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f, <br /> Jonathan Marlow <br /> Page 2 <br /> Further lead analysis must also be performed.The California Code�of Regulations,Title 22,Article 3,Section <br /> 56261.24.,requires that lead samples which exceed the soluble threshold limit concentration(STLC)of S ppm <br /> even though they are below the total threshold limit concentration (rTL.q of 1000 ppm,must undergo the <br /> Waste Extraction Test (WET) to determine which portion of the total lead is soluble. <br /> I <br /> On November 26, 1991 PHS/EHD conducted a site inspection to cbserve�sampling of the domestic well and <br /> MW-1. FGL representative Mark Brock was unable to remove the traffic box lid to sample MW-1. During <br /> the November 27, 1991 telecommunication between PHS/EHD and Jonathan Marlowe it was agreed that <br /> arrangements would be made to make MW-1 available for sampling. I C <br /> I� h <br /> Further soillgroundwater investigation is required to delineate the verticWhorizontal extent of <br /> soil/groundwater contamination. A minimum of two additional monitoring wells will be required to determine r <br /> the groundwater gradient. <br /> In addition to the quarterly report due January 20,1992 please sub[nit a work plan for the additional soil and <br /> groundwater investigation by March 16, 1992. <br /> I <br /> If you have any questions, comments, or to schedule a groundwater sampling inspection, please contact <br /> Mary Meays, EHS, of my staff at (209) 468-3441. '�' <br /> r <br /> Jogi Khanna, M.D., M.P.H. <br /> Health Officer'' <br /> Laurie A. Cotulla, REHS, Program Manager <br /> Environmental Health Division <br /> LAC/MM i <br /> Enc. <br /> 1 ;t <br /> c: Elizabeth Thayer, CVRWCQB <br /> ea <br /> i� <br /> i <br /> I <br /> f <br /> i <br /> �i <br /> ,I� <br />