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} <br /> State of California Department of Health Services <br /> Merm ® rand um <br /> fo Jeanine Jones Date , May 27 , 1986 <br /> Senior Waste Management Engineer <br /> Subject: Navy Drive Sampling <br /> Plan <br /> Marge Rouch <br /> ^rom Waste Management Engineer <br /> The following are my questions and comments on the Woodward-Clyde <br /> sampling plan for the Lika Corporation Navy Drive facility: <br /> o Section 2 . 1, 3rd paragraph -- <br /> A description c:: boring and sampling equipment <br /> should be included. <br /> o Section 2 . 1, 4th paragraph - <br /> If DHS subsequently sets clean--up levels lower <br /> than the TTLCs, additional sampling and analysis <br /> will have to be done. TTLCs are used to define <br /> when a waste product must be managed as a <br /> hazardous waste; clean-up levels are used to <br /> ensure that site contamination be remediated to <br /> as near background levels as is practical, to <br /> minimize impacts to the community and the <br /> environment. <br /> o A paragraph should be added describing structural <br /> modifications such as sandblasting concrete-paved <br /> areas. <br /> o Section 3 . 0, 2nd paragraph- <br /> The Department requires that screen slot size and <br /> gravel pack material be designed according to <br /> filter criteria for the aquifer of concern at <br /> this site. Sizing of materials should be <br /> determined based on grain size distribution data <br /> from sieve analysis performed on the pilot hole. <br />