ML20150E929

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Preoperational Environ Survey Program Quarterly Rept, 710401-0630
ML20150E929
Person / Time
Site: Pilgrim
Issue date: 06/30/1971
From: Fix R, Rich Smith
BOSTON EDISON CO., INTERNATIONAL CHEMICAL & NUCLEAR CORP.
To:
References
NUDOCS 8804040188
Download: ML20150E929 (31)
v • d • e


Text

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PILGRIM NUCLEAR POWER STATION PREOPERATIONAL ENVIRONMENTAL RADIATION SURVEY PROGRAM QUARTERLY REPORT April 1, 1971 - June 30, 1971 BOSTON EDISON COMPANY BOSTON, MASSACHUSETTS 1

l Person responsible for ICN/TRACERLAB analyses of sampics & review of data Person responsib1( for BECo program ICN/TRACERLAB Chemical & Radioisotope Division International Chemical and Nuclear Corp.

1601 Trapelo Road, Waltham, Massachusetts 02154 8804040188 710630 PDR ADOCK 05000293 R PM

DISCUSSION OF RESULTS Air Surveillance Air particulate activity continued to increase as anticipated from the normally observed annual cycle. The monthly average values are significantly higher than those observed in 1970 due to the injection of new nuclear debris into the atmosphere in October 1970. The agreement between on-site, off-site and reference stations continues satisf actory.

Gamma dose measurement using thermoluminescent dosimeters appears satisfactory on the basis of comparing of f-site and on-site monthly averages.

The month to month variability at each location is somewhat more than desired and is being investigated.

Acuatic Surveillance Domestic and recreation water samples yielded analytical results which are consistent with those seen previously. Gross beta values show an increase O

in surf ace water during June reflecting the increase in f allout. May Sr values also show an increase for the same reason. Well water values continue below the detection limit. Surface water sa=pling was changed in June so that the monthly sample consists of a composite of e;ekly samples rather than a single grab sample.

Seawater fractional gross beta and specific nuclide values are similar to data observed previously.

Marine life data are also comparable to values f rom earlier periods.

I Initial evaluation of gamma spectra indicate the presence of 141,144Ce, 95Zr and ,

1 03,106 Ru in rockweed and Irish moss samples.

Te rres trial Surveillance Milk sample values showed the same range and variability of values observed during previous periods. The sampling method was changed in June to

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l a composite sample as described above for surface water to make the sample more representative of the entire month period.

Values f rom crop samples were comparable between locations and were I Ce, 952r and 03,106 similar to values from previous periods. '

Ru we re de-tected in the initial pro;essing of the gamma spectral data.

SUMMARY

The pre-operational environmental radiation surveillance program appears to be providing the correlation of data between locations which will permit mean-ingful comparisons for the operational data. The general variability to be expect-ed is also being defined.

No changes in the program are recommended at this time.

TABLE IA KEY FOR TABLES IB 6 IC Distance and FSAR

Reference:

Direction From Sample Table 2.6.1-Sample Location Station Desnination item #

East Weymouth 23 - miles NW EW 7 Plymouth Center 4.5 - miles W-WNW PC 6 Cleft Rock Area 0.9 - miles S CR 4 Manomet Substation 2.5 - miles SE MS 5 Rocky Hill Rd. , WNW Onsite WR 2 Overlook Area Onsite OA 1 Rocky Hill Rd., SE Onsite ER 3 i

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TABLE IB COMI'ARATIVE MONTilLY VALUES FOR GROSS BETA RADIOACTIVITY (Concentrations in pCi/m )3 Means Collection Pe riod Re fe rence Off-Site On-Site 1971 (EW) (PC) (CR) (MS) (OA)

(WR) (ER)

April 0.34 0.33 0.32 0.40 0.38 0.40 0.34 May 0.61 0.54 0.60 0.60 0.59 0.60 0.62 June 0.69 0.71 0.63 0.68 0.70 0.70 0.67 TABLE IC COMPARATIVE MON 111LY VALUES FOR GROSS BETA RADIOACTIVITY (Concentrations in pCi/m )3 Ranges Collection Reference Off-Site On-Site Period (EW) (PC) (CR) (MS) (WR) (OA) (ER) 1971 Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.

