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Mr. Sheldon Heckman -4 - 12/27/01 <br /> Mr. Richard Calone, Esq., <br /> Richard Calone, Inc. <br /> analyses in Table 1, which is a collection of multiple investigation tables. The Work Plan does not <br /> provide a list of all proposed MDLs. Please provide a table of the proposed MDLs for all analyses. <br /> 8. Section 3.7 Ground Water Sample Collection And Analysis, page 15, Bullet 3: The text states that <br /> groundwater will be analyzed for unspecified physicochemical or bio-enumeration constituents by <br /> unspecified EPA or ASTM methods. Please include a list of constituents that will be analyzed, and <br /> indicate which analytes will be used to determine the feasibility of"natural attenuation" <br /> (bioremediation), as mentioned in Section 1.0 in the text. The USEPA website can be searched to <br /> obtain the guidance for monitored natural attenuation (NINA), which contains a list of MNA <br /> parameters needed to evaluate the feasibility of natural attenuation. <br /> 9. Section 4.5 Well Development And Survey: Please complete the last sentence and insert the missing <br /> word, which appears to be "monument" or"benchmark". <br /> 10. Figure 10 should show graphically that the bentonite plug will be set at less than the indicated 20 <br /> foot plus well screen depth, not 48 to 50 feet as now shown. <br /> 11. Table 1: The soil analytical results units of measure are missing from pages 1, 2, 4, and 5 of the <br /> table. Please copy the appropriate footnotes from the appropriate pages, or footnote the correct units <br /> (Table 1 is a combination of several tables with different units of measure). <br /> Please provide a revised Work Plan by 1 February 2001, addressing the comments above. Include a <br /> revised schedule for the submittal of a detailed investigation report, in accordance with the previously <br /> provided (1 October 2001) Attachment B (Items To Be Included In A Site Assessment Report), which <br /> includes, at a minimum, results of the soil and groundwater investigation for petroleum hydrocarbons <br /> and volatile organic compounds. Also provide a submittal date for a remedial action plan, in accordance <br /> with the previously provided (1 October 2001) Attachment C (Items To Be Included In A Remedial <br /> Action Plan), which includes, at a minimum, <br /> a. the remedial options to clean up petroleum hydrocarbon and volatile organic compounds <br /> in soil and groundwater, <br /> b. an engineering evaluation/cost analysis for each remedial option, <br /> c. and a proposed remedial option. <br /> If you have any questions please contact me at (916) 255-3050 or bartonj @rb5s.swrcb.ca.aov. <br /> aures L. Barton, R.G. <br /> Associate Engineering Geologist <br /> Attachment A <br /> cc: Mr. Michael Infurna, San Joaquin County Environmental Health Services, Stockton <br /> Mr. William Little, Advanced GeoEnvironmental, Stockton <br />