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l� <br /> 3756 Auburn Blvd Suile A <br /> Sacramento CA 95821 <br /> ENGINEERING AND ENVIRONMENTAL SERVICES Teiephone (916) 485 7222 <br /> FAX {916) 485 8098 <br /> 12 January 1994 <br /> Mr Bill Vizza <br /> Public Works Director <br /> City of Tracy <br /> 520 Tracy Boulevard <br /> Tracy, California 95376 ` <br /> Subject Comments by San Joaquin County, PHS/EHD <br /> Groundwater Investigation - 301 W Grantline <br /> Tracy, California - <br /> HLI 10101 - <br /> Dear Mr Vizza <br /> This letter transmits information requested by San Joaquin County PHS/EHD in their letter <br /> dated 21 December I993 The County has requested seven items of information which <br /> include <br /> 1) The gradient calculations performed on the data of 19 October 1993, <br /> • 2) A corrected Table 1 showing calculated water elevations from 19 <br /> October 1993, <br /> 3) The water level measurements and gradient calculation from 27 October <br /> 1993, <br /> 4) The boring log for MW-3 <br /> 5) The measured distances between the monitoring wells, <br /> 6) The gradient calculations for October 1993 and December 1993, <br /> 7) The location of all domestic, agricultural, and municipal wells within a <br /> 2,000 foot radius of the site <br /> In prior conversations with Mr Steve Sasson of San Joaquin County, we were advised that the <br /> County desired additional sets of groundwater level measurements be made Since we were <br /> in the vicinit\ of the site on 8 December, we collected a set of groundwater level <br /> measurements on that date This information and corrections to the 19 December information <br /> reported are presented in the attached Table l We have provided copies of the graphic <br /> solutions used to calculate groundwater flow direction and gradient The distances between <br /> wells are listed below <br /> MW-I to MW-3 57 feet <br /> I\fW-1 to NfW-2 24 feet <br /> MW-2 to MW-3 54 feet <br />