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Advanced , <br /> GeoEnvironmental, Inc. �• : --::: <br /> SAN JOAQUIIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> 12 December 1997 304 E. Weber Ave.Third floor ' <br /> AGE_NC Project No.,97-0312 P.O. Box 388, Stockton,CA 95201-0388 <br /> Phone: (209)468-3420 <br /> Mr.'Michael Inform <br /> SAN JOAQUIN COUNTY PHS-EiiDApt7roved <br /> 304 East Weber Avenue;Third floor <br /> droved with changes: See Remarks , <br /> Stockton,California 95202 � "" . <br /> Disapproved::See Remarks <br /> Subject Soil Stockpile Sampling and BacltMing orExcava#ion Remarks <br /> CHEROKEE TRUCK STOP <br /> 3535 East Cherokee Road,Stockton,California ... <br /> Rear Mr.ln&rna_ <br /> . - Date ZZ <br /> In aoeordance with the request of our client Mr.Elis Cecchh of Ceccf iim,Czcchini and Giovannoni <br /> tldvawed GeoEnvironmental, Inc. (AGS collected and analyzed samples from stockpiled s;-lApprovak of these plans extend only to that <br /> looted at 3535,East Cherokee.Road,Stockton,Calfornia The stockpiled soil was generated dtuingWhICh ist-shown and described hereon but <br /> overowavation prooedtmes performed after the removal of six underground storage tanks(UST)osdoes not authodZe or approve any omission <br /> la September 1997- or deviAf bn of requirements of State laws or <br /> Approximately 490 cubic yards of soil are currently stockpiled on the property.On 22 NovemberLocal G di nances. <br /> 1997,the stockpiled soil was spread to a thickness of approximately three feet.The stockpile was <br /> then divided into sections ofapproumateiy 25 cubic yards each One soil sample was collected from <br /> a depth of approximately 1.5 to 2 feat below the surface near the center of each section.Bach sample ' <br /> was analyzed for total petroleum hvdro=bons quitimfied as gasoline and diesel(TPF-g and TPH-d) <br /> .and volatile aromatic hydrocarbons(benzene, toluene, ethylbenzene and xylenes;BTE&X} with <br /> methyl tertiary-butyl ether(MTBE).A total of 16 soil samples were collected and analyzed-The <br /> stockpile location,sample locations and grid areas are illustrated on Figure 1. <br /> TPH-g and TPH-d were detected at toadrations as high as 1,500 parts per million(ppm,reported <br /> as milligrams per kilogram)and 4,100 ppm,respectively.Toluene,ethylbenzeae and xylenes were <br /> detected at concenirations up to 0.54 ppm 2.4 ppm and 44 ppm,respectively.Benzene and MTBE <br /> were not detected in the samples analyzed Analytical results are summarized on Table 1.Procedures <br /> and findings will be summarized in a Quarterly Report to be prepared by AGE. <br /> Ground water was recorded at a depth of 55 feet bsg in March 1997,the highest elevation since <br /> monitoring began in 1990.7he floor of the UST excavation is at a depth of approximately 15 feet <br /> before the addition of any backfill material,leaving a distance of 40.feet between the bottom of the <br /> 4005 Nonh Wilson Way.Stockton.Cafifomia 95205 <br /> Telephone(209)467-1006 FAX(209)467-1118 <br />