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�\ A <br /> PUBLIC HEALTH SEWICES <br /> SAti IOAQUIN COUNTY = :i <br /> JOG1 KHANNA,\t.D..IKP.H. �: < <br /> HealCil Officer s 'CP <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) •Stockton, California 95201 <br /> cQ�iFp'R`': <br /> (209) 468-3400 <br /> 140V 18 1991 <br /> BOB ROBINSON � rF <br /> DOANE PRODUCTS COMPANY is <br /> U <br /> P O BOX 879 <br /> JOPLIN MO 64802 <br /> RE: 450 East Grant Line Rd. IN REPLY REFER TO SITE CODE: 2441 <br /> Tracy, CA 95376 <br /> San Joaquin County Public Health Services, Environmental Health <br /> Division (PHS/EHD) has completed review of the Work Plan for <br /> Remediation Excavation prepared by Brunsing Associates dated <br /> October 24, 1991. PHS/EHD comments follow. <br /> PHS/EHD does not agree with the proposed cleanup level, 20 ppm TPH- <br /> diesel. Due to the shallowness of groundwater at the site, PHS/EHD <br /> cannot approve the proposed cleanup level. Residual contamination, <br /> remaining at the conclusion of the re-excavation attempt, will <br /> require additonal remediation. <br /> Initiate quarterly monitoring of MW-1, P-1, and P-2. Screening of <br /> groundwater quality at the time of tank removal, January 16, 1991, <br /> indicated contamination: 35 ppb benzene, 175 ppb toluene, 1500 ppb <br /> ethylbenzene, 1100 ppb xylene and 85 ppm TPH-diesel. Table 1 of <br /> the excavation work plan inaccurately reported the results of the <br /> January 16, 1990 groundwater screening. It may be necessary to <br /> drill an additonal well in the tank pit/excavation area, to show <br /> that groundwater has not been impacted. <br /> Reports, work plans and letters are to be submitted to both PHS/EHD <br /> and the Central Valley Regional Water Quality Control Board <br /> (CVRWQCB) until the investigation and cleanup is adequate for <br /> closure. This will facilitate concurrent and expeditious <br /> evaluation by both agencies. <br /> PHS/EHD agrees with the re-excavation proposal and recommends that <br /> the site be granted a grading permit from the City of Tracy. <br /> A Division of San Joaquin County Heahh Clare Ser ices �! <br />