April 0.23 0.46 0.24 0.45 0.29 0.40 0.32 0.49 0.33 0.44 0.35 0.47 0.27 0.43 May 0.37 0.82 0.25 0.75 0.29 0.80 0.31 0.80 0.26 0.78 0.41 0.76 0.27 0.85 June 0.67 0.69 0.59 0.92 0.56 0.74 0.56 0.87 0.54 0.97 0.57 0.88 0.57 0.84 l

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TABLE 11A AIR PARTICUIATES Gross Beta Radioactivity (Concentrations in pC1/m3)

Manomet Rocky 11111 Road Overlook Rocky Hill Road Collection East Plymouth Cleft Rock Area substation West-Onsite A re a East-Onsite Period Weymouth Center 3.31 - 4.8 0.37 2 0.04 0.3320.04 0.32 ! 0.04 0.49 t 0.05 0.40 2 0.04 0.35 ! 0.04 0.27 2 0.03 4.8 - 4.16 0.46 2 0.05 0.45 2 0.05 0.40 2 0.04 0.46 2 0.05 0.44 2 0.05 0.45 0.05 0.43 2 0.05 4.16 - 4.22 0.3010.03 0.30 2 0.03 0.29 2 0.03 0.32 2 0.04 0.36 2 0.04 0.3520.04 0.31 ! 0.04 4.22 - 4.30 0.23 ! 0.03(*'0.24 t 0.03 0.29 2 0.03

  • 0.32 ! 0.04 0.33 ! 0.04 0.47 ! 0.05 (b)
4. 30 - 5. 7 0.61 2 0.07 0.55 ! 0.06 0.71 ! 0.08 0.59 2 0.06 0.59 2 0.06 1.03 2 0.11(c) 0.58 ! 0.06 0.75 2 0.08 0.80 2 0.08 0.78 t 0.08 0.73 2 0.08 0.75 2 0.08 0.85 t 0.09 5.7 - 5.13 0.82 2 0.09 5.13 - 5.21 0.45 2 0.05 0.42 2 0.05 0.41 t 0.05 0.54 2 0.06 0.59 2 0.06 0.46 2 0.05 (b) 0.79 2 0.08 0.79 0.08 0.8020.08 0.78 2 0.08 0.76 2 0.08 0.77 2 0.08 5.21 - 5.27 0.74 2 0.08 5.27 - 6.2 0.37 ! 0.04 0.2520.03 0.29 2 0.03 0.31 ! 0.04 0.26 2 0.03 0.41 ! 0.05 0.27 2 0.03 (b) 0.92 2 0.10 0.74 2 0.08 0.87 2 0.09 0.9720.10 0.88 2 0.09 0.84 2 0.09 6.2 - 6.10 0.72 2 0.08 0.63 2 0.07 0.64 2 0.07 0.67 2 0.07 0.69 2 0.07 0.65 0.07 0.66 ! 0.07 6.10 - 6.17 6.17 - 6.23 0.69 2 0.07 0.68 ! 0.07 0.57 2 0.06 0.61 ! 0.07 0.61 ! 0.07 (b) 0.61 2 0.07 0.67 2 0.07 0.59 2 0.06 0.56 2 0.06 0.56 2 0.06 0.54 2 0.06 0.57 2 0.06 0.57 2 0.06 6.23 - 6.30 l

l TABLE IIB Gros- h a Radioactivity (Concedrattorm ir cpm /m 3)

-2 -2 (10 ! 2)10~ (IC 2 2)10~ (12 2 2;s10~ (11 2 2)10 (12 2 2)10 (10 2 2)10~

April 1971 (10 2 2)10' -2 -2 (li ! 2)1r~ (11 2 ?)10 (11 2)10~ (11 2 2)10 (12 2 2)10 May 1971 (12 2 2)10~ (9 2 2)10~ -2 -2 (14 1 2)10~ (75 2 2)10

-2 (15 ! 2)19 (16 2 2)10~ (15 ! 2)10 June 1971 (15 ! 2)10~ (16 2 2)10~

(a) For East Weymouth and Cleft Rock 4.22 - 5.1.

(b) No sample due to equipment malfunction.

(c) Volume less than one-half normal volume. Vatae not inc'~ % in oin., max. o r pe ar.

