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f I,E. <br /> LEVIN&FRICKE <br /> GUNSULTING ENGINEERS AND HYDA06EDLOGISTS <br /> January is , 19a9 LF 1439 <br /> Mr. Kevin Huber <br /> Grupe Development company <br /> 2291 West March Lane, Suits 200E <br /> Stockton, California 95209 <br /> Subject: Grouting Procedures for Environmental site <br /> Assessment, Ripkin Property in Stockton, California <br /> Dear Kevin: <br /> To (supplement the field procedures in our Work Order No. 1, dated <br /> January 10, 1989, the following procedures will be implemented <br /> during grouting of soil borings drilled for our site assessment <br /> of the Ripkin property: <br /> 1. a cement-bentonite mixture consisting of 2 sacks of bentonite <br /> (50 pounds each) per 25 sacks of Portland cement (94 pounds <br /> each) will be used to seal borings; and <br /> 2. if water is present in the borings, the cement-bentonite <br /> grout mixture will be tremied (using tramie pipe) into the <br /> open boring from the bottom of the borings. <br /> I believe that these procedures are in accordance with the San <br /> Joaquin ,County Local Health District's requirements. <br /> The appropriate San Zoaquin Local Health District staff member <br /> Will be notified 24 hours in advance of the time that grouting <br /> takes place to arrange an appointment for inspection of the <br /> grouting. <br /> Please contact me or Scott Seyfried if you have any questions. <br /> Sincerely, <br /> Beth Gurey�R E.A. <br /> Project Scientist <br /> 1960 Powell Street, 12th Floor <br /> Emeryville, Callforn,a 94608 <br /> (416) 652-4500 <br /> Other offices/n NF"CRT BEACH and CAKLAW, CA <br />