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M <br /> KLEINFELDER <br /> File No. 20-3551-01 <br /> May 26, 1992 <br /> Mr. Bert Sandman <br /> c/o A. Teichert & Son, Inc. <br /> P.O. Box 15002 <br /> . Sacramento, CA 95851 <br /> Subject: ADDITIONAL SERVICES <br /> PROPOSED SUBDIVISION ON NORTH CLEMENTS ROAD <br /> SAN JOAQUIN COUNTY, CALIFORNIA <br /> Dear Mr. Sandman: <br /> } <br /> INTRODUCTION <br /> This letter presents the results of additional services provided as <br /> requested by San Joaquin County Environmental Health Services for <br /> the subject subdivision. The proposed approximate 160-acre <br /> subdivision will contain sixteen approximate 10-acre lots located <br /> at 19977 through 20243 North Clements Road in San Joaquin County, <br /> California. Reference is made to our septic system suitability <br /> study report dated January 27, 1992 , which was prepared for the <br /> subject subdivision. <br /> Environmental Health Services personnel have expressed concern that <br /> the installation of sixteen domestic water wells at the site could <br /> cause excessive drawdown of the groundwater table. In addition, <br /> they also requested that the existing on-site wells be sampled and <br /> tested for general mineral content and PCB's. <br /> WATER DRAWDOWN <br /> In your letter dated April 17, 1992, you indicated that your family <br /> acquired the ranch in 1956, at which time approximately 80 acres <br /> were in irrigated pasture. over the succeeding thirty-two years of <br /> your ownership, as much as 140 acres were irrigated in a single <br /> year. We understand that the last season the ranch was irrigated <br /> was in 1988 . <br /> As indicated in your letter, typical annual irrigation consisted of <br /> pumping approximately 600 gallons/minute, 20 hours/day, 6 days/week <br /> for a six-month period. This averages to a little over 71, 000 <br /> gallons per day on an annual basis. We understand that during this <br /> time period no significant drawdown of the groundwater table was <br /> observed. i <br /> Coppyyrt ht 1992 Kleinfelder, Inc. <br /> KLEINFEEp R 2825 East Myrtle Street, Stockton, CA 95205 (209) 948-1345 <br />