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i <br /> As requested the following work plan addresses the items of <br /> concern as outlined in the April 18, 1991 letter from SJC-EHD, <br /> items 1 through 4. <br /> r <br /> a VARIFICATION SAMPLING OF TANK FIELD <br /> : <br /> iii s P sus � &and cg�e ,fs�.w borings. toAsthe :11 `fOot .depth at <br /> w .nd a a]a oar the s k ,fs,e, d, see Figure 3D. Depth to graiind <br /> water for this site ranges from 11.71 to 12.91 at monitor well <br /> MW1 . <br /> '� �7t"a._uAVir4.'�tn( .i.�=.Y'rs';5'amplke 'wil'1- ber"`cil5`t�$h' d.. to <br /> , r, and field screened for total volatile organic <br /> vapors using a HNu photoionizing detector with a 10.2 electon volt <br /> bulla. <br /> r�s. �3��Yi'���:�2!��:����!.�.:� A�s a��•3�'e�ve ;��cmlPPed<.�`w'�th�..arl.�lY�ahi'ahum <br /> � P 'w th �wl�gbe�� 1dcrtShu�k tape.:$ <br /> for analysis of Total <br /> Petroleum Hydrocarbons Gas (TPH G) using GC FID (5030) and BTEX <br /> using method 8020 as shown on Table #2, page 17 of Tri-Regional <br /> E-+ Hoard Staff Recommendation August 10, 1990. <br /> .a <br /> ' VA,RIFICATION SAMPLING FOR LEAD AT WASTE OIL EXCAVATED AREA <br /> �39uth4We�Rd <br /> ��aa� lar ` t1 <br /> iri a 4 m �Lo' mid~ �f'sAvolubA' dwae ' <br /> tater 1��s►d <br /> arising method 7421. <br /> VARIFICATION OF CONTAMINANT FREE GROUND WATER CONTALMINANT FREE <br /> DOWN GRADIENT OF TANK FIELD. <br /> eanp �y9 ?? { 14 ,11 �tM� ),.w1.:Z:: '` Ie3 ' 'rio =th®heti o.f,,.: e <br /> ' C <br /> t# &1e-1401 At the <br /> time the sample is obtained monitor wells MW1, MW2 and MW3 will be <br /> gauged for depth to ground water, along with the newly installed <br /> MW 4. I „ �k3a �l �nara ;# �s7r'7d:.i�:ndicatest,rth ,rt�a�: .,;gnd ::_w.aeac:;.,, <br /> WELL CONSTRUCTION <br /> The well will be drilled under Western Gee-Engineers C-57 drilling <br /> contractors license (513857 ) using a hand auger with a 7 ,5" <br /> J page2 <br />