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TABLE III

'[. AIR PARTICULATES Iodine-131 Activity (Concentrations in pCi/m )

j Collectf x Erst Plymouth Cleft Rock Manomet Rocky 11111 Road Overlook Rocky Hill Road Period Werma 'h Center Area Substation West Area East

[ 4.10 - 5.) <1 <1 <1 <1 <1 <1 <1

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5. t,') 3.21 <1 <1 <1 <1 <1 <1 (a) 6.2 - 6.10 (14 <1 <1 <1 <1 <1 <1 s.23 - 6.30 :1 <1 <1 <1 <1 <1 <1 3

i (a) No sample due to equipe nt malfunction.

(b) No sample - equipwnt out of service for maintenance.

TABLE IVA KEY FOR TABLE IVB Distance and FSAR

Reference:

Direction From Dosimeter Table 2.6.2-Dosimeter Location Station Designation Item #

East Weymouth 23 - miles NW EW 19 Kingston 10 - miles WNW KS 17 Sagamore 10 - miles SSE-S CS 18 Plymouth Airport 8 - miles WSW SA 16 Duxbury 6. 2 5- mil es NW SS -

Plymouth 6.5 - miles SSW-SW CP -

North Plymouth 5.5 - miles WNW NP 15 Plymouth Center 4.5 - miles W-WNW PC 14 South Plymouth 3 - miles WSW SP 13 Manomet 3.5 - miles SE-SSE MB -

Manomet 2.5 - miles SSE MS 11 Manomet 2.5 - miles SE ME 12 Manomet 2.25- miles ESE-S MP 10 Cleft Rock Area 0.9 - miles S CR 9 Rocky Hill Road 0.8 - miles SE ER 8 Bayshore Drive 0.7 - miles W-WNW BD -

Rocky Hill Road 0.3 - miles W-WNW WR 7 l

TABLE IVB MONTHLY AVERAGE DOSE RATE ("

uR/hr Off-Site Station April May J une Last Weymouth (EW) 13.1 10.3 13.3 Kingston (KS) 13.8 9.8 13.5 Sagamore (CS) 16.2 12.6 18 Plymouth Airport (SA) 12.0 9.6 11.6 Duxbury (SS) 10.8 9.6 10.1 Plymouth (CP) 11.8 9.3 13.1 North Plymouth (SP) 12.8 12.2 12.2 Plymouth Center (PC) 11.9 8.6 10.5 South Plymouth (SP) 14.3 10.9 13.8 Mano=et (MB) 10.8 7.7 8.2 Manomet (MS (b) 10.8 10.0 Manore t (ME) 15.1 11.7 13.5 Manomet (MP) 11.5 9.0 18.4 Cleft Rock Area (CR) 13.9 10.1 13.7 Rocky 11111 Rd.-SE (ER) 19.9 9.7 17 Bayshore Drive (BD) 13.0 11.2 12.2 Rocky Hill Rd.-WNW (WR) 14.3 12.8 12.9 (a) Net dose rate af ter subtraction of 6.6 uR/hr dose rate inherent in dosimeter.

(b) Dosimeter stolen.

TABLE IVC KEY FOR TABLE IVD Distance and FSAR

Reference:

Direction From Dosimeter Table 2.6.2-Dosimeter Location Station Designation Item #

Overlook Area 0.03 - miles S 0A 2 Public Parking Area 0.07 - miles N-NNE PA 3 Rocky Hill Rd. , SW 0.12 - miles SW A Rocky Hill Rd., SSE 0.26 - miles SSE B 5 East Breakwater 0.26 - miles ESE EB Microwave Tower 0.38 - miles S MT 6 Property Line 0.33 - miles ESE-SE C Property Line 0.34 - miles SE HB Property Line 0.89 - miles SE-SSE WH Property Line 0.68 - miles SE-SSE EM Property Line 0.75 - miles SSE-S E Property Line 0.21 - miles SSW H 4 Property Line 0.20 - miles WSW G Property Line 0.14 - miles W I 1 Prope rty Line 0.12 - miles NW F Property Line 0.17 - miles NNW D Property Line 1.36 - miles SSE-S J Property Line 1.42 - miles SSE-S K l

