-01-1 par 7 ti