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05/19/2001 08:1.8 FAZ 201 *,e.e0621' ..� 2j00:, : INFcLDE.3 Er-VRnNN' IE:NTU ZE_'_I =- DEL R'Ni-` i ?E_R,L1T REV Ems% sttdv was .-o:d=c d OL :f L - - systems. On Acr:i 274 'CC~ .._ zmpiovze ;z =nvi_~onmzat=� e - -_v-- pulled tte 7e:Illlls On -_. :0 cond::ct-h-S z-;ai=zon. G:iv = sz✓dc ,� ;n ie. both for adja;eat prope.�es. :rt i?est. `o. 7.1-=36. meted '�1ay 10. ?97- w,-z --- _� �s East Tokay Colony Road. —L= pe.- .dr is cr an addi ion of cne 30-600t ierc_- ., =d an addition of one inch diameter ?y =f root dee'- sevoaze pi:. 1:1e second ?e._:_. to. 71 dated_ uril 12, 1971, is fur tis .-,taiiar: -'- ze ,_-root leach r� on of ..: i.....s and wo = rat;att'r by 25-foot deeo seenase pits. 3ot:u of to pe.:r_ts -ver-- for adaitions,installatiotis. GR0 N-D W A=R_ DEPTR Dunn;the time. of cur investi=t�cn. _around:vate:was not —coun:.-rtd. Line S OI :0 Groundwater contour mans pL'JL: ite l 1n goundwa_Or :=ons jV '.~e San :oaC".:,^ ' . _._ 'J ccd Control =d '.Naze: Consc^aticn D1srr:c: 3:.o:v _reundvvater from about 90 -o 115 fee: oelow g7--=d su;ace sen Spring 198: ro SDrn,a 1990 FIELD EXPLORATIONS :SVD TESTL�TG The ,-ubsur:-ace conditions at -he site were e=iered on Januar; 20, 2003, by percolation borings to depths between approximatciy 6.5 and 7.5 fee.below a7dstin_ — Tae borings wets drilled using a Simco 2400 crawier-mounted drill .. e•uppe:i -With 6-inch diameter solid-stem auger. tae locations of the percolation tesLs ars given in the beie:v. The approximate percolation tzs lecat ons are presented on the attached plate. Pard�Fum�er '::Locirion• j 1 1290' east and 420'north of southwest Z)MDe-t•v co=er 1570' east and 300' :Orth of southwest oronezty corner I 3 1 260' east and 7 85' north of southwest pro-Derry comet 4 154L0' east and 730'north of southwest oronerty corner Based on our tidings, the subs=-ace soils encou:to ed consisted of mrficial clay uzd:xiain by interbedded layers of clayey and sandy silts and silty sands to the:rax;mum depths expier-- The percolation tzsts were per'caned on April 21, 2003, in accordance with aceepte;i n idelines using clear potable water. Tae procedure callsfcrt placing about 2 inches or :ef*ave: at the bottom of the boreiiole. T::e hole is then pre-soaked with water. at least 24 hours prior to performing the test. The 6.5 to 7.5-foot deep tests were performed by adding about 1 to '_.5 fee: of water above the ;avel in the hole_ From awed reference poir_z, the drop in wa= level is measured in approximately 30-mute intervals for four hour; renIling as necessary to :aaintai. the prescribed amount of water over the gravel. Under the obser ration of a sanimr;:. :;orn the San Joaquin Co=ry, Environmental Health Deparment (SJGE1-ID), the last 30-minute reading 25208.G01/S T 03R'16 May 5,2003 ®_003 Klerinfelder,Inc. 1323o:of 3