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TABLE IVD MONIHLY AVERAGE DOSE RATE (*

uR/hr l

On-Site Station April May J une Overlook Area (0A) 12.6 9.6 12.3 Public Parking Area (PA) 14.1 11.5 13.2 Rocky Hill Road (A) 12.8 11.3 11.9 Rocky Hill Road (B) 14.0 13.3 12.7 East Breakwater (EB) (d) 9.7 17 Microwave Tower (MT) 12.8 11.4 11.5 Property Line (C) 12.9 11.7 11.5 Property Line (HB) 13.8 10.4 12.7 Property Line (WH) 13.8 10.0 12.1 Property Line (EM) 17.4 9.9 14 Property Line (E) 102 (b) 10.9 14.7 Property Line (H) 14.1 12.5 11.4 Property Line (G) 14.2 12.0 12.6 Property Line (I) 14.0 11.6 (c)

Property Line (F) 14.1 12.5 12.0 Property Line (D) ,

15.5 13.2 14.4 Property Line (J) 12.0 10.9 10.1 Property Line (K) 12.1 11.7 10.5 (a) Net dose rate af ter subtraction of 6.6 uR/hr dose rate inherent in dosimeter.

(b) Abnormally high dosimeter background; removed from service y (c) Station removed by outside party.

(d) Dosime ter s tolen.

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TABLE VA KEY FOR TABLE VB Sample Distance and Direction Sample Location Designation from Station Great Pond

  • GP 24 - miles WNW-NW Little South Pond
  • SP 4.75 - miles W College Pond CP 6.5 - miles SSW-SW Lout Pond Well* LW 4.75 - miles W Manomet Well* MW 2.75 - miles SSE
  • Des ignated in FS AR, Sect ion 2. 6. 3.1 1

TABLE VB DOMESTIC AND RECREATION WATER Collection MW SP CP LW Analysis Period GP 3.7 2 1.0 3.3 2 1.0 < 1. 0 < 1. 0 Gross Beta April 5.7 2 1.0 (PC1/1) 5.9 1 1.0 3.2 2 1.0 4.3 2 1.0 < 1. 0 < 1. 0 May June (a) 8.7 1 1.0 9.6 2 1.0 5.3 1.0 < 1.0 <1.0

< 10 < 10 < 10 < 10 < 10 Gross Gamma April (cpm /1) 17 10 13 1 10 14 1 10 < 10 < 10 May

< 10 < 10 < 10 < 10 < 10 June (a)

April 0.6 1 0.5 0.9 1 0.5 0.6 2 0.5 < 0.5 < 0.5 Sr-90 (pCi/1) May (c) (b) (c) < 0. 5 < 0.5 June (a) 1.3 ! 0.5 0.9 2 0.5 1.0 0.5 < 0.5 < 0. 5 April < 2. 5 < 2.5 < 2.5 < 2. 5 < 2.5 H-3 (pCi/ml) Nby < 2.5 < 2.5 < 2.5 < 2. 5 < 2.5 June (a) < 2. 5 < 2. 5 < 2.5 < 2.5 < 2. 5 April <5 <5 <5 <5 <5 1-131 (pci/1)

May <5 <5 <5 <5 <5 June (a) <5 <5 <5 <5 <5 137

  • One (1) cpm is equivalent to 4.5 pCi if activity is assumed due to Cs.

(a) Composite of weekly samples for GP, SP and CP.

(b) Analysis in process.

(c) Reanalysis in process

FIO. 38 OROSS BETA IN GROUD AND SURFACE 4ATERS (pC1/ liter) i

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A l510 IN lD J lFlM l A IM lJ lJ l A lS l0 iN lD J lP lM l A lN lJ l 1969 1970 1971

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1- l -1 AIS10lNID JlFIMIAIMIJlJlA[Sl0lN]D J l F l M l A lM lJ l 1969 1970 1971

TABLE VIA SEAWATER CoJ1ection Fractional Gross Beta; pC1/1 Gross Gamma 11 1 Location Date Frac. I II III IV cpm /1 pCi/ml pCi/l Pilgrim Site 3.31.71 <5 <5 <5 <5 <10 < 2. 5 <5 5.6.71 <5 12 5 7!5 <5 < 10 < 2.5 <5 6.2.71 <5 14 ! 5 25 ! 5 615 < 10 < 2. 5 <5 April - <5 14 ! 5 5!5 <5 < 10 < 2.5 <5 June '71 Composite TABLE VIB SEAWATER (Concentrations in pCi/1) ection 90 137 54 58,60 65 Location Date Sr Cs Mn Co Zn l Pilgrim Site April - < 0.5 0.19 2 0.02 <5 <S <5 June '71 Composite

