Laserfiche WebLink
T & T EARTH SERVICES <br /> ft Tom Hunt Tim Smith <br /> P.O. Box 1121 P.O. Box 1618 <br /> Jackson, CA 95642 Sutter Creek, CA 95685 <br /> W,W T & T (209) 223-2811 (209) 267-0903 <br />' y� EI.A7H SERY,�ES� <br /> s� <br />' October 1 , 1992 <br /> Michael Collins <br /> San Joaquin County <br /> Environmental Health Dept . <br />' 455 N. San Joaquin Street <br /> P.O. Box 2009 <br /> Stockton, Calif. 95201 <br /> Dear Mr . Collins, <br /> ' Enclosed are the laboratory results from sampling of the <br /> duplicate soil borings LCSB-10 and LCSB-4D recently completed on <br /> t the Les Calkins Truck Yard site at Acampo . The results show no <br /> detectable 80109 8020 or TPH-G (Cal Luft method ) hydrocarbons <br /> present in any of the four samples. I have completed a general <br /> risk appraisal and a Cal Luft leaching Potential Analysis which <br /> '. are included . <br /> Measurements of the water level in the two wells at the <br /> north end of the property some 1000' from the tank pit showed <br /> ' water standing at 56.5 feet and 57.25 feet from ground surface or <br /> at an elevation of 1 .0 feet below sea level . Elevation at the <br /> ground surface at the pit on the concrete slab is 56.55' above <br /> ' sea level . <br /> An attempt to sound the well 800 ' west of the pit on the <br /> truck yard lot was unsuccessful due to a constriction in the well <br /> casing . The existing pump in this well was hung at approximately <br /> ' 60 feet and recently went dry. The pump was subsequently dropped <br /> twenty one additional feet to renew production. A request was <br /> made to sound the well at Thomas Truck Yard some 600 feet <br /> ' southwest of the tank pit but access was denied . <br /> Based on the information the general risk appraisal <br /> indicated that a Leaching Potential Analysis should be performed <br /> for the site. The following is the breakdown of that scoring : <br /> ' Minimum depth to ground water 57'-23'=35' <br /> (From deepest contaminated sample) . . . . . . . . .Score 5 <br /> ' Fractures in subsurface , None. . . . . . . . . . . . . . . . . . Score 10 <br /> ' Average annual precip . 17 . 11 inches <br /> (Lodi 1961-90 D.O.C. Climatography <br /> •, of the U.S. #81 ) . . . . . . . . . . . . . . . . . . . . . Score 9 <br /> ' Man made conduits None <br /> (No well within .600' and leachfield <br /> at office is above elevation of <br /> tankpit bottom) . . . . . . . . . . . . . . . . . . . . . . Score 10 <br />