Laserfiche WebLink
, <br /> STEFFEN ROBERTSON AND KIRSTEN <br /> January 12, 1993 <br /> . AH 15 <br /> Ms. Margaret Lagorio, RENS ����IN4 i- ilxTH <br /> Senior.Environmental Health Specialist Pf�6v�ITf`�E �Ci S <br /> San Joaquin County Public-Health Services ERV <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> Stockton, California 95201 <br /> Re: Groundwater'Gradient,'-Diami5nd Lumber Retail Facility, Lodi, California <br /> Dear Ms. Lagorio: <br /> Pursuant to our telephone codversation (January 9'.1993)regarding the above referenced topic, please <br /> find an amended copy of page 5. Please insert this page into your copy of the Diamond Lumber-Lodi <br /> Quarterly Groundwater Monitoring Report, October 1992. A copy of this amended page was FAXed <br /> toyourattention on January 8, 1993. Also er closed are copies of the hand calculations and cross- <br /> sections used in determining the groundwater gradient at the Lodi facility. It should be noted that the <br /> groundwater gradient is extremely flat (the difference: in static groundwater elevations between .the <br /> highest and lowest point, 140 feet laterally, is approximately 0.15 feet). Our original presumption, <br /> (based-on regional topographic 'and hydrologic characteristics and information obtained from local . <br /> government agencies), indicated That the natural--groundwater gradient was toward the Mokulumne <br /> River located north of.the subject property. This-asstimption-is not qualified by our calculations, which <br /> indicate a very slight soutlierly gradient. <br /> z <br /> As always, your comments ate,welcomed. Please, do not hesitate to contact us if you have any ' <br /> questions or require additional'information. <br /> With regards; <br /> STEFFEN ROBERTSON AND KIRSTEN (U.SJ INC. <br /> Rob Gwilym,.C.P.G: <br /> Principal, Senior Environmierital Geoscientist <br /> David P. Schwieger <br /> : . r. Environmental Hydrogeolo&t. <br /> RG/DS/sal <br /> Enclosures Steffen Robertson and Kirsten (U.S.) Inc. <br /> cc: Ann Arney 15311 N E 90th Street;Redmond,,Washington, 98052, U.S.A. <br /> Tel. (206) 881-2233' Facsimile (206) 881-1581 <br /> Other offices in: U S:A., Canada, United Kingdom and Africa <br /> )2504.24\4a0 r+0.071 <br />