  • One (1) cpm is equivalent to 4.5 pCi if activity is assumed due to Cs.
    • volume analyzed - 17.0 liters

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TABLE VII (continued)

MARINE LIFE Sample

  • 90 Collection Cross Beta 137 g 131 g Type loca t ion Date pCi/gm Gross Gamma Sr M,g 58,60g , M Zn 59 g cpm /gm pC1/ $m pC1/Em pC1/g PC1/gm pC1/gm pC1/gm pC1/gm Rockweed Pilgrim Site (A) 4.16.71 9.5 2 0.2 0.07 ! 0.01 0.009 2 0.005 <0.05 < 0. 2 < 0.1 < 0.1 < 0.1 < 0.1 Rockweed Pilgrim Site (C) 4.16.71 7.61 0.2 0.0710.01 0.010 1 0.005 0.05 < 0. 2 < 0.1 < 0.1 < 0.1 < 0.1 Rockweed Rocky Point 4.16.71 7.5 t 0.2 0.04 2 0.01 0.007 2 0.005 < 0.05 < 0. 2 < 0.1 < 0.1 < 0.1 < 0.1 Rockweed Pilgrim Site (B) 4.17.71 10.1 ! 0.2 0.06 ! 0.01 0.007 t 0.005 <0.05 < 0. 2 < 0.1 < 0.1 < 0.1 < 0.1 Rockweed Manomet Point 4.17.71 7.9 2 0.2 0.05 t 0.01 0.012 1 0.005 <0.05 < 0.2 < 0.1 < 0.1 < 0.1 < 0.1 Rockweed Manomet Point 6.15.71 13.3 2 0.3 0.07 ! O.01 0.014 2 0.005 <0.05 < 0. 2 < 0.1 < 0.1 < 0.1 < 0.1 Rockweed Pilgrim Site 6.15.71 8.0 ! 0.2 0.09 t 0.01 0.010 t 0.005 <0.05 < 0.2 < 0.1 < 0.1 < 0.1 < 0.1 Rockweed Rocky Point 6.30.71 0.07 1 0.01 <0.05 < 0. 2 Rockweed Pilgrim Site (C) 6. 30. 71 0.14 t 0.01 <0.05 < 0. 2 Irish Moss Man n t Point 4.22.71 11.9 2 0.3 0.11 2 0.01 <0.005 <0.05 < 0. 2 < 0.1 < 0.1 < 0.1 < 0.1 Irish Moss Pilgrim Site 4.22.71 15.2 t 0.3 0.12 ! 0.01 <0.005 <0.05 < 0.2 < 0.1 < 0.1 < 0.1 < 0.1 Irish Moss Rocky Point 5.20.71 10.9 2 0.2 0.18 1 0.01 <0.005 <0.05 < 0.2 < 0.1 < 0.1 < 0.1 < 0.1 Irish Moss Manomet Point 5.20.71 11.7 1 0.2 0.17 ! 0.01 0.007 1 0.005 <0.05 < 0. 2 < 0.1 < 0.1 < 0.1 < 0.1 Irish Moss Pilgrim Site 6.12.71 0.19 2 0.01 < 0. 2 Irish Moss Manone t Point 6.18.71 15.2 1 0.3 0.17 2 0.01 <0,05 < 0. 2 Irish Moss E111sv111e 6.18.71 12.4 ! 0.2 0.14 2 0.01 <0.05 < 0. 2 Class Marshfield 6.10.71 3.8 1 0.2 0.20 ! 0.01 <0.05 < 0. 2 I

l

  • One (1) cpm is equivalent to 4.5 pC1 if activity is assumed due to 137 Cs.

no. 5A: RADICACUUTY IN MARINI LIFE (14BSTE)

GROSS BETA (pci/gn) 10 -

-10 8-

-8 6- -6 4_ --4 2-

-2

! I I I I I I I I I I I I l I l

GROSSGAMKA(cpm /gs)

+ Ealow Detection Limit 0.10 - 0.10 0.08 - -0.08 0.06 - --0. 06 0.04 - - 0.04 0.02 -

