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""- c'- ^ ate- .3a 'r' �, a '-= - ts'' :: Vii:`•§- Ya ''�. <br /> 'in <br /> 1:110 <br /> �111 GROUNDIA&ITER <br /> TECHNOLOGY, INC. a084")t,►rL_=,e.a,ncorJ.C:1�1t53Q <br /> f415tGi1? Fi7 "_1 <br /> November 16, 1990 <br /> Job No. 203 175 3189 , <br /> '0V 2 <br /> 0 <br /> Mr. Harlan Knoll, R.E.H.S. ! :. ° f ► <br /> San Joaquin County Health Services Department w •,,i i., ""` <br /> P.O. Box 2009 <br /> 100 East Hazelton Avenue <br /> Stockton, CA D4553 i <br /> RE: Chevron Former Station 19-0342 <br /> 1374 South E1 Dorado, Stockton, California <br /> - E <br /> i <br /> Dear Mr. Knoll: f <br /> As we discussed in our telephone conversation of October 2, 3.590, <br /> this addendum to Groundwater Technology Inc. 's Soil Excavation <br /> and Well-Installation Report (August, 1990) for the above-- <br /> referenced site, takes note of the following omission from the <br /> Summary section of that report: <br /> E. a Laboratory Analyses Results for two of the soil samples <br /> from the waste oil pit excavation were above the <br /> 4 Minimum Detection Level of 5 parts per million (fpm) : <br /> 1. WO-1 = 15 ppm; and i? <br /> F <br /> 2. WO-3 = 21 ppm E <br /> u In addition, on page 20 (summary) , concentrations of <br /> compounds in water should be in parts per billion (ppb) , <br /> rather than in parts per million (ppm) . The two correc- <br /> ted -sentences-on-this page--should-re;-.d.--"Concentrations <br /> of TPH-ac-gasoline in the groundwater-samples ranged <br /> from MDL to 1,500 ppb. Concentrations of benzene ranged <br /> from MDL to 890 ppb." <br /> Offices thnuph-eut the VS,Canada and I;tawxas <br />