ML20151N999

Requests Permission to Discontinue Monitoring Water Level Elevations & Ph Around acid-affected Area.Affected Area Has Been Stabilized Using Chemical Solidification Process Described in Encl

ML20151N999
Person / Time
Site:	Grand Gulf
Issue date:	08/03/1988
From:	Reaves T SYSTEM ENERGY RESOURCES, INC.
To:	Bill Rogers MISSISSIPPI, STATE OF
References
APO-88-0771, APO-88-771, NUDOCS 8808090156
Download: ML20151N999 (8)

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i EYETEM ENERGY RE50lJRCES, INC.

hous E rnis p becict twea sxce August 3, 1988 Mr. Bob Rogers Bureau of Pollution Control Mississippi Department of Natural Resources Post Office Box 10385 Jackson, Mississippi 39209

SUBJECT:

Grand Gulf Nuclear Station Unit 1 Sulfuric Ac1J Spill Final Report APO-88 / 0771

Dear Mr. Rogers:

We request permission to discontinue monitoring water level elevations and pH around the acid-affected area at the Grand Gulf Nuclear Station Water Treatment Building. The affected area has been stabilized using a chemical solidification process as described in Attachment I.

The solidification process began May 13, 1988 and ended June 24, 1988. With the exception of 4 wells which are outside the acid-affected area, all monitoring points have been solidified as shown in Attachment II.

Data obtained since July 1987 is shown in Attachment III. Water level elevations have remained constant since July 1987. From July through December 1987 only minor changes were seen in pH, with acidic readings below 5 noted in wells P-21, P-22 and P-27. No wells read below pH 5 in 1988.

Two letters describing this spill event and recovery activities were sent to the Mississippi Department of Natural Resources dated April 18, 1986 (APO-86/0468) and August 11, 1987 (AP0-87/0639).

If you have any questions, please contact Ms. R. R. Jackson, Supervisor, Environmental Services, at (601) 984-9366.

Sincerely, I h[

72.0 -

er GWG/GEA/RRJ:swb l

Attachments l

cc: (See next page) i 8808090156 880803 DR ADOCK0500g6 P o ecx 23:t l mscu M ss.ssm m:5-rn l (con Su c3%

J22AP087072601 - 1 m/ w w w con m Ill 1

APO-88/0771

, , Pogo 2 of 2 cc: Mr. C. S. Chisolm (MDNR)

Mr. W. T. Cottle Mr. M. L. Crawford Mr. C. R. Hutchinson Mr. W. F. Mashburn Mr. R.-F. Rogers File (Central) [8]

File (ENV)

File-(NS)

File (R&ES) l Dr. J. Nelson Grace Regional Administrator U. S. Nuclear Regulatory Commission e Region II 101 Marietta Street, N. W., Suite 2900  ;

Atlanta, Georgia 30323 l l

Document Control Desk U. S. Nuclear Regulatory Commission Washington, D. C. 20555 (All of the above w/ attachments) l J22AP087072601 - 2

. ~. _

ATTACHMENT I SOIL MODIFICATION AND GROUTING PROCESS Soil modification and chemical grouting was chosen to neutralize and stabilize the affected soil. Sodium silicate plasticizer reacts with acid to form a stable mass similar to soil cement. Prepakt Concrete Company of Richmond, Virginia, performed the work.

The Prepakt Technician directed the placement of injection holes, grout pipes, relief and observation holes, mixing of chemicals, determination and adjustment of gel times and grouting sequence. The number and location of injection boles were such that overlapping of grout from adjacent holes occurred. The grout was injected through a tapered high pressure tube which released a fine grout stream that created a consolidated soil mass.

PENV FINAL ACID REPORT ATT/88 t . _ _ _ .

