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October.i2,'200o <br /> Job Number:LG00-312. . 1 <br /> Page 8 ; <br /> Percolationtesting of Parcels"16, 18' 20, and 22 was initially outside.the scoj <br /> ti <br /> work plan based.on our.clients request...When asked"if the-percolation tests woulded . <br /> for testingIifthe parcelswere found unsuitable from a nitrate loading standpoint,"-MHuggins, Supervising Environmental Health Specialist'San 7oaquin County EnvironalthDivision,'agreed that if a nitrate loading analysis indicated the lots were unsuitable dG 4 small acreage,that ercolation test would not be re uired.- Several da s later Mr.'RP q y Estrada,-Senior Environmental Health Specialist San Joaquin County EnvironinentaDivision,indicated that percolation-testing for these lots would be required by the C <br /> A decision was made and.discussed with-Mr. Estrada to conduct a shallow percolation <br /> tests on the four small parcels ata depth of 3-feet to satisfy this requirement. Since no plans to <br /> develop parcels 1G, 18, 20, and 22,exist,no extra,effort was made to locate-deeper sandy lenses <br /> that would increase,the probability of achieving a satisfactoiy percolation rate. Mr. Estrada a <br /> indicated this would satisfy the requirement of testing each parcel regardless of pass or fail. i <br /> A percolation test was performed in each of the twenty-two (22)lots. The casing used for <br />'F the test was a.2-inch diameter P i e with an open en to "and bottom. Two(2) <br /> inches of"pea graveP'was placed-in the bottom of the hole,the casing was installed, and one-(1) <br /> foot of"pea gavel'was backfilled in the annr lar space. <br /> Botha one(1)hour percolation test and a four'(4)hour percolation tests were utilized to <br /> on October 6°'and 10'h, 2000 in aceordance.with the requirements of San Joaquin County <br /> Environmental Health Division: .The.placement ofthe:test'was in a location that could be used for <br /> placement of a future septic system. The testing of each of the parcels.was observed by <br /> `.Rodney Estrada, Senior registered Environmental Realth'Specialist -San Joaquin County } <br /> Environmental Health Division. A satisfactory pereolatimit.rate was measured for each of the <br /> Parcels and are suitable for conventional se tic stems with leach lines and seepage pits with the <br /> exception of parcels-.18, 20, and 22(See Appendix). <br /> An unsatisfactory pereolation�rate was observed in three(3)'of the four small sized lots a <br />:F . discussed previously. If it becomes desirable at some point to obtain satisfactory percolation rates F <br /> for-parcels 18,20, and 22,we believe this is possible with a deep percolation test set adjacent to a <br /> permeable unit. _ . <br /> VII.. 141TRATE.LOADING STUDY <br /> A build.up of nitrates in the upper ground-water zones can cause a temporary blood <br /> disorder in infants called methemoglobinemia(blue baby syndrome). Serious and occasionally. <br /> r <br /> 1. .- .. - ... <br />