-C302

+ + -

0.00 I I I I I I I I I I I I I I I I

-0.00

0. 2f+-

-0.24

_ STRONU E 90 (pC1/gn) + Below Detection Limit _

0.20 - -0.2v 0.16 - -0.16 0.12 - -0.12 0.08 - J.08 0.04 - -0.04 0.00 -- --

0.00 Li l eggoo A L L ..w L a A L L L L L c 5 =L==cg=g333==gs o o y

FIO. 5B: RADI0ACUVITY IN MARINE LIFE (IRISH MOSS) 16 - -

16 03033 BrtA -

14 _ (P1/p) 0

- 14 12 -

- 12 10 -

10 8- -8 6- -6 4- -4 2- ~2 0

I I I I I I I I I I I I I 0.8 - GROSS GAFy.A (cpn/p)

- 0.8 0.6 -

- 0.6 0,4 -

- 0.4 0.2 -

- 0.2 0*0

  • l I I I I I I I I I I I I 0,og STRONUUM -90 (pCi/gm) f Below Detection Limit - 0.08 0.06 - - 0.06 O.04 _ - 0.04 0.02 _ - 0.02 O'00

+ ++++++' -

0.00 w

L L L L L L 6 N h. h,,uLN n ,b wen wg0 ~33gy-------

ezenu

FIO. SC: RADI0 ACTIVITY IN PARINE LIFE (M OUNDs:t) 12 -

-12

_ OROSS BETA (pCi/p) 10 -

10 6- 4 6- -6 4-4 2

-2 0

0 0.12 ,

l l I I l l l l l l I fI l l

-0.12 GROSS GAW.A (eps/p) f Below Detection Limit -

0.10 - -0.10 0.08 - -0.0B 0.06 - 0.06 0.04 - -0.04 0.02 - -0.02

+ + +

f -

0.00 i _T l l l l } l l I l l l l l 0.00 0.12 - -0.12

_ STRONIILL90 (pCi/p) + Below Detection Limit -

0.10 - -0.10 0.08 - --0. 08 0.06 - -0.06 i

0. 04 -- -Al . 04 0.02 - -0,02

+ +^+ +++

l 0.00

-+ ++ -

l I I I I I I I I I I I I n.00 I I i

4 O O O O

FIO. JD RAE0 ACTIVITY IN PraNS LIFE 12 - C0D MACXEREL POLLOCK -12 GdOSS BETA (pCi/gm) -

10 - 10 8- .. 8 4 -

6- 6

/

/ -

4-V

[ __h 2- -2 l l I l  ; I l

~~~

I l l l l I I I 0.10 - D.10

- GROSS GAMMA (cpn/gm) f Below Detection Limit -

0.08 - -

__c.08 0.06 - -0.06 0.04 - _o, . g 0.02 - -0.42

+ _

0.00 - ---0,00 l I I I I 1 I I I I i i I I I i 0o020 - STRONTIlb90 (pC1/gm) + Below Detection Limit 4 .020 0.016 - -G.016 0.01 2 - -.0.012 L-0.008 - _c.008 0.004 - --4.004 0.000 - --+ -- -- --

+ ^

I I I I c.000 .

l l i I I R R R O R R -t R

&&24SSSS RROs[ RORR O

&34SO 34SS O

~

TABLE VIII BOTTOM SEDIMENT Collection Gross Beta Gross Gamma Sr Cs Location Date pCi/g cpm /g pCi/g . pCi/g Discharge Canal 5.21.71 19.6 2 2.0 0.76 1 0.04 0.006 2 0.005 <0.05 East of Discharge Canal 5.21.71 15.8 2.0 0.62 2 0.03 <0.005 < 0.05 Gamma Spectrum Analysis Naturally occurring K constituted the majority of the activity. Peaks seen and the probable nuclides p resent are as fo110ws:

Gamma Energy (MeVJ Probable Nuclides 0.22 Pb 0.35 228Ac, 214 .Po 0.53 08 14 T1, Bi 0.94 Ac 1.15 Bi O

1.46 g 1.77 Bi l

137

  • One (1) cpm is equivalent to 4.5 pCi if activity is assumed due to Cs.

TABLE IX MILK (Concentrations in pCi/1)