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, ATTACHMENT II

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WATER TREATMENT BUILDING _

QEMISTRY LABORATORY

$ WC-33

- WmR mm1 m l

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$ WC-36 l h WC-29 h WC-35 -

1 DOESTIC WATER STORAGE TAE RESTROCH WELLS SOLIDIFIED P-21 h $ P-22 P-27 O O P-28 g P-21 ><

P-22 P-10 O e-9 o P-i5 o >c WC-E9 WC-32 EC-33 WC-35 ><

WC-36

)c BOP TRAGFORMLRS WELLS NOT SOLIDIFIED P-9 ><

O P-10 ><

P-i5 L L 6 L L AS-2 o AS-2

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I ATTACHMENT III l

JULY - DECEMBER 1987 pH RANGES Page 1 of 4 WELL # MONTH pH RANGE JULY 2'756 - 2.73 AUGUST 2.60 - 3.00 P21 SEPTEMBER 2.60 - 2.81 OCTOBER 2.48 - 2.82 NOVEMBER 2.60 - 7.36 DECEMBER 2.70 - 6.99 -

JULY 6.05 - 6.77 AUGUST 6.26 - 6.74 P22 SEPTEMBER 6.67 - 6.92 OCTOBER 5.90 - 7.01 NOVEMBER 5.75 - 7.59 DECEMBER 2.37 - 6.90 JULY 5.19 - 6.02 AUGUST 5.59 - 6.26 i WC33 SEPTEMBER 5.30 - 5.93 -

OCTOBER 5.25 - 5.90 l NOVEMBER 5.27 - 6.55  !

DECEMBER 5.95 - 6.97 j JULY 6.92 - 7.45 i AUGUST 6.39 - 7.58 I WC35 SEPTEMBER 6.64 - 7.03 l 6.23 - 6.57 OCTOBER )

NOVEMBER 6.22 - 7.20  !

DECEMBER 6.88 - 7.89 i JULY 6.28 - 7.08 .

AUGUST 3.99 - 7.40 l P27 SEPTEMBER 6.04 - 6.60 1 OCTOBER 4.24 - 7.11 l NOVEMBER 4.41 - 7.85 DECEMBER 4.47 - 8.03 JULY 5.91 - 7.34 AUGUST 5.90 - 7.03 P28 SEPTEMBER 6.39 - 6.83 OCTOBER 5.90 - 7.22 NOVEMBER 6.28 - 8.12 DECEMBER 4.30 - 7.72 JULY 6.74 - 7.82 AUGUST 6.31 - 8.03 AS2 SEPTEMBER 7.08 - 7.91 OCTOBER 6.20 - i.82 NOVEMBER 5.98 - 8.15 DECEMBER 6.60 - 8.73 PENV FINAL ACID REPORT ATT/88

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l ATTACHMENT III j

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JULY - LECEMBER 1987 pH RANGES -

Page 2 of 4 WELL # MONTH pH RANGE JULY 6.75 - 8.92 AUGUST 6.84 - 9.00 WC29 SEPTEMBER 6.35 - 7.36 OCTOBER 5.34 - 6.81 NOVEMBER 5.53 - 7.43 DECEMBER 7.09 - 7.79 JULY 6.34 - 6.89 AUGUST 6.17 - 7.04 WC36 SEPTEMBER 6.07 - 7.02 0CTOBER 5.74 - 6.50 NOVEMBER 6.05 - 7.13 DECEMBER 6.92 - 8.15 JULY 6.90 - 7.55 AUGUST 6.93 - 7.66 P9 SEPTEMBER 7.26 - 8.00 OCTOBER ,.42 - 8.34 NOVEMBER 6.80 - 8.57 DECEMBER 6.43 - 7.55 JULY 9.05 - 9.31 AUGUST 8.34 - 9.24 P10 SEPTEMBER 7.70 - 9.17 OCTOBER 7.30 - 9.00 NOVEMBER 7.01 - 8.65 DECEMBER 7.02 - 7.81 JULY 7.65 - 8.04 AUGUST 7.30 - 8.13 PIC SEPTEMBER 7.79 - 9.06

