SU0005046 SSNL - Laserfiche WebLink

Home Browse Search

September 9, 2005 NOA Project Number: E05110A hole: The last half an hour of each test was observed by Mr. David Van Dyne, Senior Registered Environmental Health Specialist, EHD.. Measurement of the water level during the percolation test was from a fixed reference point on the PVC casing using an electric well sounder with an depth-accuracy of 1/100th foot. All tabulated values on the field data sheet (appendix) are in decimal feet." After water drop was observed, the riholes were checked for refill.. The refill level-was approximately 0.5 ft (6 inches) of water above the bottom level of the percolation test hole. The readings were taken every.30 minutes for a period of four hours. 6.6 Percolation Test Forms and Results The completed percolation'test form is included in the appendix of this report.. A shallow percolation test is defined by the.EHD as being between 36 and 42 inches in depth; a satisfactory percolation rate for a shallow test is less than or equal to 60 minutes per inch drop.-A deep percolation test is defined as being between.3.5 and 25 feet in depth;a satisfactory percolation -rate for a deep testis 30 min/in or less. One percolation test must demonstrate a-satisfactory I percolation rate within the proposed septic system disposal-field of each parcel'to utilize a standard y septic system. Details of the percolation tests'are summarized in Table 7. Table 7. . Summag of Percolation Tests Test No., Percolation Percolation Rate Test Comment.- Date Tested Test-Depth(ft) (minutes/inch) Duration (see notes) P-1 shallow,8/26/05 - arcell) ,�- 3.13_ 6.57 4-hr Satisfactory percolation rate {P � zV`__ — - 1 _ P-1 deep,8/26/05 250 4-hr Slow percolation rate,fail (Parcel 1 - 3 Note_:_ A satisfactory percolation rate fora"shallow'test is less than or equal to GO minutes per inch. A satisfactory percolation rate for a"deep"test is less than or equal to 30 minutes per inch. 6.7 Discussion of Percolation Test Results The soils within the sewage--disposal areas for the sballou percolation test have demonstrated a satisfactory percolation rate in accordance with the requirements:of the EHD for the use of a } . standard septic system. 6.8 Discussion of Septic System Sizing Septic System Construction should follow the San Joaquin County On-Site Wastewater Disposal [ Standards where applicable.