Laserfiche WebLink
m <br /> k cbnlnry 19, 1991 <br /> l;valu:ttion OF Soil ;sttd Ground 1�':tter :SGS 38032.3 <br /> ' l_nocal Station No. f19SI Stackutn, California <br /> The ground water gradient, calculated from the data obtained on E cbnlary 13, 1990. was <br /> 0,000 to 0,0063 with an evaluated direction o1, flow toward the east <br /> for F�:Uruaalorthcast (f'{ate k' 1). <br /> and <br /> ile <br /> 'I'lle evaluated ground-water gradient Lasrnortheast. OOOOc'tobert18.c1990 <br /> 'and <br /> direction of ground-water flow las towards tilt <br /> November 19. 199 , during subjzctive analysis of the five monitoring wells, our s calclgtst slid <br /> not X111' 1, <br /> IW-2, NIW-3, and MW-3. Water was <br /> rlleasure water in monitoring wells <br /> measured in tnonitaritle well \ill' 1. o[t both clays. and Appears to be incrcasing. <br /> CONCLUSIONS <br /> Un the basis of our irtvestii2,1 , «e conclude file following: i <br /> u <br /> Geuoiinc hydrocarbons are presellt ill the soil beneath the site. Based o[1 the <br /> field assessments arni results of the laboratory analysis of pail samples from flus <br /> ll <br /> investigation, the Ilighest concentration a1 gasOl'lsl IltiStic rftOn]lO�`pro'l l:ltelvl4 <br /> the soil near the northeast corner of the nal tical results indicated gasohlle <br /> feet to 45 feet below grade (boring B-2). <br /> In'drocarbons are present appraxinlateIV 15 feet below grade near the northeast <br /> corner of the tank cavity;concentrations of gasoline hydrocarbons were UelotS' <br /> Come lUn II e to EO trace levels 2i feet to 45 feet below grade• `Grace levels of <br /> t?asolirle Ilvdrocarbons are present approlnlaiely 7j feel below grade southwest <br /> of the tank cavity, 111odE of levek of <br /> nln}i glands (bot i orocarb oils are present 35 feet <br /> below grade nor,11%v s ! <br /> la I <br /> 4 o Dissolve(( gasoline hydrocarbons are present - <br /> to the ground water beneath the <br /> site. 'rile highest concentration was detected in the well hear the northeast <br /> earner of tile lsite71l°cif€ectr i gvtlle gro�od,water. <br /> the gasoline hydrocarbons In <br /> the soil are 1 r <br /> o {oto€ and fecal coliform bacteria were also detected in water samples from <br /> monitoring wells X111'-2. MW-3, and MW-S. •these three monitoring Nvells are <br /> roughly in a bacteria <br /> Eine I?�l"I ells Ilel mavbeifit €ro 1 alleaking santtary sewerllltle that is <br /> detected in these three <br /> berleatll Pacific Avenue. <br /> ._...... _.......... .. .._..........._ .. ._..._.... <br /> tv ,Q/E7It7lied t11'DSYStSlT1S --- <br />