~~ OCTOBER 7.16 - 8.31 NOVEMBER 6.26 - 8.60 DECEMBER 7.09 - 7.93 JULY 6.23 - 6.50 AUGUST 5.86 - 6.54 WC32 SEPTEMBER 5.61 - 6.39 OCTOBER 5.48 - 5.89 NOVEMBER 5.49 - 6.81 DECEMBER 6.32 - 7.10 PENV FINAL ACID REPORT ATT/88

b I ATTACHMENT III JANUARY - JUNE 1988 pH RANGES Page 3 of 4 1

WELL # MONTH pH RANGE JANUARY 6.58 - 7.15 FEBRUARY 6.60 - 7.05 I P21 MARCH 6.54 - 7.17 l APRIL 6.23 - 7.04 l MAY 6.96 - 11.66 I JUNE 10.80 - 11.03 JANUARY 6.41 - 7.23 FEBRUARY 6.65 - 7.16 P22 MARCH 6.74 - 7.45 APRIL 6.62 - 7.55 MAY 6.82 - 10.62 JUNE 10.59 - 10.89 JANUARY 5.87 - 6.13 -

FEBRUARY 5.50 - 6.02 WC33 MARCH 5.82 - 6.05 APRIL 5.55 - 6.20 MAY 5.79 - 6.04 I JUNE SOLIDIFIED JANUARY 6.75 - 7.36 FEBRUARY 7.00 - 7.33 WC35 MARCH 6.72 - 7.35 APRIL 6.80 - 7.45 MAY 7.03 - 8.36 JUNE SOLIDIFIED JANUARY 5.33 - 7.09 FEBRUARY 6.64 - 7.01 I P27 MARCH 6.67 - 7.47 I APRIL 6.65 - 7.69 MAY 7.36 - 11.60 JUNE 10.50 - 10.87 JANUARY 5.20 - 7.15  ;

FEBRUARY 6.62 - 7.38 '

P28 MARCH 6.03 - 7.54 1 APRIL 6.55 - 7.45 MAY 6.25 - 7.40 JUNE 8.90 JANUARY 7.10 - 8.04 FEBRUARY 6.81 - 7.95 AS2 MARCH 6.52 - 7.73 APRIL 7.13 - 8.80 l MAY 7.94 - 9.45 JUNE 7.52 - 8.97 l

PENV FINAL ACID REPORT ATT/88 l

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ATTACHMENT III I JANUARY - JUNE 1988 pH RANGES l Page 4 of 4 WELL # pH RANGE MONTH ] '

JANUARY 6.56 - 7.67 FEBRUARY 6.85 - 7.20 WC29 MARCH 6.35 - 7.25 APRIL 6.80 - 7.71 MAY 7.02 - 8.12 l JUNE 8.63 - 8.80 s JANUARY 6.91 - 7.45 FEBRUARY 6.63 - 6.99 WC36 MARCH 6.46 - 6.86 )

APRIL 6.40 - 7.03 MAY 6.75 - 8.43 l JUNE SOLIDIFIED l JANUARY 6.66 - 7.11 l FEBRUARY 6.46 - 7.18 P9 MARCH 6.77 - 7.43 APRIL 6.43 - 7.40 I MAY 6.86 - 7.22 l JUNE 6.72 - 7.40 l JANUARY 6.89 - 7.41 1 FEBRUARY 7.02 - 7.86 P10 MARCH 7.29 - 8.04 APRIL 7.45 - 8.65 MAY 7.80 - 8.35 JUNE 7.16 - 8.30 JANUAfY 7.06 - 7.31  !

FEBRUARY 6.68 - 7.26 i P15 MARCH 5.76 - 7.23 )

APRIL 6.78 - 7.66 '

MAY 6.98 - 7.65 JUNE 6.70 - 7.57 JANUARY 6.50 - 6.81 FEBRUARY 6.11 - 6.42

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WC32 MARCH 6.05 - 6.35 APRIL 5.74 - 6.52 i MAY 6.15 - 10.82 I JUNE SOLIDIFIED PENV FINAL ACID REPORT ATT/88

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