m hc - Ting n khu vc cng cng v dn c
m hc - Ting n khu vc cng cng v dn cMc n ti a cho php(TCVN 5949 :
1998)Acoustics - Noise in public and residental areasMaximum
permited noise level.
1 Phm vi v lnh vc p dng.Tiu chun ny qui nh mc n ti a cho php ti
cc khu cng cng v dn c.
Ting n ni trong tiu chun ny l ting n do hot ng ca con ngi to ra,
khng phn bit loi ngun gy n.
Tiu chun ny p dng kim sot mi hot ng c th gy n trong khu cng cng
v dn c.
Tiu chun ny khng qui nh mc n bn trong cc c s sn xut, c s kinh
doanh, thng mi, dch v.
2 Tiu chun trch dnCc tiu chun sau y c p dng cng vi tiu chun
ny:
TCVN 5964 :1995 m hc - M t v o ting n mi trng - Cc i lng v phng
php o chnh.
TCVN 5965 : 1995 m hc - M t v o ting n mi trng - p dng cc gii hn
ting n.
TCVN 6399 : 1998 m hc - M t v o ting n mi trng - Cch ly cc d liu
thch hp s dng vng t.
3 Gi tr gii hn.3.1 Mi loi ngun n do hot ng sn xut, kinh doanh,
dch v, sinh hot... khng c gy ra cho khu vc cng cng v dn c mc n vt
qu gi tr qui nh trong bng 1.
3.2 Phng php o n xc nh mc n ti khu cng cng v dn c c qui nh trong
cc tiu chun TCVN 5964 : 1995; TCVN 5965 : 1995 v TCVN 6399 : 1998/
ISO 1996/2 : 1987.
Bng 1 - Gii hn ti a cho php ting n khu vc cng cng v dn c( theo
mc m tng ng) n v : dB(A)
TTKhu vc ( * )Thi gian
T 6h n 18hT 18h n 22hT 22h n 6h
1Khu vc cn c bit yn tnh:
Bnh vin, th vin, nh iu dng, nh tr, trng hc, nh th, cha
chin.504540
2Khu dn c, khch sn, nh ngh, c quan hnh chnh.605550
3Khu dn c xen k trong khu vc thng mi, dch v, sn xut.757050
* Xem thm hng dn ph lc A
Ph lc A(Qui nh)Gii thch mt s im trong ni dung Tiu chunA.1 Khi
tin hnh o/nh gi xc nh mc n so vi mc n qui nh trong tiu chun, th mi
im o u c thc hin ti khu cng cng v dn c. Trong trng hp khu dn c c
xen k cc c s sn xut, c s kinh doanh, thng mi, dch v hoc khu dn c nm
xen k trong khu sn xut, thng mi, dch v th khng p dng o ting n trong
phm vi cc c s .
A.2 Cc khu vc nu trong bngA.2.1 Khu vc cn c bit yn tnh : L ni cn
c s yn tnh cha bnh, chm sc sc kho, hc tp, nghin cu, ging dy, th cng
tn nghim,...
A.2.2 Khu dn c, khch sn, nh ngh, c quan hnh chnh...L khu vc v lm
vic hnh chnh l ch yu. Mi c s sn xut, kinh doanh, dch v khi nm trong
khu vc ny u khng c gy ra ting n cho khu vc cho khu vc vt qu gi tr
gii hn cho php tng ng nu trong bng. Nu mc n nn khu vc ny vt qu gi
tr gii hn nu trong bng th mi hot ng sn xut, kinh doanh, dch v cng
khng c gy ra mc n tng cao hn mc n nn c.
A.2.3 Khu dn c xen k trong khu vc thng mi dch v v sn xutL khu vc
hot ng thng mi, dch v v sn xut l ch yu, trong c th c khu dn c nm k
hoc xen k vi cc c s sn xut, kinh doanh thng nghip v dch v. Mi hot
ng thng mi, dch v hoc sn xut khng c gy ra ting n vt qu gii hn cho
php tng ng nu trong bng. Nu mc n nn khu vc ny vt qu cc gi tr gii hn
nu trong bng th mi hot ng sn xut, kinh doanh, dch v cng khng c gy
ra mc n tng cao hn mc n nn c.
