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STATE OF CALIFOMI':A - E o„onmental Proto—on Agency PETE WILSON, Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> 3443 Routier Road, Suite A 9 <br /> Sacramento, CA 95827-3098 w 9 <br /> PHONE: (91 6) 255-3000 " <br /> FAX: (916) 255-3015 <br /> 15 June 1994 <br /> JUN 9 3 1994 <br /> Mr. Chao Wu <br /> C & L Tracy Group Partnership ENVIRONMENTAL HEALTH <br /> 6985 Silver Fox Drive PERS. MSERVICES <br /> San Jose. CA 95120 <br /> i ac L inr"lkC I %-I'-R01—,r I'ARTP?L'R CHIP, 100 S. TRABLVD.. TRA( Y. SAN 3Gr"►QUIN <br /> COUNTY ---- -- <br /> I have reviewed your 15 March 1994 first quarter sampling report and your 14 April 1994 letter <br /> requesting that no further work be required by the Board at this site. After a review of the file and <br /> the summary of all ground water sampling events, no further action is required at this time. <br /> In the eight rounds of sampling that have been conducted since 1989 there was only one hit of total <br /> petroleum hydrocarbons as diesel (TPH-D) at 1.39 ppb in MW1. The limiting water quality goal <br /> for TPH-D is 100 ppb based on a taste and odor threshold. There also were four hits, one in each <br /> monitoring well, of total vanadium from 0.03 to 0.04 ppb. The limiting water quality goal for <br /> vanadium is 100 ppb based on agricultural water quality goals. All other analytes tested were below <br /> the method detection limits. Therefore the Board does not deem the soil contamination at this site to <br /> be a significant threat to water quality at the present time and requires no further action. <br /> This concludes the investigation by the Board. This site now will be referred back to the <br /> Department of Toxic Substances Control (DTSC) as outlined in the 27 June 1991 letter from Mr. <br /> Anthony J. Landis of DTSC to Mr. Eric Sung of Serena Investment Corporation (copy attached). <br /> If you have any questions you may contact me at (916) 255-3054. <br /> Iyj <br /> EPi/H <br /> DAVID E. JENKINS <br /> Associate Engineering Geologist <br /> HoUsNO AUTHOR" <br /> cryVDEJ:dej\ldj OAQU <br /> cc: Mr. Eric Garcia, Department of Toxic Substances Control, Sacramento <br /> Mr. Alan Bell, Tracy Planning Department, Tracy <br /> Ms. Margaret Lagorio, San Joaquin County Public Health Services, Stockton <br />