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Z00 ' 3�tid 60SE 8s✓8 Fc� 23T :21 06 , 2Z NJf <br /> v .a./, <br /> WATERWORK <br /> GEOCHEMICAL•GEOTECHNICAL ENVIRONMENTAL <br /> January 19, 1990 <br /> Mr. Bob Noyes <br /> Telic Engineering <br /> P.O. BOX 2076 <br /> Stockton, CA 95201 <br /> Re: Knowles Property, 1140 West Hammer bane, Stockton, CA. <br /> Dear Bob: <br /> Please find the attached laboratory results for the excavation <br /> sampling and soil pile sampling at the above referenced site. <br /> The wall samples ranged from non-detected total petroleum <br /> hydrocarbons as gasoline (TPH) in the north wall to 75.4 and <br /> 336 .4 parts per million (ppm) on the south and north pit floor <br /> samples (at 35 feet) respectively. The composite soil pile <br /> samples ranged from 13. 9 to 251.7 ppm, TPH (as gasoline) The <br /> average concentration is 121..9 which under current air pollution <br /> control guidelines permits a total of 120 cubic yards of soil per <br /> day to be aerated without controls. <br /> If you have any questions regarding this project, please contact <br /> me at your convenience. <br /> Respectfully, <br /> WaterWork <br /> Robert W. Juncal <br /> Senior Geologist <br /> RWJ/tdp <br /> Attachment <br /> 1710 MAIN STREET • ESCALON,CA 95320 * (209)838-3507 <br /> FRESNO, CA(209) 222-3495 • RENO. NV(702) 788-6830 <br />