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I l <br /> JIM & <br /> File No. 20-1083-90 <br /> June 26, 1990 <br /> Paul Dismukes <br /> 20348 South St. John Avenue <br /> Escalon, California 95320 NM� P�G <br /> Subject: PERCOLATION TEST ENvpCti�J11�ISE <br /> PROPERTY AT 20348 SOUTH ST. JOHN AVENUE <br /> SAN JOAQUIN COUNTY, CALIFORNIA <br /> MS-90-11 <br /> Gentlemen: <br /> As requested, on June 20, 1990 representatives of our firm drilled. <br /> and set-up 1 3-foot deep percolation test hole at the requested <br /> location. The percolation test hole was hand-drilled and cased <br /> with slotted PVC pipe. The percolation test hole was filled with <br /> water and left to soak overnight. <br /> A representative of our firm returned to the site on June 21 , 1990 <br /> and performed the percolation test per San Joaquin County <br /> guidelines . The test was performed for a period of 1 hour and the <br /> last 10 minutes were used to calculate the percolation rate of. 7 <br /> minutes per inch. The county approved percolation field test sheet <br /> is included with this letter. <br /> We trust this letter presents the information requested at this <br /> time. If you have any questions , please contact us . <br /> Respectfully submitted, <br /> RLEINFELDER, INC. <br /> Steven R. Davis, C.E .G. <br /> Engineering Geologist � � <br /> Ron Heinzen, G.E. 4:4 R „ __ � <br /> Regional Manager ��-�°`�. <br /> SRD:bja <br /> JU90/cc: San Joaquin County Environmental Health <br />