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California R Tonal Water Quality Montrol Board <br /> Central Valley Region x` <br /> Steven T.Butler,Chair <br /> Winston H.Hickoz Gray Davis <br /> Secreraryfor Sacramento Main Office Governor <br /> Environmental Internet Address: hripl/w .swtcb.m.gov/- gcb5 <br /> Protection 3443 Roufier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916).255-3000•FAX(916)255-3015 <br /> 30 December 1999 <br /> Mr. Tony Martin <br /> Kleinfelder, Inc. <br /> 2825 East Myrtle Street <br /> Stockton, CA 95205 <br /> SPRECKLES MANTECA, SAN JOAQUIN COUNTY(Case No. 860) <br /> I have reviewed the Abandonment of MW-3 and Construction of MW-3r work plan dated December 6, <br /> 1999 and the supplemental well construction and site data sent at a later time. The plan proposes the <br /> abandonment of a background well,MW-3 and the construction of a replacement well, MW-3r at a like <br /> hydrogeologic location. The reason for abandoning MW-3 is the sale and future development of the lot <br /> where the well is located. <br /> The proposed location for MW-3r is upgradient of the former lime ponds, in a like hydrogeologic <br /> location to MW-3. The work plan proposes to drill a boring to 100 feet, collect groundwater samples <br /> every five feet and install the well screen based on sample results. A ten-foot well screen is planned. <br /> This method for locating impacted groundwater is appropriate in a downgradient monitoring well, it is <br /> not desirable for a background well. In order to monitor background groundwater chemistry the well <br /> should be screened at first water. Given the historical range of water levels reported in the work plan, <br /> the well may need at least a 20-foot screen length. <br /> A brief letter amending the work plan to address the issues noted above will be sufficient for approval to <br /> proceed with this work. <br /> If you have any questions please call me at(916)255-3116. <br /> ROSS D. ATKINSON <br /> Associate Engineering Geologist <br /> cc: Mr. Ron Rowe, San Joaquin County Public Health Services, Stockton CA <br /> Mr. Bing Kirk,Atherton Kirk Development Company, Stockton CA <br /> California Environmental Protection Agency <br /> �Cf Recycled Paper <br />