Collection Sampling Locations Analysis Period flingham Plymouth B_ridgewa te r Cs-137 April 13 2 1 14 2 1 1621 May 15 t 1 17 1 16 2 1 June (a) 19 2 1 16 2 1 9t1 Sr-90 April 7. 3 0.2 6.4 2 0.2 9.3 ! 0.3 May 6.9 2 0.3 8.1 0.2 10.0 2 0.3 June (a) 12.9 0.4 10.6 ! 0.3 9.3 2 0.2 I-131 April <5 <S <5 May <5 <5 <5 June (a) <5 <5 <5 Ba/La-140 April <5 <3 <5 i May <S <S <5 June (a) <5 <5 <5 (a) Composite of week 13 samples l

i i _ , . _

4 l

- 24 24 - o l l

- a 6l _ . . _ __

o _

- 22 22 - l0

- -__ T 6 n o n - 20 20 - --

o __

__ qp a _

o - 18 18 - 0--^ r- 6 o a o -o. n o n 9 16 -

a o o n 0

n fe A

- 16 14 % o o u o - 14

- o u -

12 -o -- - 12 10 - U u a n - 10

- a a a a o u 0 -

8- 8 1

6- u 6 F

a HINGHAM 4- 4 o PLMOUTH -

3 BRIDGEWATIiR l 2- 2

- BOSTON (as reported in Radiological Health Ihta and Reports) -

0 i i i i e i i e iiiiii . .

i i i i 0

A S O N DJ F M A M J J A S O N D J F M A M J

1969 1970 1971 FIG. 6A
CESIUM 137 IN MILK (pC1/gm).

A HINGHAM - 24 24 -

o PLIMOUTH -

a BitIDGWATE - 22 22 - "

- BOSTON (as reported in Radiological _

Health Data and Reports)

- 20 20 -

- 18 18 - o u -

- 4 ,

a 0 - 16 n - 14 a _

y-- u o -- 12 12 - o a a a _.

-- n n - 10 10 a o

j_ O JL U O U _

_ g _.___

___- U ^ ---- U -0 7 o A A "

O u o- a o a n

o o 6- 0 0 -6

^ o

- f o 4- ~"

4 2- -2 0 0

, i i i , i i i i i r r- i i i i l- , i i 4

A S O N D J F M A M J J A S O N D J F M AM J 1969 1970 1971 FIG. 6B: STRCNTIUL90 IN MILK (pCi/ liter)

TABLE X CROPS Sample Collection Gross Beta Cross Gamma Sr Cs I Type Location Date pCi/g cpm /g p_C,i/g pCi/g pCi/g Cranberries Bog A 3.25.71 5.1 0.2 0.04 ! 0.01 0.086 1 0.005 0.06 0.05 < 0. 2 i

Cranberries Bog D 3.25.71 6.2 2 0.3 0.05 0.01 0.102 ! 0.005 0.10 ! 0.05 < 0. 2 Cranbe rries Bog F 3.25.71 2.6 0.2 0.03 2 0.01 0.077 1 0.005 0.18 ! 0.05 < 0. 2 Lettuce Bridgewater Farm 6.10.71 5.8 2 0.3 0.11 2 0.01 < 0. 2 Le tt uce County Farm 6.11.71 8.6 ! 0.4 0.15 ! 0.01 < 0.2 Hay Bridgewater Farm 6.17.71 22.5 1.1 0.26 ! 0.01 0.16 ! 0.05 < 0.2 Hay County Farm 6.18.71 32.1 ! 1.6 0.39 ! 0.01 0.20 0.05 <0.2 Hay County Farm 6.21.71 22.3 ! 1.1 0.21 0.01 0.15 2 0.05 <0.2 Hay Bridgewater Farm 6.31.71 12.9 0.6 0.21 0.01 0.09 ! 0.05 <0.2 Cabbage Bridgewater Farm 6.30.71 5.5 ! 0.2 0.04 0.01

< 0. 2 Cabbage County Farm 6.30.71 9.8 ! 0.2 0.02 ! 0.01

< 0. 2 l

l I

0 One (1) cpm is equivalent to 4.5 pCi if activity is assumed due to Cs.

APPENDIX A Results of Analyses Which Were Still In Process At The Time Of Printing Of The Report Covering The Period January 1, 1971 to March 31, 1971 TABLE VIII: MILK Collection Period Location Cs_pC1/1 Feb ruary Plymouth 14 ! 1 l

l

_ . _ _ - _ _ _ _ _ _

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