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Rot <br /> 4. �, ualityontrol nspection nc. <br /> MAIN OFFICE <br /> 1295 NORTH EMERALD,BLDG.Q•MODESTO,CALIFORNIA 95351 •PHONE:(209)527-4940 <br /> BRANCHES <br /> STOCKTON(209)466-8378 MERCED(209)723-2425 <br /> QCI# : G91-713 May 2 , 1991 <br /> FOR: Cen-Cal Associates <br /> P.O. Box 668 <br /> San Andreas, CA 95249 <br /> PROJECT: Henry Road Parcels (East Side) <br /> Henry & Carter Roads, (Southeast Corner) <br /> San Joaquin County <br /> SUBJECT: Percolation Testing <br /> On April 24 , 1991, representatives of Quality Control Inspection, <br /> Inc. prepared percolation test holes using a truck mounted drill <br /> rig in the area of the above mentioned project. The percolation <br /> test holes were located as selected by a member of our engineering <br /> - staff and as designated on the project percolation-test <br /> environmental health permit application. This percolation test was <br /> performed at the request and authorization of Roger Rumph of Cen- <br /> - Cal Associates, Inc. <br /> The test holes were presaturated 24 hrs before percolation <br /> testing commenced on April 25, 1991. The percolation testing was <br /> conducted according to San Joaquin County Department of <br /> Environmental Health regulations and was witnessed and observed by <br /> a representative of the San Joaquin County Department of <br /> Environmental Health. <br /> A total of 8 percolation holes were prepared at various <br /> - locations. At each of two test locations, a shallow (4 feet) deep <br /> test hole and a deeper (approximately 5-8 feet) test hole were <br /> drilled using 811 diameter solid stem auger. The shallow test hole <br /> - was drilled and tested as requested by the County, and the deeper <br /> test hole was located by our engineering staff for additional <br /> percolation data. The percolation test holes were sleeved with 411 <br /> diameter perforated pipe to prevent a potential cave-in and thus <br /> insure test hole integrity. Gravel was added to the bottom of the <br /> hole and placed in the annular space between the perforated pipe <br /> and the bore hole. Please find attached, the Field Percolation <br /> Testing Report (signed by the San Joaquin County representative) , <br /> indicating the test hole location, percolation rate and recommended <br /> sewage disposal area. <br /> QU TY CON p� L INSPECTION, INC. <br /> s Wry, P. <br /> JW/dj <br /> cc: 2 Client <br /> Our reports and letters are submitted as the confidential property of our clients for their exclusive use.Any publication or reproduction of statements,conclusions or extracts from or <br /> regarding our reports or letters is reserved,contingent upon the written authorization of Quality Control Inspection,Inc. <br />